Circuit, method, and apparatus for continuously variable analog to digital conversion
US7068205B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2004 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Jun 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/462
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit, method and microcontroller apparatus for performing an analog to digital conversion with continuously variable resolution is disclosed. The circuit includes a integrating modulator for converting an analog input signal, corresponding to an input voltage, to a digital signal at its output over an integrate time. The circuit also includes a counter with an enable input coupled to the integrating modulator output. The counter accumulates the number of cycles where the digital signal is positive during the sample period and provides a corresponding conversion result. Further, the circuit has a pulse width modulator; its output gates a clock to the counter enable input. The pulse width modulator is user programmable on-the-fly to set said integrate time and said sample period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.