Low power adjustable input threshold circuit

Details Low power adjustable input threshold circuit Low power adjustable input threshold circuit

1999-03-29

2000-12-05

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 74, 327 68, 327285, 324 74, H03K 5153

Patent

active

061572225

ABSTRACT:
A variable threshold comparator receiving, on an input node, an input signal having a voltage, and providing an output signal on an output node when the voltage of the input signal exceeds a selectable threshold voltage of the comparator. The comparator includes a transistor coupled by way of its source and drain between a power supply and an output node, and having its gate coupled to the input node. Also included are a plurality of pairs of transistors coupled together by a source of a first one of the pair of transistors and drain a drain of a second one of the pair of transistors, and coupled in series between the output node and a ground, a gate of the first one of the transistors coupled to the input node, and a gate of the second one of the transistors coupled to a control signal specific to the second one of the transistors. The threshold voltage of the comparator is selectable by the application of one or more of the control signals to a respective one or more of the second ones of said transistors.

REFERENCES:
patent: 5220216 (1993-06-01), Woo
patent: 5684423 (1997-11-01), Koyashiki et al.
patent: 5821783 (1998-10-01), Torimaru et al.

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