operating capacitive sensors in force feedback mode has many benefits , such as improved bandwidth , and lower sensitivity to process and temperature variation . to overcome , the non - linearity of the voltage - to - force relation in capacitive feedback , a two - level feedback signal is often used . therefore , a single - bit σ - δ modulator represents a practical way to implement capacitive sensors interface circuits . however , high - q parasitic modes that exist in high - q sensors cause a stability problem for the σ - δ loop , and hence , limit the applicability of σ - δ technique to such sensors . a solution is provided that allows stabilizing the σ - δ loop , in the presence of high - q parasitic modes . the solution is applicable to low or high order σ - δ based interfaces for capacitive sensors .