Rc-oscillator circuit

An RC oscillator circuit is described in which a charge current (IPOSC 1 ) is integrated in an integrator ( 1 ). In a comparator ( 7 ), an output voltage (VCAP) of the integrator is compared to a reference threshold (VTH). Depending on the comparison, a periodic signal is generated in a clock pulse generator ( 9 ). Furthermore, a reference generator ( 8 ) is provided, which generates the reference threshold (VTH) depending on the temperature and on the supply voltage of the entire circuit. In this way, the frequency dependence of the oscillator is largely compensated for as far as fluctuations in the supply voltage are concerned.