Voltage control circuit and method for supplying an...

Details Voltage control circuit and method for supplying an... Voltage control circuit and method for supplying an...

2006-03-08

2008-09-02

Laxton, Gary L (Department: 2838)

Amplifiers

Modulator-demodulator-type amplifier

C330S127000, C330S297000, C455S127100

Reexamination Certificate

active

07420411

ABSTRACT:
A voltage control circuit is proposed, having an input for supplying a voltage control signal and having an output for production of a supply voltage. The voltage control circuit contains a control loop with a DC/DC converter arranged between a first node and a second node. The first node is designed to emit the difference between signals which are applied on the input side. The second feed node is designed to emit the sum of the applied signals. The first and the second feed nodes provide two point modulation with the DC/DC converter within the control loop of the voltage control circuit. In this case, a signal which is applied on the input side is split into a radio frequency component and a low frequency component. The processing of the low frequency component in the DC/DC converter reduces the requirements for the switching frequencies for the DC/DC converter, increases the efficiency of the voltage control circuit, and reduces the power losses.

REFERENCES:
patent: 7058373 (2006-06-01), Grigore
patent: 7135918 (2006-11-01), Outaleb et al.
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ON Semiconductor “Switchmode™ Power Supply Reference Manual and Design Guide”, SMPSRM/D, Rev. 3, Jul. 2002, 64 pgs.
“Switching Regulators”, Walt Kester and Brian Erisman, Section 3, Analog Devices Technical Library on Power Management, 1999, 71 pgs.

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