Patent ID: 9531396
Filing Date: 2016-12-27
CPC Classification: H03B,H03J,H03L

Claim Text:
1. A device, comprising: an oscillator configured to generate an oscillating signal, the oscillator comprising: a frequency detector configured to generate a control signal according to at least one signal indicating the frequency of the oscillating signal; and a selection circuit configured to activate at least one of the first tuning bank and the second tuning bank according to the control signal, wherein each of the first tuning bank and the second tuning bank comprises a switch capacitor circuit, the switch capacitor circuit is configured to have a first capacitance when the switch capacitor circuit is turned on, and the switch capacitor circuit is configured to have a second capacitance when the switch capacitor circuit is turned off, and the first frequency band and the second frequency band are determined according to about two times of a ratio between the first capacitance and the second capacitance.