Voltage comparator requiring no compensating offset voltage

Details Voltage comparator requiring no compensating offset voltage Voltage comparator requiring no compensating offset voltage

1995-04-21

1997-04-29

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 77, 327 94, H03K 522, G11C 2702

Patent

active

056253044

ABSTRACT:
A method and apparatus is provided for comparing a first input voltage to a second input voltage. In one embodiment of the invention, a first input voltage is transformed into a first current flowing through a first transistor and a second transistor. A second input voltage is transformed into a second current flowing through the first transistor while the first current continues flowing through the second transistor. A difference current is developed which represents the difference between the first current and the second current. An indicator signal is generated which indicates the larger of the first and second input voltages based on the value of the difference current.

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patent: 5162671 (1992-11-01), Ishihara
patent: 5247210 (1993-09-01), Swanson
"Dynamic Analog Techniques", E.A. Vittoz, Design of MOS VLSI Circuits For Telecommunications, Chapter 5, edited by Y. P. Tsividis and P. Antognetti, Prentice Hall, 1985.

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