cancellation circuit

cancellation circuit

[kan·sə′lā·shən ‚sər·kət]
(electronics)
A circuit used in providing moving-target indication on a plan position indicator scope; cancels constant-amplitude fixed-target pulses by subtraction of successive pulse trains.
References in periodicals archive ?
The dark current in Ptsi detectors can be multiples of the photo current especially temperatures at higher than 77 [degrees]K , so the dark current cancellation circuit is added before the integration stage to increase the dynamic range of the readout channel.
A common mode noise cancellation circuit, comprising of one or more switching devices to receive DC voltage; -- A low-loss, low noise triac enabled multiplying circuit to receive an AC input and a DC firing signal; -- An AC to DC power supply; -- A method to cancel common mode noise by generating a common mode noise waveform from one or more switching devices, transmitting the common mode noise waveform to a transformer in a circuit and creating a common mode cancellation waveform.
It also has an optional resistor capacitor noise cancellation circuit with the added benefit of alternative shield configurations for improving system compliance to worldwide electromagnetic compatibility (EMC) standards.
Connection to the four-wire S0 basic access is enabled by the ISDN Subscriber Access Controller (ISAC-S TE, designated PSB2186), while the ISDN Echo Cancellation Circuit (IEC-Q, designated PEB2091) provides access to ISDN two-wire U2B1Q interfaces.
With the largest installed base of echo cancellation circuits worldwide and more than 25 years of experience, the Tellabs VQE series eliminates both hybrid and acoustic echo, automatically adjusts audio levels and reduces background noise.
With the largest installed base of echo cancellation circuits worldwide and over 25 years' experience, the Tellabs VQE series eliminate echo, automatically adjust audio levels and reduce background noise.
Tellabs has the largest installed base of echo cancellation circuits in the world with more than 300 customers in over 70 countries including every major wireline and wireless service provider.