Driving circuit having differential and H-bridge circuits for low voltage power source
US5939931A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Nov 25, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6871
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A driving circuit has first and second output terminals for connection with a load, for supplying the load with a constant voltage changing in polarity at predetermined timing, through the output terminals. A bridge circuit has first and second output nodes connected, respectively, to the first and second output terminals. A selector circuit selectively drives a plurality of current changeover switching elements of the bridge circuit. First and second differential amplifier circuits have first input terminals supplied with a predetermined reference voltage and second input terminals connected, respectively, to the first and second output nodes, and a common output terminal. A switching circuit selectively connects the first and second differential amplifier circuits to a power source in response to selective driving of the current changeover switching elements by the selector circuit. A bypass circuit is connected to the common output terminal of the first and second differential amplifier circuits to have conductivity thereof controlled by an output from the common output terminal, for bypassing part of current from the constant current source such that output voltage from the bri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.