Voltage regulator and AC-DC converter

Details Voltage regulator and AC-DC converter Voltage regulator and AC-DC converter

2011-04-19

2011-04-19

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S314000, C323S317000

Reexamination Certificate

active

07928709

ABSTRACT:
A voltage regulator is provided. An input node receives an input voltage. An output node provides a supply voltage. A first transistor is coupled between the input node and a node. A first resistor is coupled between the input node and a gate of the first transistor. A second transistor is coupled between the node and the output node. An amplifier includes a non-inverting input terminal for receiving a reference voltage and an inverting input terminal. A second resistor is coupled between the inverting input terminal and a ground. A third transistor is coupled between the second resistor and a gate of the second transistor, wherein the third transistor is controlled by an output of the amplifier. A fourth transistor is coupled between the third transistor and the first node, wherein a gate of the fourth transistor is coupled to the gate of the second transistor.

REFERENCES:
patent: 5714872 (1998-02-01), Heimerl et al.
patent: 5929616 (1999-07-01), Perraud et al.
patent: 6060871 (2000-05-01), Barker
patent: 7548044 (2009-06-01), Itoh et al.

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