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:
Jun. 24, 2014
Filed:
Jan. 08, 2013
Lsi Corporation, San Jose, CA (US);
Ross S. Wilson, Menlo Park, CA (US);
Said E. Abdelli, Minneapolis, MN (US);
Peter Kiss, Basking Ridge, NJ (US);
Donald R. Laturell, Oak Hill, FL (US);
Kameran Azadet, Pasadena, CA (US);
James F. MacDonald, Stillwater, MN (US);
LSI Corporation, San Jose, CA (US);
Abstract
The invention may be embodied in a resynchronizing, push-pull drive circuit for driving the gate electrodes of a digital Class-S Radio Frequency Power Amplifier (RF-PA). A binary bitstream received from a bitstream generator, such as a sigma-delta modulator, Viterbi-based optimal-bit-pattern modulator sigma-delta, or other suitable modulator, is resynchronized to a low-jitter master clock, then converted to fast-rise, high-swing complementary digital signals to drive the gates of the Class-S RF-PA. The drive circuit provides a high slew-rate, large-swing, quasi-digital gate drive circuit to drive the significant gate capacitance of the RF-PA with sufficient rise times. A combination of bipolar transistor current switches and cascoded CMOS devices is employed to attain requisite performance. For example, the driving circuit is well suited for use with Class-S RF-PAs used in wireless communication systems.