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Design of a power-efficient widely-programmable Gm-LC band-pass sigma-delta modulator for SDR

Opened Access Design of a power-efficient widely-programmable Gm-LC band-pass sigma-delta modulator for SDR

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Autor: Morgado García de la Polavieja, Alonso
Río Fernández, Rocío del
Rosa Utrera, José Manuel de la
Departamento: Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo
Fecha: 2016
Tipo de documento: Ponencia
Resumen: This paper presents the design and implementation of a fourth-order band-pass continuous-time modulator intended for the digitization of radio-frequency signals in softwaredefined- radio applications. The modulator architecture consists of two Gm-LC resonators with a tunable notch frequency and a 4-bit flash analog-to-digital converter in the forward path and a non-return-to-zero digital-to-analog converter with a finiteimpulse- response filter in the feedback path. Both system-level and circuit-level reconfiguration techniques are included in order to allow the modulator to digitize signals placed at different carrier frequencies, from 450MHz to 950MHz. A proper synthesis methodology of the loop-filter coefficients at system level and the use of inverter-based switchable transconductors allow to optimize the performance in terms of robustness to circuit errors, stability and power consumption. The circuit, implemented in 65- nm CMOS, can digitise signals with up to ...
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Tamaño: 2.357Mb
Formato: PDF

URI: https://hdl.handle.net/11441/74220

DOI: 10.1109/ISCAS.2016.7527168

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Esta obra está bajo una Licencia Creative Commons Atribución-NoComercial-SinDerivadas 3.0 Estados Unidos de América

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