Comparator capable of preventing large noise voltage

Details Comparator capable of preventing large noise voltage Comparator capable of preventing large noise voltage

1994-02-17

1995-12-19

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 63, 327 53, H03K 522

Patent

active

054771706

ABSTRACT:
A first field effect transistor has a drain electrode connected to a first current input terminal of a first current mirror circuit and a gate electrode connected to a first voltage input terminal which is supplied with a first voltage input terminal. A second field effect transistor has a drain electrode connected to a first current output terminal of the first current mirror circuit and a gate electrode connected to a second voltage input terminal which is supplied with a second input voltage. A second current mirror circuit has a second current input terminal connected to the first current output terminal and a second current output terminal connected to a power terminal through a resistor and to a voltage output terminal which is supplied with an output voltage. A comparator may include third and fourth current mirror circuits instead of the first and the second field effect transistors. In this event, the third current mirror circuit has a third current input terminal supplied with a first input current and a third current output terminal connected to the first current input terminal. The fourth current mirror circuit has a fourth current input terminal supplied with a second input current and a fourth current output terminal connected to the first current output terminal.

REFERENCES:
patent: 4047059 (1977-09-01), Rosenthal
patent: 4529891 (1985-07-01), Oida
patent: 4618785 (1986-10-01), van Tran
patent: 4812681 (1989-03-01), Pumphrey
patent: 5136184 (1992-08-01), Deevy
patent: 5189318 (1993-02-01), Tanaka
Technical Study Report in the Transactions of the Institute of Electronics, Information and Communication Engineers, ICD 89-115, vol. 89, No. 205, Sep. 1989, pp. 25-31. No Translation.

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