Device for biasing an RF device operating in quasi-linear modes

Details Device for biasing an RF device operating in quasi-linear modes Device for biasing an RF device operating in quasi-linear modes

1992-08-20

1995-06-06

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

327575, 327482, 327483, 327530, 327535, 330289, 330296, 330297, H03K 342, H03K 1760, G05F 110, H03F 304

Patent

active

054225221

ABSTRACT:
A biasing device which is in thermal contact with an RF device for actively biasing the RF device operating in quasi-linear modes. The biasing device provides a low impedance current source with high current capability to the base of the RF device. The biasing device includes three specially-processed transistors. The second and third transistors are connected such that their base-emitter and base-collector junctions are in parallel effectively forming two exceptionally low turn on series diodes. The result of reducing the resistances of the second and third transistors, by configuration and processing, is that they turn on slightly before the RF device is biased to its quiescent point.

REFERENCES:
patent: 4242598 (1980-12-01), Johnson et al.
patent: 4320349 (1982-03-01), Freers et al.
patent: 4663599 (1987-05-01), Patch
patent: 4924194 (1990-05-01), Opas et al.
patent: 5160898 (1992-11-01), Black
Gunther, "Low Impedance, Temperature Compensated Bias Supply", Motorola Technical Disclosure Bulletin, vol. 3, (1983), p. 20.
Helge Granberg, "Biasing Solid State Amplifiers to Linear Operation", RF amplifiers, pp. 72-76, Apr. 1991.
Bruce Utter, Application Note for Z0-28 Communications Transistor Corporation: Application Note for Z0-028, Acrian Power Solutions (Jan. 1989).

Affiliated with

Also associated with

Rating

Device for biasing an RF device operating in quasi-linear modes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for biasing an RF device operating in quasi-linear modes , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for biasing an RF device operating in quasi-linear modes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-989494