In recent telecommunication field, there are number of applications have been used such as cellular telephony, radio and television, medical imaging, high definition video processing, and multichannel applications. Nowadays sigma-delta modulator is one of the most popular architectures used in high-performance analog-to-digital and digital-to-analog converters, especially in high resolution and medium-to-low speed applications. Sigma-delta modulators are the most suitable analog to digital converter topologies for digitizing with high resolution analog signals at low frequency. Band pass sigma-delta modulators have recently received great consideration in the academia as well as in the industry. Today, there is a strong trend in using the band-pass (BP) sigma-delta ADC. The BP sigma-delta modulators allow for ADC in high IF and RF signal bands. As a result there is a large effort to develop and design high performance low power BP sigma-delta ADC for wireless mobile terminals. This book proposed design and experimental results of a 2nd order, discrete-time (DT), band-pass (BP) sigma delta modulator focused for wireless LAN receivers. In this book, 2nd order discrete time BP SD.
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