Doepfer A-171-2v is a multifunctional module for modular synthesizers in Eurorack format. It is suitable for generating and editing control voltages and can be used as LFO, envelope generator, slew limiter and more. The module resembles a function generator and is a licensed copy of Ken Stone's VCS module. The module is available here in the Vintage Edition.
Doepfer A-171-2V VC Slew Processor/Generator Vintage Edition