The invention refers to the electrical engineering/electronics field and
relates to an oscillator circuit consisting of a combination of two
frequency-determining elements and one active electronic circuit, wherein
the frequency-determining elements are designed as single-port surface
wave resonators with interdigital converters. According to the invention,
the two single-port surface wave resonators are connected to each other,
avoiding inductive components whereas, in the case of a combination in a
parallel circuit, the connection is designed as a combination oscillating
at high-frequency anti-resonance, and in the case of a combination in a
series circuit, the combination is designed as a combination oscillating
at high-frequency resonance. In addition, according to the invention, the
ratio of the apertures of the interdigital converters to one another, the
ratio of their number of prongs to one another, and the thickness of the
electrode layer of the single-port surface wave resonators as well as the
propagation direction for acoustic surface waves of the single-port
surface wave resonators are selected so that the temperature-dependent
change of the phase of the combination and the temperature-dependent
change of the total phase of the rest of the elements of the oscillator
circuit have signs opposite to one another and that the sum of these
phase changes in the thermal operating range of the oscillator circuit is
smaller than the value of the phase change of the combination and smaller
than the value of the phase change of the rest of the elements of the
oscillator circuit. The invention can be used with oscillators and
sensors based on acoustic surface waves, in particular with components
for which the temperature response of the oscillator frequency can be
set.