Graduate Thesis Or Dissertation
 

Design of a 1.8-V 14-bit [delta] - [sigma] A/D converter with 8X oversampling and 4 MHz Nyquist output rate

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  • In this dissertation, a new Δ∑ A/D converter is presented that is ideally suited for communication applications. It is based on a single-loop single-stage structure, which can realize a high maximum out-of-band quantization noise gain while maintaining stable operation and thus achieve 14-bit resolution at 8 times oversampling. A fifth-order Δ∑ analog-to-digital converter (A/D) has been designed and tested in a 0.18 μm CMOS process. This is the first single-stage Δ∑ A/D converter reported in the literature that achieves 14-bit resolution at 4 MHz equivalent Nyquist rate with a 1.8-V power supply.
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