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:
Apr. 06, 2010
Filed:
Jan. 21, 2009
Chih-wei Chen, Taipei, TW;
Chuan-jane Chao, Taipei, TW;
Shyh-chyi Wong, Taipei, TW;
RichWave Technology Corp., Taipei, TW;
Abstract
A high-efficiency single-to-differential amplifier has a first transistor acting as a first amplification stage. A second transistor, a third transistor, a first choke, a second choke, and a first capacitor form a second single-to-differential amplification stage. The first amplification stage receives and amplifies an input signal, outputs the amplified signal to the second single-to-differential amplification stage through a coupling module, and concurrently provides DC bias current to the second single-to-differential amplification stage through a tank. The second single-to-differential amplification stage reuses DC current of the first amplification stage, amplifies the output signal of the first amplification stage, and transfers it to a differential output.