Self timed register file having bit storage cells with emitter-c

Details Self timed register file having bit storage cells with emitter-c Self timed register file having bit storage cells with emitter-c

1989-02-03

1992-04-21

Shaw, Gareth D.

Static information storage and retrieval

Read/write circuit

Multiplexing

36518905, 36518911, G06F 1200

Patent

active

051074621

ABSTRACT:
A self time register (STREG) 44 is constructed on a single custom ECL integrated circuit and has provisions for generating its own internal clock signal. The STREG 44 includes a set of latches 80a-80q for temporarily storing the data delivered thereto concurrent with the system clock pulse. Thereafter, the internally generated clock pulse (W.sub.PULS) controls the write operation of the temporary latches into the STREG 44. The STREG has data storage registers including bit storage cells which receive the data in response to the internally generated clock pulse. To selectively output the data, the bit storage cells have emitter-coupled output selectors, and the output selectors for common bits share a common current sink and a common pull-up resistor at which a single-bit output signal is provided from a selected register. Preferably, each bit storage cell has a first output selector for a first data output port, and a second output selector for a second data output port. By sharing of a common pull-up resistor and a current sink for each bit position of each output port, an economy of components can be realized.

REFERENCES:
patent: 4623990 (1986-11-01), Allen et al.
patent: 4663741 (1987-05-01), Reinschmidt et al.
patent: 4712190 (1987-12-01), Guglielmi et al.
patent: 4933909 (1990-06-01), Cushing et al.

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