Voltage regulator having bias current control circuit
US5130635A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Aug 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45076
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This invention relates to a bias current control circuit which drives a power MOS transistor. Since the power MOS transistor has a large capacitance which is formed between a gate and a channel, it is needed to provide a circuit which is able to sufficiently supply a drive current to the gate. Such a circuit increases a consumption current because the circuit has to always flow the current to drive the gate. This invention provides a circuit which cut the consumption current in the circuit when the transistor is not driven, and increases a consumption current in the circuit in order to keep a gate current when the transistor is driven.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.