Precision current rectifier for rectifying input current

Details Precision current rectifier for rectifying input current Precision current rectifier for rectifying input current

1987-01-28

1988-05-17

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

307270, 307288, 323315, 340347M, 363127, H03M 144

Patent

active

047453958

ABSTRACT:
A current rectifier is provided and generally comprises: a p-channel transistor and an n-channel transistor having common gates connected to ground and common sources connected to an input current I.sub.in ; and a first current mirror with its input connected to the drain of the n-channel transistor, and its output connected to the drain of the p-channel transistor. The current rectifier preferably also includes a second current mirror with the drain of the p-channel transistor as an input to the second current mirror and the rectified output current I.sub.out as an output of the second current mirror. If an offset to the rectified current is desired, a third current mirror having a bias or offset current as an input and the output of the second current mirror as an output may be included.

REFERENCES:
patent: 4445053 (1984-04-01), Jaeger et al.
patent: 4495425 (1985-01-01), McKenzie
Dewitt et al, Transistor Electronics, McGraw-Hill Book Company, Inc., 1957, pp. 200-203.

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