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See searches and references containing NEGATIVE FEEDBACK!NEGATIVE FEEDBACK
Control concept
Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends
Negative_feedback
Process where information about current status is used to influence future status
positive feedback. Negative feedback: If the signal feedback is out of phase by 180° with respect to the input signal, the feedback is called negative feedback
Feedback
Type of electronic amplifier
A negative-feedback amplifier (or feedback amplifier) is an electronic amplifier that subtracts a fraction of its output from its input, so that negative
Negative-feedback_amplifier
Loop that increases an initial effect
which the results of a change act to reduce or counteract it has negative feedback. Both concepts play an important role in science and engineering,
Positive_feedback
Feedback related to climate change
greenhouse gas emissions. Positive feedbacks amplify global warming while negative feedbacks diminish it. Feedbacks influence both the amount of greenhouse
Climate_change_feedbacks
High-gain voltage amplifier with a differential input
while the less common current-feedback op amp (CFOA) amplifies the current between its two inputs. By using negative feedback, the characteristics of an
Operational_amplifier
Electronic device/component that increases the strength of a signal
high, usually around 5%, until 1934, when Harold Black developed negative feedback; this allowed the distortion levels to be greatly reduced, at the
Amplifier
Feedback between climate change and the effect of clouds on radiation
planetary albedo and contribute to cooling, making the overall cloud feedback negative (one that slows down the warming). Vice versa, if they change in such
Cloud_feedback
are viewed as complex dynamical systems. The study of positive and negative feedback processes, attractors and system dimensionality, phase transitions
Complex system approach to peace and armed conflict
Complex_system_approach_to_peace_and_armed_conflict
Electronic component delivering stable electric current regardless of voltage
circuits the output current is not monitored and controlled by means of negative feedback. They are implemented by active electronic components (transistors)
Current_source
Electronic comparator circuit with hysteresis
mechanical contact bounce in switches. They are also used in closed loop negative feedback configurations to implement relaxation oscillators, used in function
Schmitt_trigger
Method for converting signals between digital and analog
(DACs). Delta–sigma modulation achieves high quality by utilizing a negative feedback loop during quantization to the lower bit depth that continuously
Delta-sigma_modulation
American electrical engineer
revolutionized the field of applied electronics by inventing the negative feedback amplifier in 1927. To some, his invention is considered the most important
Harold_Stephen_Black
Character in the Toy Story franchise
rallied against him. After Disney executives saw the draft, they sent negative feedback about it and production on the movie was shut down, until a better
Woody_(Toy_Story)
Study of circular causal processes
Cybernetics is the transdisciplinary study of circular causal processes such as feedback and recursion, where the outcomes of actions return as inputs for subsequent
Cybernetics
through upstream elements, this is canonically negative feedback (red blunt arrow). A negative feedback loop is also known as a balancing loop, and it
Biochemical switches in the cell cycle
Biochemical_switches_in_the_cell_cycle
Biological signalling molecule
response to specific biochemical signals and is often subject to negative feedback regulation. For instance, high blood sugar (serum glucose concentration)
Hormone
Rhetorical technique to deliver criticism
of the feedback, and therefore the original intention of advising is not achieved. Over time, the employee might anticipate the negative feedback whenever
Compliment_sandwich
Symptoms from excessive exposure to glucocorticoids such as cortisol
the level of the adrenal glands (via an adenoma or hyperplasia), negative feedback ultimately reduces ACTH production in the pituitary. In these cases
Cushing's_syndrome
alters the ability of plants to grow in that soil in the future. Negative plant–soil feedback occurs when plants are less able to grow in soil that was previously
Plant–soil_feedback
Systems Dynamics concept
it impossible to build a plant with exactly the right capacity. A negative feedback loop slows down a process, tending to promote stability. The loop
Twelve_leverage_points
Negative feedback mechanism regulating the glomerular filtration rate
In the physiology of the kidney, tubuloglomerular feedback (TGF) is a feedback system inside the kidneys. Within each nephron, information from the renal
Tubuloglomerular_feedback
Characteristic quality of sounds from vacuum tube amplifiers
with global feedback loops. Design architectures with local feedback can be used to compensate for the lack of global negative feedback magnitude. Design
Tube_sound
Electrical circuit component which amplifies the difference of two analog signals
series negative feedback (op-amp follower, non-inverting amplifier, etc.), where one input is used for the input signal, the other for the feedback signal
Differential_amplifier
1960 self-help book by Maxwell Maltz
or a large shaggy dog. Negative feedback should be used to correct toward our goals. If corrective action on negative feedback isn't progressing one toward
