Push-pull drive circuit for a power converter
US4829415A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3378
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply includes a source of first and second switching signals that are at opposite phases. First and second MOS power transistors have main current conducting electrodes coupled to a transformer and have gate electrodes that are respectively coupled to the first and second signals to provide push-pull operation. When a transition occurs in a first one of the MOS transistors from a conductive state to a nonconductive state, a voltage is developed at its gate electrode due to its input Miller capacitance. The gate electrode voltage is coupled to a control terminal of a controllable attenuator that attenuates the switching signal that is coupled to the gate of the other MOS transistor. This delays the initiation of the conductive state in the other MOS transistor until immediately after the first transistor becomes nonconductive, thereby avoiding simultaneous conduction in the two transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.