Continuos-Time filters are widely used in signal processing but require a tuning system to align their frequency response. Several tuning techniques have been proposed in the literature, which can be grouped in two basic schemes: master-slave and self-calibration arrangements. Here we propose a novel tuning approach which can be applied to both tuning schemes. The tuning algorithm is based on the application of a pseudo-random input Test Pattern Signal and on the evaluation of a few samples of the input-output cross-correlation function. The key advantages of the proposed technique are basically the use of a pseudo-random pattern signal which can be generated by a very simple circuit in a small die area and the simple circuitry required to sample the filter output and to perform the cross-correlation operation. Some experimental results of the application of the proposed tuning technique to a benchmark filter are given in order to assess its effectiveness.
Pseudo-random Sequence Based Tuning System for Continuous-time Filters / Corsi, F.; Marzocca, C.; Matarrese, G.; Baschirotto, A.; D'Amico, S.. - STAMPA. - (2004), pp. 94-99. (Intervento presentato al convegno IEEE Design, Automation and Test in Europe Conference and Exhibition, 2004 tenutosi a Paris, France nel February 16-20, 2004) [10.1109/DATE.2004.1268833].
Pseudo-random Sequence Based Tuning System for Continuous-time Filters
F. Corsi;C. Marzocca;G. Matarrese;
2004-01-01
Abstract
Continuos-Time filters are widely used in signal processing but require a tuning system to align their frequency response. Several tuning techniques have been proposed in the literature, which can be grouped in two basic schemes: master-slave and self-calibration arrangements. Here we propose a novel tuning approach which can be applied to both tuning schemes. The tuning algorithm is based on the application of a pseudo-random input Test Pattern Signal and on the evaluation of a few samples of the input-output cross-correlation function. The key advantages of the proposed technique are basically the use of a pseudo-random pattern signal which can be generated by a very simple circuit in a small die area and the simple circuitry required to sample the filter output and to perform the cross-correlation operation. Some experimental results of the application of the proposed tuning technique to a benchmark filter are given in order to assess its effectiveness.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
