High efficiency modulated power supply

Details High efficiency modulated power supply High efficiency modulated power supply

2008-07-01

2008-07-01

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S240000, C323S282000, C330S127000

Reexamination Certificate

active

11001919

ABSTRACT:
A modulated power supply comprises a power switching stage having at least one power switching device for generating a power signal in response to an input modulating signal. A current source is positioned in parallel with the power switching stage and continuously generates an output current. An output stage combines the power signal and the output current to form an output power supply signal. The current source supplies some, or all, of the required current at any given time. The switching device in the power switching stage either supplies the remaining required current or sinks any excess current. This has an advantage of reducing the average and peak currents flowing through the switching device, and hence the average power dissipation in the device. The output current can be set at an average (e.g. RMS) value of the current in the output power supply signal.

REFERENCES:
patent: 6760303 (2004-07-01), Brouwer
patent: 6954415 (2005-10-01), Masui et al.
patent: 7034617 (2006-04-01), Takahashi et al.

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