Ste S.a.s. Di G. Moiraghi & C.

Bridgestone Europe Nv/sa

Ste S.r.l.

Guido Moiraghi

Paolo Maria Moiraghi

Luca Moiraghi

Dave Pitcairn

Paolo Moiraghi

David Gutman

Salvatore Cappitella

Aniello Cambio

There is described a receiver of at least one radiofrequency modulated signal deriving from an antenna external to the receiver; the receiver comprises a first stage for the low noise amplification of the radiofrequency modulated signal and a demodulation stage of the above-mentioned signal. The receiver comprises a SAW filter adapted to act as a pass band filter about a predetermined frequency for the signal deriving from the first stage, a logarithmic amplifier adapted to amplify the signal deriving from the SAW filter, a peak detector of the output signal of the logarithmic amplifier, means adapted to control the gain of the first stage for the amplification of the radiofrequency modulated signal as a function of the output signal (Vopeak) of the peak detector.

Receiver of radio frequency signals

A driving circuit of a surface wave resonator (X) is described; the resonator comprises a static capacitor (Co) and the driving circuit is adapted to supply a voltage (Vx) to the resonator. The driving circuit comprises reactive means (L) adapted to resonate in combination with said static capacitor (Co) of the resonator at a predetermined frequency (Fo) in the initial driving period of the resonator at said voltage; the driving circuit comprises passive means (R) adapted to determine oscillations at said predetermined frequency (Fo).

Surface acoustic wave driving circuit and oscillator therefor

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Milan, Italy

Guido Moiraghi