Pulse width modulation amplifier circuit
US4949048A · kind A · utility
41Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/2171
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A pulse width modulation amplifier circuit includes a comparator which receives an analog signal and generates first and second analog signals having a phase difference of 180 degrees. A phase shifting circuit produces first and second triangular wave carrier signals so as to establish therebetween a phase difference of approximately 90 degrees. First and second pulse width modulation amplifiers, having output terminals connected to a load, pulse width modulate the first and second triangular wave carrier signals with said first and second analog signals, respectively, and amplify resultant pulse width signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.