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A circuit in which magnitude and polarity of the output voltage depend on how an input signal differs from a standard or from another signal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a device that transforms a change in a control parameter of an electrical signal (at the input) into a change in the voltage (at the output).

In a discriminator the values of a parameter (amplitude, duration, polarity, frequency, and phase) of an input signal are compared to a selected (nominal) value of the parameter of a separate (reference) signal source. As a result of the comparison, a difference (misalignment) voltage arises at the output of the discriminator. Its amplitude and polarity are determined by the degree and sign of deviation of the value of the given parameter of the input signal from the nominal signal.

Discriminators are classified according to the signal parameters being compared. A pulse-height discriminator has a set triggering level and passes only signals with an amplitude higher (lower) than the nominal value. When the input and reference impulse signals coincide in time, the signal appears at the output of a time discriminator constructed as a coincidence circuit and disappears at the output of a discriminator constructed as an anticoincidence circuit. In frequency and phase detection the variations of high-frequency frequency- and phase-modulated oscillations are transformed by the discriminator into amplitude-modulated oscillations, which in most cases are then delivered to a detector. In this case, a reference signal with a fixed initial phase is used in the phase discriminator. Discriminators are used in systems for automatic control of automation and remote-control devices, in frequency and phase detectors of radio receivers, in devices in nuclear physics, and in measurement technology.


Radiopriemnye ustroistva, part 2. Moscow, 1963.
Frolkin, V. T. Impul’snye ustroistva, 2nd ed. Moscow, 1966.
Gonorovskii, I. S. Radiotekhnicheskie tsepi i signaly, part 2. Moscow, 1967.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Item No 2###26###0.44###Medium to Moderately difficult###0.56###Excellent Discriminator
And, isn't that a discriminator which should be strongly weighted as a benefit to Canada and ultimately the Canadian Armed Forces when considering through-life support et al?
A discriminative network is trained to distinguish the generated samples from the real ones, while the generative network intends to produce realistic samples to fool the discriminator. GANs are just right for diverse image-to-image translation since only images that are plausible enough would be accepted by the trained discriminator despite specific applications.
As the SSAC members transferred sticky notes from Board 1 to Board 2, they discussed the relative importance of each discriminator and placed it in the agreed-to order of importance on the continuum.
In the proposed joint VPLL, we add a vector phase lock loop in addition to the conventional PLLs dedicated to individual channels as shown in Figure 1.The vector loop uses the outputs of all channels discriminator as measurements to estimate the position and clock bias prediction error in the EKF block.
These examples reveal that in certain circumstances, discriminators need information to discriminate.
It is acknowledged that accurate triage is compromised when using EWSs without considering clinical discriminators such as purpuric rash and dehydration.
A discriminator based on Bayesian decision rule is designed using the sequential aspect features (SAF) which consists of sparse TF atoms.
Those participants showing positive values were considered as ZM discriminators. Complementarily, CS difference scores were calculated by substracting the average CS activity in the presence of happy faces from the average CS activity in the presence of angry faces.
Launch a campaign to out the discriminators? Start a Battered Old Facebook petition to bring in legislation?
"The clinical implications are that physicians should choose strategic programming, including increasing VT/VF detection rates and duration thresholds, and turning on SVT discriminators and ATP for fast VTs," he stressed.