Bipolar-CMOS digital interface circuit

Details Bipolar-CMOS digital interface circuit Bipolar-CMOS digital interface circuit

1988-04-29

1989-05-23

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307264, 307544, 307558, H03K 19092, H03K 19094, H03K 1710, H03K 1714

Patent

active

048333506

ABSTRACT:
A bipolar-CMOS (Bi-CMOS) digital interface circuit (50) of the present invention provides an interface between a bipolar digital circuit (52) and a CMOS digital circuit (54). The digital interface circuit includes a digital transform circuit (56) that receives a bipolar logic signal generated by the bipolar digital circuit and transforms the signal into an intermediate logic signal whose voltage waveform is positioned symmetrically about a logic threshold generated by a CMOS digital input circuit (58). The CMOS digital input circuit receives the intermediate logic signal and generates a CMOS logic signal that is delivered to the CMOS digital circuit, thereby to interface the CMOS digital circuit with the bipolar digital circuit.

REFERENCES:
patent: 3914702 (1975-10-01), Gehweiler
patent: 4348596 (1982-09-01), Atherton et al.
patent: 4477736 (1984-10-01), Onishi
patent: 4477737 (1984-10-01), Ulmer et al.
patent: 4504747 (1985-03-01), Smith et al.
patent: 4578600 (1986-03-01), Magee
patent: 4578602 (1986-03-01), West et al.
patent: 4647793 (1987-03-01), Davis
patent: 4719369 (1988-01-01), Asano et al.

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