| Title: | A 1.5V Multirate Multibit Sigma Delta Modulator for GSM/WCDMA in a 90nm Digital CMOS Process |
| Author: | Altun, Oguz |
| Abstract: | 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. |
| Type: | Dissertation |
| URI: | http://hdl.handle.net/1853/7104 |
| Date: | 2005-04-18 |
| Publisher: | Georgia Institute of Technology |
| Subject: |
Low-power
Mixed-signal Low voltage Sigma delta modulators |
| Department: | Electrical and Computer Engineering |
| Advisor: | Committee Chair: Allen, Phillip E.; Committee Member: Ayazi, Farrokh; Committee Member: Laskar, Joy; Committee Member: Leach, Marshall W.; Committee Member: Morley, Tom |
| Degree: | Ph.D. |
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| altun_oguz_200508_phd.pdf | 1.018Mb |
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