Noise Analysis of Auto-Reset Switched Capacitor Circuits

Thermal noise is one of the most important limiting factors on the performance of Switched-Capacitor (SC) circuits. Auto-Reset Switched Capacitor (AR-SC) structure imposes an extra serial switch to the integrating capacitor which seems increase the thermal noise power in comparison with traditional SC circuits. Reported improvements of AR-SC would be considered in company with noise analysis. Noise analysis of the AR-SC-Integrator and a second order AR-SC-BPF (Band Pass Filter) are presented and compared to the corresponding conventional SC circuits. Analytical results are validated by MATLAB and HSPICE.

Keywords:

Thermal noise , Switched capacitor circuit , Time domain noise analysis