The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 1993
Filed:
Jul. 06, 1992
Robert M Porter, Jr, Fort Collins, CO (US);
Michael L Mueller, Loveland, CO (US);
Advanced Energy Industries, Inc., Fort Collins, CO (US);
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.