| 摘要 |
A phase comparator circuit arrangement is provided for controlling an electrical member on the basis of a control signal formed in accordance with the difference detected between a first waveform which is periodic and has a constant cyclic ratio, after it has locked on to a reference signal, and a second waveform which, after this locking on for which it serves as a reference, becomes non-periodic with a variable cyclic ratio for the purposes of exerting the said control. The circuit comprises a combination of a first bistable flip-flop circuit which receives the first and second waveforms respectively and which receives enabling voltages whose evolution is complementary between one input and the other. Means to subtract the waveform emitted by the first flip-flop circuit from the first waveform are provided to form the said signal for controlling the member. A second bistable flip-flop circuit may be included which receives, respectively, the first waveform and a third waveform which is complementary to the first, and which receives enabling voltages whose evolution is complementary from one input to the other and which, in the case of at least one of them, depend on the state of the flip-flop of the first bistable flip-flop circuit. Means for inhibiting the operation of this second bistable flip-flop circuit are included with means to add the waveform emitted by the second circuit during the control phase to the first waveform, to form the said signal for controlling the member during this control phase.
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