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US 2022/0337254 A1Published application
Apparatus for Digitally Controlled Oscillators and Associated Methods
AssigneeSilicon Laboratories Inc.
InventorJohn M. Khoury
Life of this patent
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Abstract
An apparatus includes a digitally controlled oscillator (DCO), which includes an inductor coupled in series with a first capacitor. The DCO further includes a second capacitor coupled in parallel with the series-coupled inductor and first capacitor, a first inverter coupled in parallel with the second capacitor, and a second inverter coupled back-to-back to the first inverter. The DCO further includes a digital-to-analog-converter (DAC) to vary a capacitance of the first capacitor.
Claims20
An apparatus, comprising:
- a digitally controlled oscillator (DCO) comprising:
- an inductor coupled in series with a first capacitor;
- a second capacitor coupled in parallel with the series-coupled inductor and first capacitor;
- a first inverter coupled in parallel with the second capacitor;
- a second inverter coupled back-to-back to the first inverter;
- and
- a digital-to-analog-converter (DAC) to vary a capacitance of the first capacitor.
4 more elements
An apparatus, comprising:
- a digitally controlled oscillator (DCO) comprising:
- a first capacitor having first and second terminals;
- a first inductor having first and second terminals, wherein the first terminal is dotted and is coupled to the first terminal of the first capacitor;
- a second inductor having first and second terminals, wherein the first terminal is dotted and is coupled to the second terminal of the first capacitor;
- and
- a set of capacitors coupled in a Π-configuration, wherein a first terminal of the Π-configuration is coupled to the second terminal of the first inductor, and the second terminal of the Π-configuration is coupled to the second terminal of the second inductor.
3 more elements
An apparatus, comprising:
- a digitally controlled oscillator (DCO) comprising:
- a first capacitor having first and second terminals;
- a first inductor having first and second terminals, wherein the first terminal is dotted and is coupled to the first terminal of the first capacitor;
- a second inductor having first and second terminals, wherein the first terminal is dotted, and wherein the second terminal is coupled to the second terminal of the first capacitor;
- and
- a set of capacitors coupled in a Π-configuration, wherein a first terminal of the Π-configuration is coupled to the second terminal of the first inductor, and the second terminal of the Π-configuration is coupled to the first terminal of the second inductor.
3 more elements
Dependencies are inferred from the claim text.