Method and circuit for generating periodical output signal, whose frequency is double of that of periodical input signal, uses rectifiers of input signal and specified delayed signal respectively

摘要

A periodical output signal (11) with frequency double that of a periodical input signal (1,2) is generated by rectifying the input signal and a signal (3,4) delayed by a quarter of period duration, corresp. to that of input signal. The difference between the rectified input and delayed signals is transmitted as output signal. The delayed signal is generated from input signal by delay by a quarter of its period duration. Pref. the output signal is filtered with slight attenuation at input signal double frequency. Independent claims are included for circuit, generating output signal with double frequency to that of input signal.