Title :
Design of RF BAW-based ΣΔ Modulators
Author :
Belfort, Diomadson ; Catunda, Sebastian Y. C. ; Aboushady, Hassan
Author_Institution :
Autom. & Comput. Eng. Dept., Fed. Univ. of Rio Grande do Norte, Natal, France
Abstract :
Analysis of the Bulk Acoustic Wave (BAW) resonator modeled as a two-port device is presented for applications in Sigma Delta Modulator (ΣΔM) based Analog-to-Digital Converter (ADC). The design of BAW-based Continuous Time (CT) ΣΔM starting from a Discrete Time (DT) model, which is designed from scratch, is presented and explained in details. In order to convert a DT ΣΔM into CT BAW-based ΣΔM, Finite Impulse Response (FIR) filters are used in the feedback path increasing the degrees of freedom. We discuss and validate the calculation of the FIR filter coefficients by using a design example of BAW-based ΣΔMs.
Keywords :
FIR filters; acoustic resonator filters; bulk acoustic wave devices; continuous time filters; discrete time filters; radiofrequency filters; sigma-delta modulation; two-port networks; ΣΔM; ADC; DT model; FIR filter; RF BAW-based ΣΔ modulator; analog-to-digital converter; bulk acoustic wave resonator; degrees of freedom; discrete time model; finite impulse response filter; sigma delta modulator; two-port device; Band-pass filters; Bulk acoustic wave devices; Capacitors; Mathematical model; Modulation; Radio frequency; Signal to noise ratio;
Conference_Titel :
Circuits and Systems (LASCAS), 2014 IEEE 5th Latin American Symposium on
Conference_Location :
Santiago
Print_ISBN :
978-1-4799-2506-3
DOI :
10.1109/LASCAS.2014.6820294