Gain control circuit for a linear power amplifier

Amplifiers – With semiconductor amplifying device – Including differential amplifier

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

330149, 455126, H03F 345

Patent

active

059125888

ABSTRACT:
The invention relates to the gain control of radio amplifiers. In an amplifier circuit according to the invention, the employed output level is a differential pair provided with a tanh.sup.-1 predistorter as a control device. The predistortion is adjusted so that the differential pair operates all the time in the linear region, when the bias current I.sub.E and the transconductance of the pair are changed. By using the amplifier circuit according to the invention, there is achieved linear operation within a wide range of output power.

REFERENCES:
patent: 5091919 (1992-02-01), Kuisma
patent: 5123031 (1992-06-01), Kuisma
patent: 5204881 (1993-04-01), Cardini et al.
patent: 5256984 (1993-10-01), Lee
patent: 5258722 (1993-11-01), Jeffers
patent: 5289136 (1994-02-01), DeVeirman et al.
patent: 5598127 (1997-01-01), Abbiati et al.
IEEE Journal of Solid-State Circuits, vol. 26, No. 11, pp. 1673-1680, Nov. 1991, "A DC To 1-GHz Differential Monolithic Variable-Gain Amplifier", Meyer et al.
IEEE Transactions on Microwave Theory and Techniques, vol. 41, No. 12, pp. 2295-2302, Dec. 1993, "Monolithic GaAs HBT p-i-n Diode Variable Gain Amplifiers, Attenuators, and Switches", Kobayashi et al.
IEEE Journal of Solid-State Circuits, vol. 29, No. 10, pp. 1257-1261, Oct. 1994, "GaAs HBT 0.75-5 GHz Multifunctional Microwave-Analog Variable Gain Amplifier", Kobayashi et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Gain control circuit for a linear power amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gain control circuit for a linear power amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gain control circuit for a linear power amplifier will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-404934

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.