Non-dissipative series voltage switching regulator having improved switching speed
US4792746A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1987 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | May 11, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/691
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A FET switching regulator has a FET switch which is periodically turned on to couple an unregulated DC input voltage to an output filter which develops a regulated output DC voltage. Regulation of the output DC voltage is determined by the on time or duty cycle of the FET switch. A periodic waveform is developed by a pulse-width modulator. The pulse-width modulator compares the input and output DC voltages to a reference voltage to pulse-width modulate the periodic waveform to determine the duty cycle. When the periodic waveform goes high, it triggers a first regenerative circuit which drives the gate of the FET switch into saturation within 20-30 nanoseconds. When the periodic waveform goes low, a second regenerative circuit is triggered to return the FET switch to an off state within 20-30 nanoseconds. Accordingly, the FET switch may be operated at frequencies approaching 500 kHz without excessive power losses within the FET switch in the transitory states between cutoff and saturation. The regenerative circuits may be blocking oscillators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.