FAN Jun, HEI Yong, CHEN Cheng-ying. The Design of Low-Power Delta-Sigma Modulator Utilizing Chopper-Stabilization Technique[J]. 2011, 28(11): 76-80.DOI:
A low-power Delta-Sigma modulator for system of signal detection is presented
which is implemented in TSMC 0.18m 1P6M CMOS mixed-mode signal process.The modulator adopts structure of Cascaded of Integrator FeedBack (CIFB) for low complexity and chopper-stabilization technique for improvement of dc-offset and 1/f noise characterization.The power dissipation of modulator is 2mW at supply of 1.8V
the dimension of whole layout is 1.25×1.3 mm.The post-simulation of modulator shows that 92dB SNDR and 99.3dB SFDR and 15bits ENOB have been achieved within bandwidth of 50 kHz.The modulator is suitable for signal detection system of sensor.