Apparatus for providing a sinusoidally amplitude-modulated...

Details Apparatus for providing a sinusoidally amplitude-modulated... Apparatus for providing a sinusoidally amplitude-modulated...

H - Electricity

05

B

H05B 41/26 (2006.01) H05B 41/24 (2006.01)

Patent

CA 2550279

In the case of an apparatus for providing a sinusoidally amplitude-modulated operating voltage, two switches are arranged in the form of a half bridge, and an LC element is arranged downstream of the half bridge. The first switch is driven by a first square-wave signal in a clocking with the amplitude modulation frequency per clock cycle, and the second switch (QLOW) is driven by a second square-wave signal, which is shorter than the first signal, with a temporal offset with respect to the first signal in each clock cycle. The LC element (LMOD, CMOD) acts as a filter for the signal resulting from the driving of the switches at a connection point (K) between the switches and allows a DC voltage component and a sinusoidal component of the signal with the fundamental frequency of the clocking to pass through, but substantially filters out harmonics.

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