PWM comparator and class D amplifier
US8836419B2 · kind B2 · utility
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1References
14Claims
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Assignee
Inventor
Key dates
| Filing date | Dec 7, 2011 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Mar 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/351
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure generally relates to a PWM comparator and a class D amplifier. The PWM comparator described above introduces current feedback mechanism, basing the waveform state of received high frequency triangle signal and the level state of output signal of the PWM comparator, the hysteresis is changing dynamically. In the same resolution, the noise resistance ability of the PWM comparator described above is much better than that of the conventional PWM comparators which has a fixed hysteresis, thus the PWM comparator can work stably even if the duty cycle of output signal is nearly 100%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.