Self-operating PWM amplifier
US6707337B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Sep 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/2173
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Differential integrator circuit integrates a differential between a difference between a signal supplied from a first signal source and a feedback signal of amplifier output and a difference between a signal supplied from a second signal source and a feedback signal of the amplifier output. The signal supplied from the second signal source is opposite in phase from the signal supplied from the first signal source. Thus, the integrator circuit outputs two integrated signals of different polarities. Comparator compares the two integrated signals from the integrator circuit to thereby output a PWM signal. First driver circuit amplifies the PWM signal and outputs the amplified PWM signal with inverted phase, and a second driver circuit amplifies the PWM signal and outputs the amplified PWM signal with noninverted phase. First switching circuit is driven by the output of the first driver circuit, while a second switching circuit is driven by the output of the second driver circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.