Extendable N-channel digital pulse-width/pulse-frequency modulator
US8125287B2 · kind B2 · utility
1Cited by
10References
18Claims
0Family size
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Key dates
| Filing date | Feb 18, 2010 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Jul 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multichannel digital pulse width modulator/digital pulse frequency modulator uses a single ring oscillator that is shared by multiple channels. The ring oscillator has taps that can be used for least significant bit (LSB) precision of the generated PWM signal. The ring oscillator also produces a ring clock that is used to synchronize logic in the channels. Since the logic in the channels are synchronized by the ring clock, the channels can each independently produce different frequency PWM (or PFM) signals and still share the same ring oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.