Circuit and method for rectifying and regulating voltages

Details Circuit and method for rectifying and regulating voltages Circuit and method for rectifying and regulating voltages

2007-11-30

2010-06-15

Patel, Rajnikant B (Department: 2838)

Electric power conversion systems

Current conversion

Having plural converters for single conversion

C363S127000, C323S267000

Reexamination Certificate

active

07738272

ABSTRACT:
A circuit having a first input and a second input configured to apply an alternating voltage, a first output and a second output configured to supply a rectified and regulated voltage, a rectifier bridge circuit having a current return circuit, a third transistor and a fourth transistor, and a controller configured to regulate the voltage between the first and the second output to a constant value. The current return circuit is connected to the first input, the second input and to the second output. The third transistor is configured as a series voltage regulator and is connected to the first input and the first output. The fourth transistor is configured as a series voltage regulator and is connected to the second input and the first output. The controller is coupled to a control input of the third transistor and to a control input of the fourth transistor. Further, a method for rectifying and regulating voltages of a circuit is provided. The circuit and the method can be used in a contactless chip card.

REFERENCES:
patent: 6134130 (2000-10-01), Connell et al.
patent: 6487100 (2002-11-01), Watanabe et al.
patent: 6831378 (2004-12-01), Watanabe et al.
patent: 2008/0259665 (2008-10-01), Brederlow et al.

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