Step-up / step-down circuit

Details Step-up / step-down circuit Step-up / step-down circuit

2007-08-21

2007-08-21

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C363S059000, C363S060000

Reexamination Certificate

active

11153745

ABSTRACT:
A step-up/step-down circuit can be simplified as compared with conventional circuits by including a step-down unit for receiving a system clock pulse alternately providing a reference voltage (GND) and a system voltage VDDin a repeated manner to output a voltage V4lower than the reference voltage (GND) by using a potential difference between the reference voltage (GND) and the system voltage VDD, a level shift unit for receiving the system clock pulse and the voltage V4output from the step-down unit to output a pulse signal Vohaving a greater potential difference than the potential difference between the reference voltage (GND) and the system voltage VDD, and a step-up unit for receiving the pulse signal Vooutput from the level shift unit to output a voltage V7higher than the reference voltage (GND).

REFERENCES:
patent: 5940284 (1999-08-01), Troutman
patent: 6359947 (2002-03-01), Rao
patent: 2001-218118 (2001-08-01), None

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