High power switch-mode radio frequency amplifier method and appa

Details High power switch-mode radio frequency amplifier method and appa High power switch-mode radio frequency amplifier method and appa

1992-07-06

1993-02-16

Mullins, James B.

Amplifiers

Miscellaneous

Amplifier protection means

330251, H03F 3217

Patent

active

051875802

ABSTRACT:
Disclosed are both methods and a circuit to achieve powers of many kilowatts in radio frequency amplification using a switch mode amplifier in a new class of operation. In operation the invention utilizes internal switch characteristics. Methods create a substantial voltage step at the end of a response time period which allows greater output power without increasing the maximum switch voltage, reduces the maximum switch voltage for the same power, and which permits reduction of the stress on the switch element. Utilization of internal varactor capacitance avoids undesirable circulating currents and avoids the effects of lead inductance. The design allows use of less expensive components and high voltage switches not manufactured for radio frequency applications by preferring a substantial internal capacitance to establish maximum power. Other components of the network circuitry are also coordinated with the internal varactor capacitance. Adjustment of the conduction angle for optimum power and elimination of a need to bias the driver are also disclosed.

REFERENCES:
patent: 3919656 (1975-11-01), Sokal et al.
patent: 4449174 (1984-05-01), Ziesse
patent: 4607323 (1986-08-01), Sokal et al.
patent: 4685041 (1987-08-01), Bowman et al.
patent: 4743858 (1988-05-01), Everard
patent: 4891746 (1990-01-01), Bowman et al.
patent: 5023566 (1991-06-01), El-Hamamsy et al.
J. Mandojana, K. Herman, & R. Zulinski; A Discrete/Continuous Time-Domain Analysis of a Generalized Class E Amplifier; IEEE Transactions on Circuits and Systems, vol. 37, No. 8, Aug. 1990; New York, US; pp. 1057-1060.
Herbert L. Krauss and Charles W. Bostain, Solid State Radio Engineering, Copyrighted 1980, New York, 394-412 and 448-454.
H. O. Granberg, Applying Power MOSFETs in Class D/E RF Power Amplifier Design, Jun., 1985, Cardiff Publishing, Co., 7-926 to 7-301.
Helge Granberg, RF Power MOSFETs, Copyrighted 1983, Garden City, New York.
Nathan O. Sokal and Richard Redl, Power Transistor Output Port Model, Jun., 1987, RF Design, pp. 45-53.
Design Automation, Inc., HEPA-PLUS (User Manual), Copyrighted 1990 Design Automation, Inc., Lexington, MA, pp. 4-26.
IXYS Corporation, San Jose, CA, IXYS Product Selector Guide, Unknown, Unknown.

Affiliated with

Also associated with

Rating

High power switch-mode radio frequency amplifier method and appa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High power switch-mode radio frequency amplifier method and appa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High power switch-mode radio frequency amplifier method and appa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2151816