From Befaco's website:

Rampage is Befaco’s approach to an old invention: the Serge/Buchla ramp generator.

We took the idea of a “patch programmable” function generator/processor, put two units in the same module and expanded them with new functions and ways to combine them: Slope detectors, analogue logic functions and evolved outputs.

FEATURES

• Built around two voltage controlled Integrators aka Lag Processors.
• Convert square signals into ramp waveforms
• Achieve “Portamento” or “Glide” effect when applied to pitch CV signals.
• Basic lowpass filtering

SPECS

• Current needs: +12V: 110mA, -12V: 90mA
• Width: 18 HP
• Depth: 26mm (including power connector)
• Aluminium, heat-treated front panel
• Designed, kits prepared and completed modules assembled in Barcelona

RAMPAGE APPLICATIONS

• Voltage controlled Attack Decay envelope.
• Attack Sustain Release Envelope .
• More complex ADSR Style Envelope.
• Dual VCO. With Square, PWM, Saw, Log, Exp and Triangle shapes. Hard and soft sync.
• Gated VCO
• VCO + Analog AND Gate (As ADTimbral VCA)
• Dual Low Pass Filter
• Dual Low pass Filter with VCO soft sync.
• Low Pass Filter + AD Envelope

• Dual “syncable” voltage controlled LFO with Square, PWM, Saw and Triangle shapes)
• Complex LFO . Function combination.
• CV controlled and “Ping-Pong” LFO.
• Dual Slope detector. Distinguishes when and incoming signal (CV or audio) is rising or falling, and generates gates in concordance.
• Comparator. Send a gate when B IN is bigger than A IN
• Polyrythmic gate generator. With both channels synced between each other, it generates several “complex rhythm” gates.
• Voltage controlled Slew limiter with independent attack and decay control and continuous variable shape between Log, linear and exponential

• Peak Voltage follower. Max Out follow the maximum Level of the two inputs.
• Minimum Voltage Follower. Min Out follow the minimum level of the two inputs
• Envelope follower with adjustable response for rising ans falling flanks.
• Voltage controlled Trigger Delay .
• Burst Generator.