학술논문
An ultra low power sigma-delta modulator for hearing aid with double-sampling
Document Type
Conference
Author
Source
2009 IEEE 8th International Conference on ASIC ASIC, 2009. ASICON '09. IEEE 8th International Conference on. :1141-1144 Oct, 2009
Subject
Language
ISSN
2162-7541
2162-755X
2162-755X
Abstract
A single-loop third-order switched-capacitor Sigma-Delta modulator for hearing aid application is presented. Double-Sampling is introduced to achieve a high performance with comparative low power consumption. The effect of capacitor mismatch is further discussed. To over come the switch-on problem under low-voltage, bootstrapping is adopted in this design. The modulator is implemented under SMIC0.13 µ m mix signal technology, the post simulation results indicates the modulator achieves 92-dB SNDR in 8 kHz signal bandwidth with an OSR of 128. The power consumption is 38uW under 1-V supply voltage and the chip core size is 0.25 mm 2 .