An ultra low power second-order switched-capacitor (SC) sigma-delta (ΣΔ) modulator is presented. Using of a class-C inverter instead of an operational transconductance amplifier (OTA) enables the SC SA modulator to achieve sub-μW power consumption. The proposed modulator has been implemented using a 0.35-μm CMOS process. The measured peak SNR of the modulator is 56 dB in a 3-kHz signal bandwidth with sampling frequency of 200 kHz. Its dynamic range is approximately 56 dB and the power consumption is only 0.8 μW with a 1-V power supply.
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|Publication status||Published - 2004 Sep 7|
|Event||2004 IEEE International Symposium on Cirquits and Systems - Proceedings - Vancouver, BC, Canada|
Duration: 2004 May 23 → 2004 May 26
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering