Multiphase CMOS toggle flip-flop

Details Multiphase CMOS toggle flip-flop Multiphase CMOS toggle flip-flop

1987-03-09

1989-02-14

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307452, 3072722, H03K 326, H03K 3284, H03K 19096

Patent

active

048048640

ABSTRACT:
A simplified CMOS toggle flip-flop includes a flip-flop that has an input and an output, and a toggle circuit that includes an inverter having an input connected to the flip-flop output, a transfer switch connected between the inverter output and the flip-flop input, and a toggle control responsive to an input toggle signal for closing the transfer switch to connect the inverter output to the flip-flop input to transfer the inverted flip-flop output state to the flip-flop input. The transfer switch may include an NFET having its conduction path connected between the inverter output and the flip-flop input, and having a control gate. The toggle control may include a NAND gate having a first input for receiving a toggle pulse and a second input for receiving a timing pulse, and having an output. A second inverter has an input connected to the NAND gate output and an output connected to the NFET control gate of the transfer switch.

REFERENCES:
patent: 4181862 (1980-01-01), Dingwall
patent: 4275316 (1981-06-01), Knapp
patent: 4433357 (1984-02-01), Nishimura et al.
patent: 4484087 (1984-11-01), Mazin et al.
patent: 4506167 (1985-03-01), Little et al.
patent: 4669101 (1987-05-01), McCombs
patent: 4680491 (1987-07-01), Yokouchi et al.
patent: 4691122 (1987-09-01), Schnizlein et al.

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