Dynamic flip-flop with static reset
AssigneeSanders Associates, Inc.
InventorsErnest E. Hollis, Joseph H. Born
Life of this patent
Estimating the term…
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AssigneeSanders Associates, Inc.
InventorsErnest E. Hollis, Joseph H. Born
Estimating the term…
A D-type flip-flop (10) receives the D input on an input line (14) of a transfer gate (12) that also receives the flip-flop clock signal. A state gate (20) forwards the transmission-gate output when the signals on two of its input lines (22) and (24) remain true. To reset the flip-flop asynchronously, a false signal is imposed on one of the input lines (22) of the state gate (20). By coordination of a second clock signal, which is applied to a second transmission gate (34), with the reset signal, the reset condition is held until the next clock pulse on the first transmission gate (12). The flip-flop ordinarily operates as a dynamic circuit, but, in order to maintain the reset condition in circumstances in which the reset state is to be maintained for an extended period of time, a latch gate (26) is enabled by a true signal on one of its input lines (32) to feed the reset output of the state gate 20 to one of its input terminals (24 ) so as to latch the flip-flop in the reset state.
An asynchronously resettable high-speed dynamic flip-flop comprising:
Dependencies are inferred from the claim text.