System for demodulating angle-modulated signals

摘要: The inventive system demodulates angle-modulated signals. A tracking band-pass filter responds to an input wave signal. has a pass band with center frequency controlled by control first amplitude limiter limits the of differentiation circuit establishes 90° phase difference between signal passing through and limiter. comparator two signals therebetween produces output error in accordance this difference. This is supplied as filter. also passed low obtain demodulated