Communications system using power amplifier with dynamic biasing

Details Communications system using power amplifier with dynamic biasing Communications system using power amplifier with dynamic biasing

1996-12-27

2000-09-19

Nguyen, Lee

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

455 69, 455126, 455522, 330134, 330285, H04B 104

Patent

active

06122491&

ABSTRACT:
In a communications system, a power amplifier is dynamically biased in response to a control signal indicative of the required transmission power. In delivering relatively high transmission power, the DC operating point of an amplifying element in the power amplifier is placed far from the cutoff and saturation regions of the output characteristics of the amplifying element. As a result, the corresponding input signal at a high drive level to the power amplifier is virtually undistorted thereby and, at the same time, a high power efficiency is achieved. In delivering relatively low transmission power, although the DC operating point is placed relatively close to the cutoff region of the output characteristics of the amplifying element, because of the corresponding input signal which is at a low drive level, the power amplifier minimally distorts the input signal. However, a high power efficiency is maintained because the input DC power to the power amplifier is reduced as well as the transmission power.

REFERENCES:
patent: 5136257 (1992-08-01), Reading
patent: 5212823 (1993-05-01), Fujii et al.
patent: 5420536 (1995-05-01), Faulkner et al.
patent: 5452473 (1995-09-01), Weiland et al.
patent: 5455968 (1995-10-01), Pham

Affiliated with

Also associated with

Rating

Communications system using power amplifier with dynamic biasing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Communications system using power amplifier with dynamic biasing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communications system using power amplifier with dynamic biasing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1082315