CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 9948 > Article
Presentation + Paper
30 September 2016 Modeling of an optocoupler-based audio dynamic range control circuit
Felix Eichas, Udo Zölzer
Author Affiliations +
Proceedings Volume 9948, Novel Optical Systems Design and Optimization XIX; 99480W (2016) https://doi.org/10.1117/12.2235686
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States
Abstract
Virtual analog modeling is the process of creating a digital model of an analog system. In this work a virtual analog model of a dynamic range compression circuit for electrical guitars is constructed by analyzing and measuring the analog reference system. The particular property of the chosen compression system is the use of an analog optical isolator, also called optocoupler. It is a two-port circuit element used to electrically isolate different parts of the audio system while maintaining one-directional coupling via the optical channel. The used analog optical isolator was a Perkin Elmer VTL5C2, consisting of a light dependent resistor and a light emitting diode in an opaque enclosure. All the characteristics of the nonlinear elements were measured, especially the VTL5C2, then the circuit was analyzed to determine its static behavior. In the digital model the output signal is multiplied with a timevariant gain factor, which is dependent on the input signal. Several processing blocks are used to calculate the gain factor, emulating the static and dynamic behavior of the analog reference system. An iterative error minimization procedure is used to refine parameters for the digital model. Finally the output of digital model and analog reference are compared to show how well the model has been adapted to the reference device.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Felix Eichas and Udo Zölzer "Modeling of an optocoupler-based audio dynamic range control circuit", Proc. SPIE 9948, Novel Optical Systems Design and Optimization XIX, 99480W (30 September 2016); https://doi.org/10.1117/12.2235686
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 16 PAGES + PRESENTATION
DOWNLOAD PAPER SAVE TO MY LIBRARY
WATCH
PRESENTATION
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Analog electronics
Analog electronics
Light emitting diodes
Resistance
Instrument modeling
Optical isolators
Optical isolators
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top