Psycho-Cybernetics
the first to propose that the mechanism driving these rhythms was a negative feedback loop. Subsequent major discoveries confirmed this model; notably experiments
Transcription translation feedback loop
Transcription_translation_feedback_loop
Period of long-term reduction in temperature of Earth's surface and atmosphere
Each glacial period is subject to positive feedback mechanisms, which makes it more severe, and negative feedback which dampens the overall climate response
Ice_age
Psychological attribution concept
difficulty that members of stigmatized or negatively stereotyped groups may have in interpreting feedback. According to this concept, a person who perceives
Attributional_ambiguity
State of steady internal conditions maintained by living things
gene expression through up-regulation or down-regulation and act in negative feedback mechanisms. An example of this is in the control of bile acids in
Homeostasis
Compliment to undermine the receiver's confidence
Negging ("to neg", meaning "negative feedback") is an act of emotional manipulation whereby a person makes a deliberate backhanded compliment or otherwise
Negging
Neurons in the hypothalamus central to hormonal control of reproduction
kisspeptin, neurokinin B (NKB) and dynorphin. They are involved in the negative feedback of gonadotropin-releasing hormone (GnRH) release in the
KNDy_neuron
Part of the neuroendocrine system
until levels in the blood return to normal. Thyroid hormone exerts negative feedback control over the hypothalamus as well as anterior pituitary, thus
Hypothalamic–pituitary–thyroid axis
Hypothalamic–pituitary–thyroid_axis
Control loop feedback mechanism
proportional–integral–derivative (PID) controller, or three-term controller, is a feedback-based control loop mechanism commonly used to manage machines and processes
PID_controller
Human biochemical pathway
give a response to the signal. Feedback mechanism might involve negative and positive feedbacks. In the negative feedback, the pathway is inhibited and
Insulin signal transduction pathway
Insulin_signal_transduction_pathway
Branch of engineering and mathematics
S. Black invented the concept of negative feedback amplifiers in 1927. He managed to develop stable negative feedback amplifiers in the 1930s. Harry Nyquist
Control_theory
Electrical circuit
junction (either from a diode or bipolar junction transistor) as negative feedback to compute the logarithm. Multistage log amplifiers instead cascade
Log_amplifier
amplifiers have several applications, optimised for use with negative feedback. When positive feedback is required, a comparator is usually more appropriate;
Operational amplifier applications
Operational_amplifier_applications
Control that boosts the upper mid-range audion frequencies
amplifier's negative-feedback loop. As the level of "presence" was increased, so more and more of the higher frequencies in the negative-feedback loop were
Presence_(amplification)
Graphical method of determining the stability of a dynamical system
part of every pole must be negative. If T ( s ) {\displaystyle {\mathcal {T}}(s)} is formed by closing a negative unity feedback loop around the open-loop
Nyquist_stability_criterion
Relationship between biological organs
in both the negative and positive feedback mechanisms of estrogen on GnRH secretion, with ARC kisspeptin neurons mediating negative feedback and AVPV/POA
Hypothalamic–pituitary–gonadal axis
Hypothalamic–pituitary–gonadal_axis
Gonadotropin secreted by the adenohypophysis
preovulatory LH surge was attributed to a decrease in estrogen-mediated negative feedback of GnRH in the hypothalamus, subsequently stimulating the release
Luteinizing_hormone
2021 video game
delayed in August 2020 after its gameplay reveal in July 2020 drew negative feedback from both critics and Halo fans. Following an open beta release of
Halo_Infinite
Figure of merit for amplifiers
which the amplifier gain is at least 1). For an amplifier in which negative feedback reduces the gain to below the open-loop gain, the gain–bandwidth product
Gain–bandwidth_product
2026 American film
rating of 5.40/10. Robert Kojder of Flickering Myth gave the film a negative feedback and a rating of 2 out of 5 and he wrote: It’s better than some recent
Above_&_Below
Essential nutrient
the precursor 7-dehydrocholesterol synthesized in the skin and a negative feedback in the kidney wherein the presence of calcitriol induces diversion
Vitamin_D
Concept in game design
negative feedback processes, and therefore decreasing the power of positive feedback processes has the same effect as introducing negative feedback processes
Game_balance
Measure of how a closed loop transfer function is affected by parameter changes
closed loop control system written in the Laplace domain using unity negative feedback. The closed-loop transfer function is given by T ( s ) = G ( s ) C
Sensitivity_(control_systems)
Unity gain amplifier with low output impedance
gain buffer amplifier may be constructed by applying a full series negative feedback (Fig. 2) to an op-amp simply by connecting its output to its inverting
Buffer_amplifier
Type of electronic circuit
since at these frequencies feedback oscillators perform poorly due to excessive phase shift in the feedback path. In negative-resistance oscillators, a
Electronic_oscillator
2026 film by Yeon Sang-ho
hit hard enough. Brian Tallerico of RogerEbert.com gave the film a negative feedback and he said: Maybe Sang-ho needed the confined space of a train to
Colony_(2026_film)
