A double-sampling pseudo-two-path bandpass Delta Sigma modulator

A double-sampling pseudo-two-path bandpass Delta Sigma modulator is propose d. This modulator has an output rate equal to twice the clock rate, uses n/ 2 operational amplifiers (op-amps) for an nth-order noise transfer function , and has reduced clock feedthrough in the signal path band. The required c locks can be simpler to implement than the conventional pseudo-two-path tec hniques. The measured signal-to-noise ratio and dynamic range of the fourth -order double-sampling pseudo-two-path bandpass Delta Sigma modulator in a 30-kHz bandwidth at a center frequency of 2.5 MHz (at a clock frequency of 5 MHz) are 62 and 68 dB, respectively.