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Abstract

This frequency multiplier circuit with variable multiplication order is of the type comprising a comb generator that receives, at input, a signal at the base frequency to be multiplied, and gives, at output, a composite pulse signal having a plurality of harmonic lines of the base frequency, said comb generator being followed by a pass-band filter that can be tuned selectively to one of these harmonic lines. The comb generator is formed by logic means having two complemented outputs, a synchronous input, the actuation of which controls the changing of these outputs from one logic state to the other, and a asynchronous input, the actuation of which controls, independently of the state of the synchronous input, the changing of these outputs to the states complementary to those generated by the actuation of the synchronous input. The base frequency signal is biased beforehand so that its excursion takes place around the transition voltage controlling the change from one logic state to the other, said signal being applied to the synchronous input of the logic means, and a first output of these means is connected to asynchronous input and the second output delivers said composite pulse signal to the the pass-band filter.

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First Claim