Efficient switch drive circuit

Details Efficient switch drive circuit Efficient switch drive circuit

1985-10-18

1987-04-07

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

307270, 363 97, G05F 146

Patent

active

046564144

ABSTRACT:
A circuit which drives a control node of a switching device, such as a base node of an output transistor in a switching power supply, is disclosed. A pulsewidth modulator provides an activating peak current pulse to the control node, but the peak current pulse is later removed to reduce power dissipation. Inductively coupled power sources provide steady state drive current and a negative potential which is applied to the control node the instant the switching device inactivates.

REFERENCES:
patent: 3838329 (1974-09-01), Michelet et al.
patent: 3999086 (1976-12-01), Ekelund
patent: 4220987 (1980-09-01), Rao et al.
patent: 4302807 (1981-11-01), Mentler
patent: 4420804 (1983-12-01), Nishino
patent: 4430608 (1984-02-01), Nesler
R. Hammond et al., "High Power Vector Summation Switching Power Amplifier Development", PESC '81, IEEE, Boulder, Co., USA. (29 Jun.-3 Jul. 1981), pp. 267-272.

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