Analog conversion of pulse width modulated signals
US8593320B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | May 10, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/822
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of converting a periodic pulse width modulated input signal into a voltage output signal wherein the input signal is in an active state for a first portion of each of successive time periods and in an inactive state for a second portion of each time period. A first and second input is supplied to an integrator circuit and a first capacitor is coupled between a first output of the integrator circuit and the first input and a second capacitor is coupled between a second output and the second input of the integrator circuit during a first time period of the pulse width modulated signal. A third capacitor is coupled between a first output of the integrator circuit and the first input and a fourth capacitor is coupled between a second output of the integrator circuit and the second input during a successive second time period of the pulse width modulated signal. Said coupled capacitors are charged during the active state of the first and second time periods and discharged during the inactive state of the first and second time periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.