Robert Zell Farmer

US Patent:

20110248649, Oct 13, 2011

Filed:

Dec 22, 2010

Appl. No.:

12/975819

Inventors:

Jefferson L. Gokingco - Austin TX, US
Stephen C. Gerber - Austin TX, US
Wayne T. Holcombe - Mountain View CA, US
Miroslav Svajda - San Jose CA, US
Robert G. Farmer - Modesto CA, US

International Classification:

H05B 41/36
H03M 1/66

US Classification:

315307, 341150

Abstract:

Systems and methods for a digital-to-charge converter (“DQC”) are disclosed. A DQC may include a converting circuit configured to receive a first digital signal indicative of a voltage across a capacitor coupled to an output pin of the digital-to-charge converter and to determine a present charge of the capacitor based at least in part on the first digital signal. The DQC may also include an error determining circuit coupled to the converting circuit, wherein the error determining circuit is configured to receive a second digital signal indicative of a target charge via an input pin of the digital-to-charge converter and to determine a difference between the target charge and the present charge. The DQC may further include a correction circuit coupled to the error determining circuit and configured to control a programmable current source to produce an analog signal at the output pin in response to the determined difference.