Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Pulse multiplication or division
Patent
1995-06-06
1996-11-05
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Pulse multiplication or division
377105, 377117, 377121, 327115, H03K 2354, H03K 2100
Patent
active
055725619
ABSTRACT:
A frequency dividing circuit includes a first inverter circuit supplied with a first frequency-divided signal, a second inverter circuit supplied with a second frequency-divided signal which has a complementary relationship to the first frequency-divided signal, and a first pair of push-pull circuits. There are also provided a first switch circuit performing a first switching operation in response to a first input signal and selectively supplying output signals of the first and second inverter circuits to the first pair of push-pull circuits so that one of the first pair of push-pull circuits performs a pull-up operation when the other one thereof performs a pull-down operation. Further, there are provided a second pair of push-pull circuits, and a second switch circuit performing a second switching operation in response to a second input signal which has a complementary relationship to the first input signal and selectively supplying output signals of the first pair of push-pull circuits to the second pair of push-pull circuits so that one of the second pair of push-pull circuits performs a pull-up operation when the other one thereof performs a pull-down operation. The first and second frequency-divided signals are output from the second pair of push-pull circuits.
REFERENCES:
patent: 3829713 (1974-08-01), Canning
patent: 4020362 (1977-04-01), Suzuki et al.
patent: 5131018 (1992-07-01), McAdams et al.
patent: 5227674 (1993-07-01), Takahashi et al.
Kubota Miki
Usami Kunihiro
Fujitsu Limited
Heyman John S.
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