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:
Nov. 05, 2013
Filed:
Mar. 02, 2012
Martin Kinyua, Cedar Park, TX (US);
Ruopeng Wang, Santa Clara, CA (US);
Martin Kinyua, Cedar Park, TX (US);
Ruopeng Wang, Santa Clara, CA (US);
Taiwan Semiconductor Manufacturing Co., Ltd., Hsin-Chu, TW;
Abstract
An amplifier includes first and second stages. The first stage includes an input node for receiving an analog input signal, an analog digital converter for converting the analog input signal to a digital input signal, and a first switching circuit for outputting a first analog intermediate output signal in response to receiving a digital pulse width modulated signal that is based on the digital input signal. The second stage is configured to receive a pulse width modulation quantization error of the first stage, scale the pulse width modulation quantization error of the first stage by a gain factor to produce a scaled pulse width modulation quantization error of the first stage, and output a second analog intermediate output signal based on the scaled pulse width modulation quantization error of the first stage. A summation circuit combines the first and second analog intermediate output signals to generate an amplified output signal.