Patent ID: 9444475
Filing Date: 2016-09-13
CPC Classification: H03B,H03K,H03L

Claim Text:
1. An oscillator device comprising: an oscillation circuit configured to generate and provide an oscillating signal; a first biasing circuit configured to derive a bias current signal in accordance with a control signal and to apply the bias current signal to the oscillation circuit; a reference generating circuit configured to generate a reference voltage signal, and comprising a second biasing circuit configured to derive a reference bias current signal in accordance with the control signal; a comparison circuit configured to receive directly at least a voltage signal observed at an output of the first biasing circuit, and wherein the comparison circuit is configured to determine an error signal by comparing the voltage signal observed at the output of the first biasing circuit with the reference voltage signal observed at an output of the second biasing circuit, the voltage signal being indicative of an amplitude level of the oscillating signal and the reference voltage signal being indicative of a desired oscillator amplitude; and a controller configured to determine the control signal from the error signal and provide the control signal to the first biasing circuit and the second biasing circuit, wherein the bias current signal can be adjusted to control the amplitude level of the oscillating signal.