Idle current correcting circuit and low voltage drive type elect

Details Idle current correcting circuit and low voltage drive type elect Idle current correcting circuit and low voltage drive type elect

1997-06-10

1999-09-07

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307125, 307113, H01H 3500

Patent

active

059491590

ABSTRACT:
An idle current supplying path is switched during correction operation and during normal operation to detect a magnitude of an idle current flowing through a power amplifying circuit when the correction operation is switched. A bias voltage of the power amplifying circuit is corrected based upon the idle current detecting result. The bias voltage is automatically corrected in such a manner that the magnitude of the idle current flowing through the power amplifying circuit is made coincident with a predetermined current value. As a consequence, the idle current flowing through the respective power amplifying circuit can be continuously maintained to the optimum values respective of to the element deviation.

REFERENCES:
patent: 4785295 (1988-11-01), Fukui et al.
patent: 5406225 (1995-04-01), Iida et al.
patent: 5432473 (1995-07-01), Mattila et al.

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