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Title: A 1.5V Multirate Multibit Sigma Delta Modulator for GSM/WCDMA in a 90nm Digital CMOS Process
Keywords: Low-power;Mixed-signal;Low voltage;Sigma delta modulators
Issue Date: 18-Apr-2005
Publisher: Georgia Institute of Technology
Description: A dual-mode second-order Multirate Multibit Sigma Delta (MM-SD) modulator is implemented in a 90nm digital CMOS process for application in the baseband path of RF receivers. Low power consumption is achieved through a new integrator structure and a dedicated timing scheme along with aggressive capacitor scaling in the second stage of the modulator loop. Fabricated prototype achieves 68.6dB peak Signal-to-Noise and Distortion ratio (SNDR) in the 200 kHz GSM band and requires 1.1mA of total current from a 1.5V supply. This dual-mode design also achieves 42.8dB SNDR in the 1.94 MHz WCDMA band with only 1.9mA of total current consumption.;Ph.D.;Committee Chair: Allen, Phillip E.; Committee Member: Ayazi, Farrokh; Committee Member: Laskar, Joy; Committee Member: Leach, Marshall W.; Committee Member: Morley, Tom
Type Of Material: OTHER
Appears in Collections:College of Engineering (CoE)

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