High speed, low power high common mode range voltage mode differ

Details High speed, low power high common mode range voltage mode differ High speed, low power high common mode range voltage mode differ

1993-11-12

1994-08-16

Wambach, Margaret Rose

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307446, 3073172, 307544, 307547, H03K 301, H03K 1902

Patent

active

053389875

ABSTRACT:
A BiCMOS output driver for a transceiver circuit has a pull-up/pull-down circuit with CMOS transistors supplying base current to bipolar pull-up/pull-down transistors. In its quiescent state, the CMOS transistors draw no current. A current mirror circuit comprising a pair of bipolar transistors sized to be a fraction of the pull-up/pull-down transistors is coupled between the input and output of the pull-up/pull-down circuit to prevent exceeding a predetermined current. A speed up circuit comprising CMOS transistors coupled between ground and the base of the bipolar pull-up/pull-down transistors to speed up the shut off of the transistors.

REFERENCES:
patent: 5027009 (1991-06-01), Urakawa et al.
patent: 5140190 (1992-08-01), Yoo et al.

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