Switched Capacitor A/d Converter Based on Butterworth Filter Implementation - Wei-ling Yi - Bücher - VDM Verlag Dr. Mueller e.K. - 9783639001600 - 22. April 2008
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Switched Capacitor A/d Converter Based on Butterworth Filter Implementation

Wei-ling Yi

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Switched Capacitor A/d Converter Based on Butterworth Filter Implementation

In this work, we present a fourth-order cascade-of-integrators feed­back Sigma-Delta A/D converter. We use Oversampling and Noise-Shaping techniques to earn a higher resolution than that in the Nyquist-Rate A/D converters. A generic method is presented to make the system stabilized. In order to fix the zeros and poles in the unit circle, we use MATLAB to design the Butterworth high pass filter, and then the coefficients could be obtained. We present a complete design flow to decrease the time of the design. By applying this method, a fourth-order Sigma-Delta A/D converter is implemented by TSMC 0.35 µm 2P4M Mixed-Signal Polycide process provided by National Chip Implementation Center. The circuit specification is as follows: the supply voltage is 3.3 V, the sampling rate is 256, the signal bandwidth is 20k Hz, the working frequency is 10.24Meg Hz, an SNR, 75.7dB is attained, and the total power consumption is 20.3 mW.

Medien Bücher     Taschenbuch   (Buch mit Softcover und geklebtem Rücken)
Erscheinungsdatum 22. April 2008
ISBN13 9783639001600
Verlag VDM Verlag Dr. Mueller e.K.
Seitenanzahl 72
Maße 108 g
Sprache Englisch