Low supply voltage comparator in BICMOS technology

Details Low supply voltage comparator in BICMOS technology Low supply voltage comparator in BICMOS technology

1999-08-17

2000-12-12

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327432, 330258, H03K 522

Patent

active

061604240

ABSTRACT:
A low supply voltage comparator in BICMOS technology includes: a first stage (1) with differential inputs (2,3) including, among others, two MOS transistors (MP1, MP2) of a first channel type controlling a first output bipolar transistor (T's); a second stage with differential inputs (2, 3) including, among others, two MOS transistors (MN1, MN2 (of a second channel type controlling a second output bipolar transistor (T's), the output transistors being mounted in series between two (A, M) terminals of application of respectively positive (Vdd) and negative (Vss) supply voltages; a switch (13' 13') for selecting one of the output transistors according to the common mode level of the input voltages with respect to the supply voltages; and a controller (15) for controlling the switch in all or nothing.

REFERENCES:
patent: 4554515 (1985-11-01), Burson et al.
patent: 4797631 (1989-01-01), Hsu et al.
patent: 5293136 (1994-03-01), Ryat
patent: 5455535 (1995-10-01), Sauer
patent: 5614852 (1997-03-01), Giordano et al.
patent: 5734297 (1998-03-01), Huijsing et al.

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