This paper presents a novel SAR-VCO hybrid 1-1 MASH ADC, where a passive 1 st -order noise-shaping SAR ADC eliminates Op-amp in the first stage. A VCO-based ADC digitizes the residue of SAR ADC with ...

A new circuit technique for voltage gain enhancement in CMOS op amp design suitable for low voltage and high speed operation is presented in this paper. A negative conductance is used to cancel the ...