Constant voltage circuit, constant voltage supply system and...

Details Constant voltage circuit, constant voltage supply system and... Constant voltage circuit, constant voltage supply system and...

2011-08-02

2011-08-02

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S539000

Reexamination Certificate

active

07990207

ABSTRACT:
An input voltage signal VIN to be inputted to a gate terminal of a PMOS transistor M1is converted to a voltage value which was level shifted at the source terminal by an inter-terminal voltage between the gate and source of the PMOS transistor M1. This conversion is carried out in accordance with a bias current I1flowing from the constant current source IS through the source terminal of the PMOS transistor M1. The voltage thus converted is outputted from a source follower circuit through a capacitative element C1. A low-pass filter is constituted of the impedance of the PMOS transistor M1and the capacitative element C1in a signal path extending from the input voltage signal VIN to the source follower circuit.

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Phillip E. Allen et al., “CMOS Analog Circuit Design”, Second Edition, New York Oxford, Oxford University Press 202, p. 425.

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