TY - GEN
T1 - An 80-dB SNR 4th-order discrete-time sigma-delta modulator
AU - Kwon, Chan Keun
AU - Jeong, Chan Hui
AU - Min, Young Jae
AU - Jung, Young Mok
AU - Kim, Soo Won
PY - 2011
Y1 - 2011
N2 - This paper presents a 4th-order single-bit DT ΔΣ modulator for audio applications. To achieve higher signal-to-noise ratio (SNR), the compensation capacitors in the input of a comparator are exploited to reduce the metastability of a comparator. The proposed modulator has been fabricated in a quantizer level 0.18-μm CMOS process. Measurements show a SNR of 80.27 dB and a signal-to-noise and distortion ratio (SNDR) of 77.58 dB over a 40-kHz signal bandwidth with a sampling clock frequency of 10.24 MHz. A total power consumption including a clock generator is 340 μW with a 1.8-V supply voltage.
AB - This paper presents a 4th-order single-bit DT ΔΣ modulator for audio applications. To achieve higher signal-to-noise ratio (SNR), the compensation capacitors in the input of a comparator are exploited to reduce the metastability of a comparator. The proposed modulator has been fabricated in a quantizer level 0.18-μm CMOS process. Measurements show a SNR of 80.27 dB and a signal-to-noise and distortion ratio (SNDR) of 77.58 dB over a 40-kHz signal bandwidth with a sampling clock frequency of 10.24 MHz. A total power consumption including a clock generator is 340 μW with a 1.8-V supply voltage.
KW - Analog-to-digital converter
KW - Comparator-metastability
KW - Compensation capacitor
KW - Discrete-time ΔΣ modulator
UR - http://www.scopus.com/inward/record.url?scp=84863057618&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863057618&partnerID=8YFLogxK
U2 - 10.1109/ISICir.2011.6131938
DO - 10.1109/ISICir.2011.6131938
M3 - Conference contribution
AN - SCOPUS:84863057618
SN - 9781612848648
T3 - 2011 International Symposium on Integrated Circuits, ISIC 2011
SP - 230
EP - 233
BT - 2011 International Symposium on Integrated Circuits, ISIC 2011
T2 - 2011 International Symposium on Integrated Circuits, ISIC 2011
Y2 - 12 December 2011 through 14 December 2011
ER -