Linearizing circuit for dectection of a RF-power sensor

Details Linearizing circuit for dectection of a RF-power sensor Linearizing circuit for dectection of a RF-power sensor

1991-10-11

1993-05-25

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With waveguide or long line

324114, 324119, 307261, G01R 1510, G01R 2104

Patent

active

052143724

ABSTRACT:
The present invention concerns a circuit processes the power signal emitted from an RF power sensor (SK) of a radio telephone to create a detector voltage which is proportional to the power level of the radio telephone transmitter. The circuit comprises a transistor (Q2) acting as an active rectifier, which in the ascending part of the positive half cycle of the power signal charges a capacitor (C3). During the descending part of the power signal the capacitor starts to discharge with a time constant which is remarkably greater than the cycle length of the power signal. The transistor is biassed by means of a transistor (Q1) so that it is conductive even at the lowest power levels.

REFERENCES:
patent: 3329896 (1967-07-01), Groot
patent: 3838411 (1974-09-01), Van der Meer
patent: 3947706 (1976-03-01), Holmes
patent: 3962631 (1976-06-01), Poppinger
patent: 4013961 (1977-03-01), Colebourn
patent: 4065682 (1977-12-01), Evans
patent: 4132907 (1979-02-01), Davis
patent: 4333141 (1982-06-01), Nagano
patent: 4409500 (1983-10-01), Welland
patent: 4547728 (1985-10-01), Mecklenburg
patent: 4628256 (1986-12-01), Powell
patent: 4647848 (1987-03-01), Barrett
patent: 4811191 (1989-03-01), Miller
patent: 4815106 (1989-03-01), Propp et al.
patent: 4941080 (1990-07-01), Sieborger
patent: 4943764 (1990-07-01), Szente et al.
J. Hawke, "Low Offset Peak Detector Uses Transistors", Electronic Engineering, vol. 49, No. 598, p. 23 (Oct. 1977).
P. Blythin, "High Frequency Low Offset Peak Hold Circuit", IBM Technical Disclosure Bulletin, vol. 21, No. 1, pp. 349-350 (Jun. 1978).
D. G. East et al., "Universal Peak Sensing Detection and Retention Device", IBM Technical Disclosure Bulletin, vol. 7, No. 6, pp. 533-534 (Nov. 1984).
A. P. Nevezhin et al., "Wideband Linear Detector", Instruments & Experimental Techniques, vol. 30, No. 4, Part 2, pp. 894-895 (Jul./Aug. 1987).

Affiliated with

Also associated with

Rating

Linearizing circuit for dectection of a RF-power sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Linearizing circuit for dectection of a RF-power sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linearizing circuit for dectection of a RF-power sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-900066