Operon that codes for the components for production of tryptophan
additionally uses attenuation to control expression of the operon, a second negative feedback control mechanism. The trp operon is well-studied and is commonly
Trp_operon
American geneticist and chronobiologist (born 1945)
unknown, Hall, Rosbash, and Hardin were able to develop a negative transcription-translation feedback loop model (TTFL) that serves as a central mechanism
Jeffrey_C._Hall
Topics referred to by the same term
resolution in policy debate Negative feedback, a feedback loop that responds in the opposite direction to a perturbation Negative liberty, freedom from interference
Negative
Flow graph invented by Claude Shannon
See Kou page 57. A possible SFG for the asymptotic gain model for a negative feedback amplifier is shown in Figure 3, and leads to the equation for the
Signal-flow_graph
Condition determining when a linear electronic circuit will oscillate
general negative feedback circuits such as op amps, to prevent them from oscillating. Barkhausen's criterion applies to linear circuits with a feedback loop
Barkhausen stability criterion
Barkhausen_stability_criterion
Development of an action plan in order to achieve a goal
providing feedback. Goal setting can lead to the creation of feedback loops, either negative or positive comparison of the output to the goal. Negative feedback
Goal_setting
Audio amplifier with power output sufficient to drive a loudspeaker
often leads to undesirable increases in noise and distortion. While negative feedback actually reduces the gain, it also reduces distortion. Most audio
Audio_power_amplifier
Cell therapy technology applications
psoriasis biomarkers. Circuit logic also allows for the assembly of negative feedback within therapeutic cells. In diseases where tight homeostatic regulation
Applications of synthetic gene circuits in drug delivery
Applications_of_synthetic_gene_circuits_in_drug_delivery
Use of various control systems for operating equipment
despite disturbances. This closed-loop control is an application of negative feedback to a system. The mathematical basis of control theory began in the
Automation
Patterns of behavior of a system
reaction is called feedback. There are two types of feedback – reinforcing feedback and balancing feedback. Sometimes a feedback (or a reaction) does
System_archetype
Time behavior of a system controlled by Heaviside step functions
amplifier, and upon the amount of feedback used. A negative-feedback amplifier has gain given by (see negative feedback amplifier): A F B = A O L 1 + β
Step_response
Control system for the motion of a mechanical system
and improve dynamic response. In closed-loop control, error-sensing negative feedback is used to correct the action of the mechanism. In displacement-controlled
Servomechanism
Practice in the field of learning and achievement
Corrective feedback is a frequently-used practice in the field of learning and achievement. It typically involves a learner receiving either formal or
Corrective_feedback
James Nunn 2026 horror/action film
audience’s cavernous mouth. Brian Orndorf of Blu-ray.com gave the film a negative feedback and a rating of 5 out of 10 and wrote: "Hungry" has a few technical
Hungry_(film)
Precision differential amplifier with input buffering
the buffer inverting inputs and ground to shunt away some of the negative feedback; however, the single resistor R gain {\displaystyle R_{\text{gain}}}
Instrumentation_amplifier
Generalized belief about people
black subjects mistrusted the feedback, attributing negative feedback to the evaluator's stereotypes and positive feedback to the evaluator's desire to
Stereotype
Process of creating equivalent circuits
ground, bootstrapping, negative impedance, etc.) and help in designing and understanding various commonplace circuits (feedback amplifiers, resistive and
Miller_theorem
Property that an increasing voltage results in a decreasing current
positive feedback can have negative differential resistance. These are used in oscillators and active filters. Because they are nonlinear, negative resistance
Negative_resistance
Audio amplifier based on switching
effective way to combat errors, regardless of their source, is negative feedback. A feedback loop including the output stage can be made using a simple integrator
Class-D_amplifier
Swedish-American physicist (1889–1976)
"Inventing the negative feedback amplifier". IEEE Spectrum. 14 (12): 54–60. Kline, Ronald R. (August 1993). "Harold Black and the negative-feedback amplifier"
Harry_Nyquist
American online streamer (born 2005)
to testosterone injections, Peters explained: “So it’s just like a negative feedback loop when you’re not needing to produce testosterone anymore because
Clavicular_(influencer)
Endocrine gland
of all steroidogenic P450 enzymes. The HPA axis is an example of a negative feedback system, in which cortisol itself acts as a direct inhibitor of both
Adrenal_gland
Electric circuit that generates sine waves
interested in Harold Stephen Black's work on negative feedback, so he held a graduate seminar on negative feedback. Bill Hewlett attended the seminar. Scott's
Wien_bridge_oscillator
Interrelated entities that form a whole
Social Concepts Doubling time Leverage points Limiting factor Negative feedback Positive feedback Theoretical fields Control theory Cybernetics Earth system
System
Attempt made by investors to avoid negative financial information
of potentially negative but useful information, to prevent psychological discomfort. For example, a person may avoid looking at feedback on a project.
