Pulse width modulated signal amplifier
US4458208A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1982 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Apr 9, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/305
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A pulse width modulated signal amplifier includes a power source, an integrator supplied with an input signal to be pulse-width-modulated and a carrier signal from a carrier signal oscillator, a comparator connected to the output of the integrator for producing a pulse width modulated signal, an output amplifier supplied with a DC voltage from the power source, and a negative feedback circuit connected between the input of the integrator and the output of the output amplifier. The negative feedback circuit becomes effective after a predetermined time from the time when the power source becomes ON so as to avoid the oscillation of the closed loop including the integrator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.