Abstract: A circuit for generating a signal with adjustable frequency contains a reference oscillator for generating a reference signal, a comparison signal device having an addition value input and a clock input for generating a digital comparison signal, whose frequency depends on an addition value signal present at the addition value input and on a clock signal present at the clock input. A phase comparator generates a tuning signal that depends on the result of a comparison of the phase of the reference signal with the phase of the comparison signal. An oscillator, which is driven by the tuning signal, generates the output signal and an oscillator signal, from which the clock signal present at the clock input of the comparison signal device can be derived. A high-quality signal is generated by the circuit according to the invention. The circuit nonetheless has a low current consumption and outlay on components and can be readily integrated.