CD4007-Based Voice Changer

Voice Changer (Ring Modulator) based on CD4007

This project is my entry to the 7400 Contest. It's a Voice Changer/Distorter based on a CMOS IC originally intended for digital use, the CD4007 IC. CD4007 contains two Complementary MOS pairs with the third pair connected as an inverter.

Simulation: Single Balanced Modulator

Warming up for a personal project in my virtual lab. This Single Balanced Modulator based on MOS devices will be one part of the project. 

Here are some simulation screenshots before I make the actual circuit.

LTspice Transient Analysis
Circuit under test above plotted trace

LTspice FFT Analysis

Simulation: Headphone Passive Bass Enhance

LTspice simulation