Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1994-12-23
1996-03-12
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330269, 381120, H03F 316, H03F 3185
Patent
active
054989973
ABSTRACT:
A transformerless solid state audio amplifier which exhibits the superior linearity and saturation characteristics of a triode vacuum tube amplifier, and which has an output impedance which nominally matches the impedance of a speaker is disclosed in which the gate of a low impedance transistor having triode-like current-voltage I-V characteristics is electrically coupled to an audio input source, the drain is electrically coupled to a supply voltage, a choke is connected in series between the drain and the supply voltage, and a speaker is coupled to the drain lead in parallel with the choke. Alternatively, a high impedance current source can be used instead of the choke.
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Mullins James B.
O'Banion John P.
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