Electrical audio signal processing systems and devices – Sound effects
Patent
1996-03-04
1998-06-02
Isen, Forester W.
Electrical audio signal processing systems and devices
Sound effects
330293, 330102, H03G 300
Patent
active
057613176
ABSTRACT:
This disclosure shows the solid state emulation of elements of a thermionic emission device amplifier which distinguish it from solid state amplifiers: the output impedance of transformer impedance with plate resistance, the transfer function coupling from the driver tube to the output tubes, the non-linearity of the output tubes, the compression created by the power supply droop, the inclusion of "fat" from the power supply, bias shifting of the input, and driving the input from a non-linear network. This disclosure also depicts advantageous features not found in tube amplifiers: a means for turning it down and maintaining the tone by maintaining the interrelationships within the amplifier and fat creation from the amplifier output and from external sources. This disclosure is based upon the novel use of controlled gain and controlled impedance means.
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