Patent ID: 6104256
Filing Date: 2000-08-15
Classification: H03K

Abstract:
A device with an oscillator circuit comprising:a current source;a capacitive node;a switching circuit coupling the current source and the capacitive node, the switching circuit having a control input for switching the switching circuit at least into a first or a second state, wherein the capacitive node is charged from the current source or discharged, respectively;a loop circuit coupling the capacitive node to the control input of the switching circuit, the loop circuit causing operation of the oscillator circuit in at least a first and a second mode, the first mode being an oscillating mode having an oscillating period affected by charging of the capacitive node substantially during a critical time-interval only; anda mode breaker circuit for providing a conduction path which frustrates charging of the capacitive node in the second mode;characterized in that the mode breaker circuit blocks the conduction path during the entire critical time-interval when the oscillator circuit operates in the first mode.