Circuit for five level waveform synthesis

Details Circuit for five level waveform synthesis Circuit for five level waveform synthesis

1988-06-13

1990-01-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including class d amplifier

363132, H03F 3217

Patent

active

048946214

ABSTRACT:
A switching power amplifier including a full bridge rectifier 10 having switches 20, 22, 24, 26, 30 and 32 connected on either side of the full bridge rectifier 10, provided to produce a five level waveform synthesis. Auxiliary switches 30 and 32 allow each half of the full bridge 10 to switch between three distinct voltage levels. Therefore, the third and fifth harmonics are eliminated, and further, the remaining harmonics are greatly suppressed. MOSFETs, bipolar transistors, vacuum tubes, etc., can be employed for the switches 20, 22, 24, 26, 30 and 32 depending upon the application of the circuit.

REFERENCES:
patent: 3227889 (1966-01-01), Paynter
patent: 4208711 (1980-06-01), Baker
patent: 4443841 (1984-04-01), Mikami et al.
patent: 4670828 (1987-06-01), Shekhawat et al.
Pelly et al. "The Hexfet's Integrar reverse rectifier", Australian Electronics Engineering, Apr. 1981, pp. 58-72.
"A High Power, High Frequency FET Inverter for a Low Frequency Transmitter", found in the MOSPOWER Applications Handbook, Dr. F. Lee, Dr. Dan Chen and Z. O. Fang, Siliconix Inc., Santa Clara, California, Specifically pp. 6-139 through 6-145.

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