The CGS582 is a based on the 1973 Classic Serge Negative Slew module. It is a forerunner to the popular Dual Universal Slope Generator.

It can be used as both a falling slew rate controller, or a downwards sloping ramp LFO by hooking the [PULSE] output into the [INPUT].

From a 1970s catalog: The NEGATIVE SLEW (NEG) is one of the unique multi-functional patch-programmable modules in the Serge system.

The module features two independent sections with wide range voltage controllable slew rates. The slew is active in the negative direction only and can be patched to perform a number of synthesizer functions.

With the [PULSE] output applied to the [INPUT], the module will regenerate for use as a voltage controlled sawtooth oscillator or pulse generator.

An audio signal applied to the [INPUT] will be envelope detected, and the complex envelope will be available at the [OUTPUT].

If a pulse is applied to the [INPUT], the unit will function as an envelope generator with a fast rise time and a voltage controlled fall time.

Please note that this is a SINGLE Negative Slew Generator and that 2 are needed to replace the original CGS82