Patent ID: 6064255
Filing Date: 2000-05-16
Classification: H03D,H03J,H04B,H04L

Abstract:
A pulse counting demodulator comprising;input differentiating means for differentiating an input frequency-modulated signal to produce a differentiated pulse signal based on the input frequency-modulated signal,monostable multivibrator means including a capacitive element for conducting an output level inverting operation by charging and discharging said capacitive element in response to a trigger signal supplied to said monostable multivibrator means in response to the differentiated pulse signal obtained from said input differentiating means,variable current source means for supplying said capacitive element with a charging current and varying the charging current in response to an externally supplied control voltage, andoutput means for obtaining a demodulation output signal having a level corresponding to the output level inverting operation in said monostable multivibrator means.