Simplified Analysis of Total Integrated Noise in Passive Switched-Capacitor and N-Path Filters

The total integrated noise in passive switched-capacitor and N-path filters is traditionally calculated using frequency-domain methods. We derive a technique that allows the determination of the total noise in such networks by inspection. The key aspect of our derivation is to exploit the properties of sampled linear periodically-switched networks, and to work in the time domain. Simulation results that support our analysis are given.