Low-distortion transformer-coupled circuit

Details Low-distortion transformer-coupled circuit Low-distortion transformer-coupled circuit

1985-04-12

1986-09-30

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330195, H03F 126

Patent

active

046149147

ABSTRACT:
A low-distortion transformer-coupled circuit. An amplifier is constructed to have a negative output impedance equal to the resistance of the primary winding of a coupling transformer to which the amplifier is connected thereby cancelling the distortion component produced by the transformer distortion current flowing through the primary winding resistance. The input to the amplifier is thus coupled to the secondary winding of the transformer. A low-frequency feedback circuit is provided between the amplifier output and a non-inverting input thereof. Means is provided for adjusting the negative output impedance of the amplifier to match circuit parameters. Alternatively, the coupling transformer employs two matched primary windings and one secondary winding, and the amplifier is constructed to provide a signal to each primary winding.

REFERENCES:
patent: 4453131 (1984-06-01), Paullus

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