Surface acoustic wave driving circuit and oscillator therefor
First Claim
1. A surface wave resonator driving circuit, said resonator comprising a static capacitor and said driving circuit being adapted to supply a voltage to said resonator, wherein it comprises reactive means adapted to resonate in combination with said static capacitor of the resonator at a predetermined frequency of the initial driving period of the resonator at said voltage, said driving circuit comprising passive means adapted to determine oscillations at said predetermined frequency, and wherein said reactive means has a value so as to be essentially negligible with respect to the total reactance of the surface wave resonator after a predetermined initial period of time from the application of said voltage to said surface wave resonator.
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Accused Products
Abstract
A driving circuit of a surface wave resonator (X1) 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 (L3) 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 (R3) adapted to determine oscillations at said predetermined frequency (Fo).
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Citations
9 Claims
- 1. A surface wave resonator driving circuit, said resonator comprising a static capacitor and said driving circuit being adapted to supply a voltage to said resonator, wherein it comprises reactive means adapted to resonate in combination with said static capacitor of the resonator at a predetermined frequency of the initial driving period of the resonator at said voltage, said driving circuit comprising passive means adapted to determine oscillations at said predetermined frequency, and wherein said reactive means has a value so as to be essentially negligible with respect to the total reactance of the surface wave resonator after a predetermined initial period of time from the application of said voltage to said surface wave resonator.
Specification