Patent ID: 7511587

Claim:
Oscillator, consisting of an oscillator circuit that contains a circuit consisting of two one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) as a frequency-determining element and an active electronic component, whereby each one-port surface wave resonator ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) contains an interdigital converter ( 23 ; 33 ; 123 ; 133 ; 423 ; 433 ) for acoustical surface waves, and whereby the one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) differ from one another by the temperature dependence of the synchronous frequency, wherein the one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) use different propagation directions, and wherein a) the temperature coefficients of the first order of the synchronous frequency of the two one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ), with reference to a predetermined temperature, have different signs or are equal to zero, and wherein the temperature coefficients of the second order of the synchronous frequency of the two one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ), with reference to a predetermined temperature, have the same signs, whereby aa) if the temperature coefficients of the first order of the synchronous frequency of the two oneport surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) have different signs, the circuit consisting of the two one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) is a two-pole, in which an inductance is switched in parallel at least to one of the one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ), and whereby ab) if the temperature coefficients of the first order of the synchronous frequency of the two one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) are equal to zero, the circuit consisting of the two one-port surface wave resonators ( 2 ; 3 ; 12 ; 13 ; 42 ; 43 ) is a four-pole, and wherein b) in the case of the converters ( 23 ; 33 ; 123 ; 133 ; 423 ; 433 ), the ratio of their apertures ( 24 ; 34 ; 124 ; 134 ; 424 ; 434 ) relative to one another and the ratio of their tooth numbers ( 23 ; 33 ; 123 ; 133 ; 423 ; 433 ) relative to one another are selected in such a manner that the temperature influence on the oscillator frequency is a minimum in the usage temperature range of the oscillator, or has a desired value deviating from the minimum.