| 摘要 |
PURPOSE:To reduce the beat of an edge due to reflection of a 0 frequency by shifting a phase difference of an output of a phase shift circuit from 90 deg. while performing quadruple demodulation basically and adjusting each amplitude in synthesizing each demodulation output. CONSTITUTION:The output phase difference is shifted by 90 deg. by adjusting capacitors 54, 55 of the phase shift circuit 53. Limiters 56-59 give an inverting/noninverting output delayed slightly, exclusive OR circuits 60-63 detect the edge of the pulse so as to output an output for quadruple processing. Resistors 64-67 are resistors for synthesis and the resistance value is adjusted so as to zero the beat component of the edge. |