Ostrich_effect
Electronic control system
placed in a negative feedback configuration. A digital phase-locked loop uses a digital phase detector; it may also have a divider in the feedback path or
Phase-locked_loop
British motoring TV show (2002–2022)
were joined by four co-presenters for the twenty-third series. After negative feedback on this series, Evans resigned from the programme, with LeBlanc joined
Top_Gear_(2002_TV_series)
Psychological theory
control theory (PCT) is a model of behavior based on the properties of negative feedback control loops. A control loop maintains a sensed variable at or near
Perceptual_control_theory
Form of marketing focused on creating content for a targeted audience online
messages have on consumers. Brand health refers to the positive or negative feedback that a company gets. It also measures how important a brand is for
Content_marketing
Study of non-linear complex systems
updating all variables in small time increments with positive and negative feedbacks and time delays structuring the interactions and control. The best
System_dynamics
Target value for the process variable of a control system
from its setpoint is one basis for error-controlled regulation using negative feedback for automatic control. A setpoint can be any physical quantity or
Setpoint_(control_system)
Glands of the endocrine system that secrete hormones to blood
thyroid gland. Thyrotropin-releasing hormone stimulates its release; negative feedback of thyroid hormone inhibits it. Adrenocorticotropic hormone stimulates
Endocrine_gland
Class of electronic circuit
switching bipolar junction transistor (BJT) by applying a nonlinear negative feedback through various kinds of diodes. The reason for slow turn-off times
Baker_clamp
Molecule that blocks enzyme activity
the production of molecules that are no longer needed. This type of negative feedback is an important way to maintain balance in a cell. Enzyme inhibitors
Enzyme_inhibitor
Type of protein, regulators of signalling pathways
cell, regulating signal transduction by coordinating positive and negative feedback signals, and insulating correct signaling proteins from competing
Scaffold_protein
Electrical circuit
has a high impedance differential input stage and may be used with negative feedback. But the OTA differs in that: The OTA outputs a current while a standard
Operational transconductance amplifier
Operational_transconductance_amplifier
Analog multiplexing technique used in early telephone systems
operation depended on negative-feedback amplifiers, developed from work by H. S. Black. Bell Labs later described negative feedback as a key prerequisite
Carrier_telephony
Endocrine disorder
The negative feedback loop for glucocorticoids
Addison's_disease
Topics referred to by the same term
particularly methods such as 360-degree feedback Biofeedback Climate change feedback, for positive and negative feedbacks associated with climate change Reinforcement
Feedback_(disambiguation)
City-building and real-time strategy video game series introduced in 1993
game's closed beta was abruptly shut down by Ubisoft in light of negative feedback, the game was removed from the release schedule. It was ultimately
The_Settlers
children to be able to even use implicit direct negative evidence, they would need to receive negative feedback on a sentence 85 times in order to eliminate
Negative evidence in language acquisition
Negative_evidence_in_language_acquisition
Type of transistor amplifier
the control of negative feedback. From this viewpoint, a common-collector stage (Fig. 1) is an amplifier with full series negative feedback. In this configuration
Common_collector
Communication with oneself
phenomena influence each other in various ways. For example, positive and negative feedback received from other people affects how a person talks to themself
Intrapersonal_communication
Valve amplifier designed by David Theodore Nelson Williamson
with an additional error amplifier stage and a global negative feedback loop. Deep feedback, triode-connected KT66 power tetrodes, conservative choice
Williamson_amplifier
American punk rock band
Depression, Mumble Something - 7-inch EP Pigs are People Too (1995), Negative Feedback Peel Sessions - BBC Radio One (2003), Very Necessary "The Awakening"
Fitz_of_Depression
Recovery period after orgasm before another is possible
autonomic signals sent from these organs, effectively creating a negative feedback loop. Such a mechanism is similar to decreased gastric and bowel motility
Refractory_period_(sex)
Chemical compound
the estrogen receptor (ER) in the pituitary gland, which reduces negative feedback by estrogen on the hypothalamic-pituitary-gonadal axis, thereby increasing
Enclomifene
Amplifier design technique
amplifiers employing negative feedback. It usually has two primary goals: To avoid the unintentional creation of positive feedback, which will cause the
Frequency_compensation
British carvery chain
literature. The new revamps in the late 1990s were often met with negative feedback from local council planning committees, as the interior design would
Toby_Carvery
2026 American film
vetting corporations. Brian Tallerico of RogerEbert.com gave the film a negative feedback and wrote: It wades into the increasingly crowded genre of how the
Monitor_(film)
travel, tourism, insurance
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travel, tourism, insurance