Method and apparatus for driving an oscillator

It is proposed a method and an apparatus for driving an oscillator (1), wherein a first control signal (b) in response to an output signal (e) of the oscillator (1) and a first reference signal (a) and a second control signal (d) in response to the first control signal (b) and a second reference signal (c) is generated and the oscillator (1) to the first control signal (b) and the second control signal (d) is applied and the output signal (e) having a frequency depending on the first control signal (b) and the second control signal (d) generated. By such a method or such a device is a low noise phase locked loop can be implemented with a large possible frequency range.