Title :
A simulation study of electromechanical delta-sigma modulators
Author :
Wu, Jiangfeng ; Carley, L. Richard
Author_Institution :
Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA
Abstract :
This paper introduces electromechanical delta-sigma modulators which take mechanical forces as inputs and use micromechanical transducers in the loops. A simulator is developed in which various nonidealities could be modeled. A simulation study on the 2nd and the 3rd-order modulators with single and multi-bit quantization is presented. A novel method called complementary pulse density modulation (CPDM) is proposed to realize linear multi-bit feedback using micro actuators
Keywords :
delta-sigma modulation; feedback; micromechanical devices; quantisation (signal); complementary pulse density modulation; electromechanical delta-sigma modulator; linear multi-bit feedback; mechanical force sensor; microactuator; micromechanical transducer; multi-bit quantization; numerical simulation; single-bit quantization; Actuators; Delta modulation; Digital modulation; Feedback; Force sensors; Microactuators; Micromechanical devices; Pulse modulation; Sensor systems; Transducers;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921345
