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T. Rutt, "Over-Threshold Power Function Feedback Distortion Synthesis," Paper 7930, (2009 October.). doi: T. Rutt, "Over-Threshold Power Function Feedback Distortion Synthesis," Paper 7930, (2009 October.). doi:
Abstract: This paper describes an approach to nonlinear distortion synthesis, which uses Over-Threshold Power Function (OTPF) Feedback. The linear gain of an OTPF Feedback distortion synthesizer (using a high gain amplifier) is determined by a linear feedback element. When the output signal becomes greater than a positive threshold value, or less than a negative threshold value, additional OTPF feedback is applied to the distortion synthesizer. The action of this OTPF Feedback Distortion synthesis closely emulates the soft limiting input/output response characteristics of Vacuum tube triode grid limit distortion. An important feature of an OTPF feedback distortion synthesizer that it always behaves as an instantaneous soft limiter, and never results in clipping of the output signal peak levels (even at maximum allowable peak input signal levels), if its non-linear gain constants are set optimally. The paper also describes both circuit and software plug-in realizations of distortion synthesizers which employ Over-Threshold Cubic Function Feedback

@article{rutt2009over-threshold,
author={rutt, tom},
journal={journal of the audio engineering society},
title={over-threshold power function feedback distortion synthesis},
year={2009},
volume={},
number={},
pages={},
doi={},
month={october},} @article{rutt2009over-threshold,
author={rutt, tom},
journal={journal of the audio engineering society},
title={over-threshold power function feedback distortion synthesis},
year={2009},
volume={},
number={},
pages={},
doi={},
month={october},
abstract={this paper describes an approach to nonlinear distortion synthesis, which uses over-threshold power function (otpf) feedback. the linear gain of an otpf feedback distortion synthesizer (using a high gain amplifier) is determined by a linear feedback element. when the output signal becomes greater than a positive threshold value, or less than a negative threshold value, additional otpf feedback is applied to the distortion synthesizer. the action of this otpf feedback distortion synthesis closely emulates the soft limiting input/output response characteristics of vacuum tube triode grid limit distortion. an important feature of an otpf feedback distortion synthesizer that it always behaves as an instantaneous soft limiter, and never results in clipping of the output signal peak levels (even at maximum allowable peak input signal levels), if its non-linear gain constants are set optimally. the paper also describes both circuit and software plug-in realizations of distortion synthesizers which employ over-threshold cubic function feedback},}

TY - paper
TI - Over-Threshold Power Function Feedback Distortion Synthesis
SP - EP -
AU - Rutt, Tom
PY - 2009
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2009 TY - paper
TI - Over-Threshold Power Function Feedback Distortion Synthesis
SP - EP -
AU - Rutt, Tom
PY - 2009
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2009
AB - This paper describes an approach to nonlinear distortion synthesis, which uses Over-Threshold Power Function (OTPF) Feedback. The linear gain of an OTPF Feedback distortion synthesizer (using a high gain amplifier) is determined by a linear feedback element. When the output signal becomes greater than a positive threshold value, or less than a negative threshold value, additional OTPF feedback is applied to the distortion synthesizer. The action of this OTPF Feedback Distortion synthesis closely emulates the soft limiting input/output response characteristics of Vacuum tube triode grid limit distortion. An important feature of an OTPF feedback distortion synthesizer that it always behaves as an instantaneous soft limiter, and never results in clipping of the output signal peak levels (even at maximum allowable peak input signal levels), if its non-linear gain constants are set optimally. The paper also describes both circuit and software plug-in realizations of distortion synthesizers which employ Over-Threshold Cubic Function Feedback