Title :
The design of RF bandpass ΣΔ modulator with bulk acoustic wave resonators
Author :
Javid, Farakh ; Aboushady, Hassan ; Beilleau, Nicolas ; Morche, Dominique
Author_Institution :
LIP6-SoC Lab., Univ. of Paris VI, Pierre & Marie Curie, Paris, France
Abstract :
This paper proposes a method to introduce BAW resonators in the loop of a continuous-time sigma-delta modulator. The method is based on the equivalence between the noise-transfer-function of a conventional bandpass discrete-time sigma-delta and the noise-transfer-function of a continuous-time BAW-based sigma-delta modulator with FIRDACs. The method is general and can be applied to BAW resonators with and without cancellation of the anti-resonance frequency. The noise-transfer-function and the signal-transfer-function of the BAW-based sigma-delta modulator are analyzed and compared with their discrete-time counterpart.
Keywords :
acoustic resonators; bulk acoustic wave devices; sigma-delta modulation; transfer functions; FIRDAC; RF bandpass SigmaDelta modulator; anti-resonance frequency; bandpass discrete-time sigma-delta; bulk acoustic wave resonators; continuous-time sigma-delta modulator; noise-transfer-function; noise-transfer-function of a continuous-time BAW; Acoustic waves; Band pass filters; Circuits; Delta-sigma modulation; Noise cancellation; Q factor; Radio frequency; Resonator filters; Signal to noise ratio; Surface acoustic waves;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5118468
