Power supply circuit
US4494178A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1982 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Nov 17, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching regulator includes a first full-wave rectifier for rectifying an input a.c. voltage, at least one power switch connected between the first rectifier and the primary winding of a pulse transformer whose secondary winding is connected through a second full-wave rectifier and a filter to a pair of output terminals across which a regulated d.c. output voltage appears, and a control circuit comprised of a level-shift circuit, a comparator and a pulse width modulator for controlling the on/off condition of the power switch, whereby the pulse width modulator supplies a pulse modulated signal to turn the power switch on only when the comparator supplies a high level signal to the pulse width modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.