Design of a 1.5V 2mW 96dB Peak SNDR $\sum\Delta$ Modulator for Audio Applications

1.5V 2mW 96dB Peak SNDR, 오디오용 $\sum\Delta$ Modulator 설계

This paper presents a low-voltage, low-power $\Sigma$Δ modulator for audio applications. It use a simple second-order fully-differential switched-capacitor structure with a sampling frequency of 12.5 MHz and oversampling ratio of 256. It operates from a single 1.5V Bower supply and dissipates 2 ㎽. Extensive simulations using 0.25 ${\mu}{\textrm}{m}$ CMOS Process parameters show that it achieves 96㏈ peak SNDR in a 22 KHz bandwidth.