A 1.2 GHz Band-Pass Sigma Delta Analog to Digital Modulator with Active Inductor based Resonators
نویسندگان
چکیده
This paper presents a 1.2 GHz continuous time 6 order band-pass Sigma Delta Analog to Digital modulator in IBM 0.18 um CMOS technology. Traditional RLC circuits, with spiral inductors as resonators, were replaced with active inductor based resonators with negative impedance circuits to enhance the quality factor, reduce chip area and eliminate post processing needs. Simulink and Cadence simulation yield an enhanced SNDR of 75 dB and power consumption of 29 mW. The modulator occupies 0.9 mm of chip area.
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