chopper amplifier

chopper amplifier

[′chäp·ər ′am·plə‚fī·ər]
(electronics)
A carrier amplifier in which the direct-current input is filtered by a low-pass filter, then converted into a square-wave alternating-current signal by either one or two choppers.
References in periodicals archive ?
developed a switched-capacitor chopper-notch modulator for replica image cancelation in chopper amplifiers [21].
Two self-correcting auto-zero chopper amplifiers are included for a complete analog solution, but if digital PID control is desired, the output of chopper 1 can feed a microcontroller analog-to-digital converter (ADC).