Voltage controlled oscillator

the uniCYCLE oscillator offers inputs for hard- and soft-sync as well as inputs for exponential and linear frequency modulation. It has six waveform outputs: square, sawtooth, triangle, sine, even (opposite of square) and a sawtooth with doubled frequency. PWM is available for square, even and the double-saw.

http://www.vermona.com/en/products/modules/product/unicycle/