Power detector that employs a feedback circuit to enable class B

Details Power detector that employs a feedback circuit to enable class B Power detector that employs a feedback circuit to enable class B

1992-09-16

1995-04-04

Urban, Edward F.

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

455126, 455127, 330296, H04B 1700

Patent

active

054045851

ABSTRACT:
A power detector for detecting the magnitude of a radio frequency (RF) signal comprises a detector transistor (V1) which provides an output signal (DC-OUT) in dependence upon the input RF signal. The detector transistor is biased with a biasing circuit which comprises two transistors (V2,V3) in a feedback loop coupled to the base of the detector transistor (V1). The detector can be used as both current and voltage amplifier. One of the transistors (V3) in the feedback loop provides temperature compensation.

REFERENCES:
patent: 3708756 (1973-01-01), Fajen
patent: 4041407 (1977-08-01), Main
patent: 4319195 (1982-03-01), Matsumura
patent: 4757271 (1988-07-01), Beale
patent: 4833423 (1989-05-01), Molley
patent: 4881046 (1989-11-01), Tung
patent: 5280633 (1994-01-01), Camiade et al.

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