A new switched capacitor resonator and its research

In bandpass sigma delta modulator, resonator is the key block, This papcr proposed a new resonator which can simplify the circuit implementation when designing bandpass modulator with Iowpass prototype. The effect of finite gain, finite bandwidth, and path mismatch on the resonator is analyzed. The function of the proposed resonator and the devired equations about path mismatch have been verified by switched capacitor software SWITCAR.