Power level sense circuit

Details Power level sense circuit Power level sense circuit

1997-06-13

1999-02-09

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 62, 327307, 4552262, G01R 1900, H03L 500

Patent

active

058699864

ABSTRACT:
A power level sense circuit which is substantially immune to variations in integrated circuit processing and operating temperature. The sense circuit uses a diode biased to a predetermined average conduction level as the primary element in an envelope detector to detect the envelope of the RF transmit signal. While the DC offset of the diode will vary with temperature and integrated circuit processing, the DC offset is eliminated by an auto zeroing procedure before each power sensing cycle.

REFERENCES:
patent: 4194240 (1980-03-01), Davis
patent: 4319196 (1982-03-01), Kwan
patent: 4492926 (1985-01-01), Kusakabe et al.
patent: 4630315 (1986-12-01), Watkinson
patent: 4890066 (1989-12-01), Straver et al.

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