TY - GEN
T1 - A new WiMAX sigma-delta modulator with constant-Q active inductors
AU - Tang, A.
AU - Yuan, F.
AU - Law, E.
PY - 2008
Y1 - 2008
N2 - This paper presents a new over-sampling sigma delta modulator forWiMAX applications using an active inductor based loop filter and CCO. The loop filter is composed of floating active inductors and offers several key advantages over its MIM capacitor loop filter counterpart including an adjustable bandwidth, an adjustable quality factor, an extremely small silicon area requirement and full compatibility with digitally oriented CMOS processes. The proposed modulator is implemented in UMC's 0.13μm 1.3 CMOS process. The sigma delta modulator comparator and sampler are driven from a new constant-Q active inductor CCO that provides phase noise below 118 dBc/Hz at 4 GHz operation. The sigma delta modulator exhibits a signal to noise ratio (SNR) of 42dB and a dynamic range (DR) of 63dB at a sample rate of 2G/s with an oversampling ratio (OSR) of 40 making it ideal for base-band sampling in WiMAX transceivers.
AB - This paper presents a new over-sampling sigma delta modulator forWiMAX applications using an active inductor based loop filter and CCO. The loop filter is composed of floating active inductors and offers several key advantages over its MIM capacitor loop filter counterpart including an adjustable bandwidth, an adjustable quality factor, an extremely small silicon area requirement and full compatibility with digitally oriented CMOS processes. The proposed modulator is implemented in UMC's 0.13μm 1.3 CMOS process. The sigma delta modulator comparator and sampler are driven from a new constant-Q active inductor CCO that provides phase noise below 118 dBc/Hz at 4 GHz operation. The sigma delta modulator exhibits a signal to noise ratio (SNR) of 42dB and a dynamic range (DR) of 63dB at a sample rate of 2G/s with an oversampling ratio (OSR) of 40 making it ideal for base-band sampling in WiMAX transceivers.
UR - http://www.scopus.com/inward/record.url?scp=51749091065&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2008.4541665
DO - 10.1109/ISCAS.2008.4541665
M3 - Conference contribution
AN - SCOPUS:51749091065
SN - 9781424416844
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 1304
EP - 1307
BT - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
T2 - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
Y2 - 18 May 2008 through 21 May 2008
ER -