Current-driven signal interface implemented in semiconductor int

Details Current-driven signal interface implemented in semiconductor int Current-driven signal interface implemented in semiconductor int

1992-03-30

1994-11-08

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Including specified plural element logic arrangement

36518901, G11C 800, H01L 2706

Patent

active

053633326

ABSTRACT:
A semiconductor integrated circuit device is arranged to have a plurality of logic circuit blocks, a data signal path for interconnecting logic circuit blocks and for providing a function of interfacing a current-driven signal. The logic circuit block on a signal output side includes an output circuit connected to the data signal path and a switching element formed of an NMOS transistor for controlling current flowing through the data signal path in response to an input signal applied to an input terminal of the output circuit. The logic circuit block on a signal input side includes an input circuit connected to the data signal path. The input circuit includes a bipolar transistor having an emitter connected to a constant current source, a collector forming an output terminal, and a base set at a fixed potential. The data signal path led from the output circuit is connected to the emitter of the bipolar transistor. The arrangement results in reducing a signal amplitude on the signal bus, thereby speeding up the transmission of the data signal and reducing noise of the signal.

REFERENCES:
N. Weste et al., "Principles", Chapter 8 CMOS Subsystem Design, pp. 320-325, published 1985.

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