Output circuit with short circuit protection for a CMOS comparat

Details Output circuit with short circuit protection for a CMOS comparat Output circuit with short circuit protection for a CMOS comparat

1994-08-24

1996-06-11

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327309, 327380, H03K 508

Patent

active

055259340

ABSTRACT:
An output stage of a CMOS comparator is designed to have a limited short circuit current, while maintaining maximum output voltage swing and a low quiescent current. The output stage includes a reference voltage generation circuit, which generates a gate voltage at the output transistor of limited range, so that the short circuit current of the output transistor is limited. In one embodiment, the reference voltage is generated by a plurality of serially connected diodes.

REFERENCES:
patent: 4713600 (1987-12-01), Tsugaru et al.
patent: 4996443 (1991-02-01), Tateno
patent: 5287517 (1994-02-01), Maskas et al.
patent: 5399915 (1995-03-01), Yahata
Excerpt from book entitled "Bipolar and MOS Analog Integrated Circuit Design" by Alan B. Grebene, Micro-Linear Corporation, John Wiley & Sons, 1984, pp. 258-260.
Article entitled "A Quad CMOS Single-Supply Op Amp with Rail-to -Rail Output Swing", by Dennis M. Monticelli, IEEE Journal, vol. SC-21, No. 6, Dec. 1986, pp. 1026-1034.

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