Method and apparatus for converting PWM signal to analog output voltage
US7382301B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 2004 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Oct 29, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/822
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for converting a duty cycle of a pulse width modulated signal to an analog value comprising a clock signal generator for generating a clock signal, a window generation circuit for generating a window signal synchronized with the pulse width modulated signal having a window having a window start and a window termination, a counter drive circuit receiving the clock signal, the pulse width modulated signal and the window signal and producing a counter input signal, a counter circuit for counting pulses of the counter input signal and providing a counter output, a reset circuit for resetting the counter at the termination of the window; and a digital to analog converter for converting the counter output at the termination of the window to the analog value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.