Patent ID: 9070510
Filing Date: 2015-06-30
Classification: H01G,H03L

Abstract:
1. A digitally controlled oscillator, comprising: a gain stage; an inductor; a variable capacitor; and a first variable leaf capacitor comprising: a second variable leaf capacitor comprising: wherein the variable voltage bias is configured to drive the bias terminal of the varactor of the first variable leaf capacitor to one of a first bias voltage and a second bias voltage to tune the digitally controlled oscillator; and wherein the digital-to-analog converter is configured to drive the bias terminal of the varactor of the second variable leaf capacitor to one of a plurality of bias voltage settings to further tune the digitally controlled oscillator, the plurality of bias voltage settings ranging from approximately the first bias voltage to approximately the second bias voltage and comprising at least one intermediate setting between the first bias voltage and the second bias voltage.