Radio frequency amplifiers

Details Radio frequency amplifiers Radio frequency amplifiers

1999-03-09

2000-04-18

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including temperature compensation means

330296, H03F 304

Patent

active

060520329

ABSTRACT:
A radio frequency amplifier having a power transistor (Q1) to the base of which is coupled a radio frequency signal to be amplified. An amplified radio frequency signal is provided at the collector of the power transistor (Q1). A control transistor (Qc) has its base coupled to the base of the power transistor (Q1) while a driver transistor (Q2) provides a control bias signal to the bases of the control and power transistors. A differential amplifier (Qd1, Qd2) has a first input coupled to an input bias signal and an output coupled to the base of the driver transistor (Q2). The collector of the control transistor (Qc) is coupled to a second input of the differential amplifier to provide a negative feedback signal to the differential amplifier and the driver transistor (Q2) and thereby to stabilise the operating point of the power transistor (Q1).

REFERENCES:
patent: 5099204 (1992-03-01), Wheatley, III
patent: 5101175 (1992-03-01), Vaisanen
patent: 5109538 (1992-04-01), Ikonen et al.
patent: 5118965 (1992-06-01), Vaisanen et al.
patent: 5152004 (1992-09-01), Vaisanen et al.
patent: 5204643 (1993-04-01), Varronen
patent: 5214372 (1993-05-01), Vaisanen et al.
patent: 5230091 (1993-07-01), Vaisanen
patent: 5241284 (1993-08-01), Nyqvist et al.
patent: 5241694 (1993-08-01), Vaisanen et al.
patent: 5276917 (1994-01-01), Vanhanen et al.
patent: 5291147 (1994-03-01), Muurinen
patent: 5392464 (1995-02-01), Pakonen
patent: 5404585 (1995-04-01), Vimpari et al.
patent: 5432473 (1995-07-01), Mattila et al.
patent: 5434537 (1995-07-01), Kukkonen
patent: 5450620 (1995-09-01), Vaisanen
patent: 5493255 (1996-02-01), Murtojarvi
patent: 5497125 (1996-03-01), Royds
patent: 5506544 (1996-04-01), Staudinger et al.
patent: 5530923 (1996-06-01), Heinonen et al.
patent: 5548616 (1996-08-01), Mucke et al.
patent: 5564074 (1996-10-01), Juntti
patent: 5675611 (1997-10-01), Lehtinen et al.
patent: 5697074 (1997-12-01), Makikallio et al.
patent: 5745016 (1998-04-01), Salminen
patent: 5752172 (1998-05-01), Matero
patent: 5801587 (1998-09-01), Bray
patent: 5819165 (1998-10-01), Hulkko et al.
patent: 5986509 (1998-09-01), Lohninger
Patent Abstracts of Japan JP 581 78612.
Finnish Office Action.

Affiliated with

Also associated with

Rating

Radio frequency amplifiers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Radio frequency amplifiers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio frequency amplifiers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2339280