Switching regulator with lower transistor capable of two...

Details Switching regulator with lower transistor capable of two... Switching regulator with lower transistor capable of two...

2007-08-17

2009-10-20

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

C323S282000

Reexamination Certificate

active

07605571

ABSTRACT:
The present invention discloses a switching regulator, which comprises: a first and a second transistors electrically connected with each other; a pulse width modulation control circuit for turning ON and OFF the first transistor and turning ON the second transistor; and a current source control circuit for controlling the second transistor so that the second transistor becomes a current source, wherein the second transistor has only two states: ON and low current, and wherein when the first transistor is ON, the second transistor is in the low current state; and when the first transistor is OFF, the second transistor is ON or in the low current state.

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Adel Sedra and Kenneth Smith, Microelectronic Circuits, Dec. 1991, Third Edition, Saunders College Publishing, p. 428.

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