Low cost analog to digital converter and a method for converting an analog signal to a digital signal
US7872600B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2009 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Jan 25, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/436
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a low cost analog to digital converter (ADC) and a method for converting an analog signal to a digital signal. The method includes the steps of: outputting a pulse modulation signal according to a digital value; performing a low-pass filtering to the pulse modulation signal to obtain a pulse averaged voltage; mixing a first proportion of the pulse averaged voltage and a second proportion of a voltage under test to obtain a composite voltage; comparing the composite voltage with a threshold voltage and adjusting the first digital value such that the composite voltage approaches the threshold voltage; and performing a complement operation to the digital value to obtain an analog to digital value corresponding to the voltage under test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.