Telecommunications – Transmitter – With feedback of modulated output signal
Patent
1995-09-29
1996-09-03
Faile, Andrew
Telecommunications
Transmitter
With feedback of modulated output signal
H04B 104
Patent
active
055533183
ABSTRACT:
It is an object of the present invention to provide a transmitter which is inexpensive and small in size and is reduced in power dissipation and besides wherein the output power of a power amplifier can be varied to an arbitrary value. A phase modulator, a variable attenuator, a high power amplifier, a directional coupler, a detector, an error amplifier, a switch and an analog multiplier form an envelope feedback loop. The envelope feedback loop controls an envelope of a modulated wave detected by the detector so that a base band signal and the envelope of the modulated wave may coincide with each other. The circuits mentioned above, a smoothing circuit, another error amplifier, another switch and an adder form an operation point feedback loop. The operation point feedback loop smoothes an error of an output envelope detection signal of the detector and controls so that the smoothed error may be in the minimum.
REFERENCES:
patent: 5054116 (1991-10-01), Davidson
patent: 5208549 (1993-05-01), Andoh
Patent Abstracts of Japan, vol. 017, No. 094 (E-1325), 24 Feb. 1993 & JP-A-04 287457, Oct. 13, 1992.
Ohmagari Shinichi
Yamamoto Osamu
Faile Andrew
NEC Corporation
Vo Nguyen
LandOfFree
Transmitter having envelope feedback loop and automatic level co does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmitter having envelope feedback loop and automatic level co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmitter having envelope feedback loop and automatic level co will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1960383