Let's Go Shopping


Let's Go Shopping



The CGS578 module is an excellent inter-patch VCA, featuring very low noise and exponential response. It was designed as a small VCA function for use at various places within a system for internal VCA functions (as opposed to the VCA's for output mixing).

The CGS578 has an audio taper that is an exponential curve with a 12db per volt sensitivity throughout the range except below about 0.5 volts. Below this threshold, the output of the VCA will decrease rapidly to completely attenuate the signal. This response is perfect for our envelope voltage range, and is responsible for exceptionally quiet operation.

Control voltage rejection is very high, and the unit cannot be overdriven beyond a gain factor of two


PCB Dimensions: 1" x 6" with 3.2mm fixing points 0.15" from the edges
Power Consumption: +12V @ -12V @

Original article, art & design copyright by Ken Stone

Email:  elby-designs@bigpond.com
© Copyright 2000. All rights reserved.     Revised: December 16, 2020