AES E-Library

AES E-Library

Analysis of the Nonlinear Transfer Functions of a Guitar-Effect-Pedal with a Starving Circuit

Despite the recent trend of digital transformation, the popularity of Guitar-Effect-Pedal (GEP) designed has does not declined. This paper describes the complexity of the nonlinear characteristics of analog circuitry in a GEP, which originates from not only clipping diodes but also the operational amplifier. It is well known that variation in the supply voltage of a GEP influences its sound. Based on this fact, we designed a bias starving circuit to control various transfer functions. Particular attention is paid to the difference between the odd and even intermodulation distortion. Those transfer functions were analyzed, using each 9th-order polynomial approximation. The analysis indicates that the analog specific properties beyond the approximation exist under a dynamic range of approximately minus 50dB.

Authors:
Affiliations:
AES Convention: Paper Number:
Publication Date:
Subject:
Permalink: http://www.aes.org/e-lib/browse.cfm?elib=20752

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!


AES - Audio Engineering Society