| 摘要 |
There is disclosed a constitution in an FM demodulator of a delay detection system for solving a problem that a demodulated signal is distorted because of a dragging or undershoot in an output pulse of an AND gate for outputting a logical product, the FM demodulator comprising: a limiter circuit which responds to an inputted FM signal; a delay circuit which delays one of two outputs; an AND gate into which another output of the limiter circuit and an output of the delay circuit are inputted; and a low-pass filter 4 into which an output of the AND gate is inputted, wherein tilted frequency characteristics are imparted to group delay of the delay circuit, the group delay frequency characteristics impart nonlinearity to fV characteristics, the fV characteristics are thereby inversely corrected, and linearity is improved.
|
