St-Ericsson Sa

Stmicroelectronics S.r.l.

Carmelo Santagati

Giuseppe Palmisano

Antonino Scuderi

Francesco Carrara

Calogero Davide Presti

A device for comparing the peak value of a periodic voltage signal or a linear combination of periodic voltage signals with a reference voltage includes a reference transconductor element for converting the reference voltage into a reference current, respective transconductor elements for converting each of the periodic voltage signals into respective periodic current signals, a current-comparison node for comparing the respective periodic current signals with the reference current, generating a comparison current as a difference between the sum of the aforesaid periodic current signals and the reference current, a current rectifier supplied with the comparison current, a hold capacitor charged with the output current of the current rectifier, and a discharge-current generator in parallel to the hold capacitor. The voltage across the capacitor indicates of the outcome of the comparison between the peak value of the periodic voltage signal or the linear combination of periodic voltage signals and the reference voltage.

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Misterbianco, Italy

Carmelo Santagati