Continuous-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 telecommunication filters are given in order to assess its effectiveness.
On Chip Self-tuning of High Performance Filters via Pseudo-random Input Test Signal / Matarrese, Gianvito; Marzocca, Cristoforo; S., Damico; Corsi, Francesco; A., Baschirotto. - 1:(2005), pp. 342-348. (Intervento presentato al convegno 11th International Mixed-Signals Testing Workshop, Cannes, Francia tenutosi a Cannes nel 27-29 Giugno 2005).
On Chip Self-tuning of High Performance Filters via Pseudo-random Input Test Signal
MATARRESE, Gianvito;MARZOCCA, Cristoforo;CORSI, Francesco;
2005-01-01
Abstract
Continuous-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 telecommunication filters 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.
