Title :
A new oscillator based on bandpass Σ-Δ modulation for MEMS resonators
Author :
Ricart, J. ; Pons, J. ; Dominguez, M.
Author_Institution :
Dept. of Electron. Eng., Univ. Politecnica de Catalunya, Barcelona
Abstract :
A new large-signal oscillator topology based on sigma-delta modulation (BPSDO) is presented. This topology includes a complete bandpass sigma-delta modulator in the feedback loop, thus differing from our previous work, the pulsed digital oscillator (PDO). The oscillation frequency is determined by the MEMS resonator. The digital frequency can be extracted from the associated bitstream at the output of oscillator. Extensive discrete-time simulations have been carried out showing the goodness of the proposed approach
Keywords :
micromechanical resonators; oscillators; sigma-delta modulation; BPSDO; MEMS resonator; PDO; bandpass Sigma-Delta modulation; bandpass sigma-delta modulator; digital frequency; discrete-time simulation; feedback loop; oscillator topology; pulsed digital oscillator; sigma-delta modulation; Band pass filters; Chirp modulation; Damping; Digital modulation; Feedback loop; Laplace equations; Micromechanical devices; Oscillators; Resonant frequency; Sampling methods;
Conference_Titel :
Electron Devices, 2005 Spanish Conference on
Conference_Location :
Tarragona
Print_ISBN :
0-7803-8810-0
DOI :
10.1109/SCED.2005.4659387
