Amplifiers – With semiconductor amplifying device – Including class d amplifier
Patent
1982-08-30
1984-07-31
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including class d amplifier
330269, 330273, H03F 3217, H03F 326
Patent
active
044633181
ABSTRACT:
A class D power amplifier employing two N-channel field-effect power transistors includes an arrangement which develops a biasing voltage for the upper N-channel transistor. The biasing voltage exceeds the magnitude of the power source voltage so that the upper N-channel transistor can exhibit low channel ON resistance whereby substantially the entire supply voltage is applied to a load device. A transistor switch becomes conductive across a resistance which couples biasing voltage to the upper N-channel transistor when the biasing voltage exceeds the supply voltage.
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Berard, Jr. C. A.
Mullins James B.
Rasmussen P. J.
RCA Corporation
Wan G.
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