Apparatus and method of fine capacitance tuning for high resolution digitally controlled oscillator
AssigneeSamsung Electronics Co., Ltd.
InventorsSunghwan Kim, Wing Fai Loke, Siddharth Seth
Life of this patent
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Abstract
An apparatus and a method are provided. The apparatus includes a first capacitor, including a first end and a second end; a second capacitor, including a first end connected to the second end of the first capacitor, and a second end; a variable capacitor, including a first end connected to the second end of the first capacitor, and a second end; a third capacitor, including a first end connected to the first end of the first capacitor, and a second end connected to the second end of the variable capacitor; and a fourth capacitor, including a first end connected to the second end of the third capacitor, and a second end connected to the second end of the second capacitor.
Claims20
An apparatus, comprising:
- a first capacitor, including a first end and a second end;
- a second capacitor, including a first end connected to the second end of the first capacitor, and a second end;
- a variable capacitor, including a first end connected to the second end of the first capacitor, and a second end;
- a third capacitor, including a first end connected to the first end of the first capacitor, and a second end connected to the second end of the variable capacitor;
- and
- a fourth capacitor, including a first end connected to the second end of the third capacitor, and a second end connected to the second end of the second capacitor;
- a first output connected to the first end of the first capacitor and a second output connected to the second end of the second capacitor, wherein a frequency tuning step is reduced by reducing a difference in capacitance value between the first capacitor and the second capacitor.
A method of fine capacitance tuning, comprising:
- connecting a first end of a first capacitor to a first end of a second capacitor;
- connecting a first end of a variable capacitor to the first end of the first capacitor;
- connecting a first end of a third capacitor to a second end of the first capacitor;
- connecting a second end of the third capacitor to a second end of the variable capacitor;
- connecting a first end of a fourth capacitor to the second end of the variable capacitor;
- connecting a second end of the fourth capacitor to a second end of the second capacitor;
- and
- reducing a frequency tuning step by reducing a difference in capacitance value between the first capacitor and the second capacitor.
Dependencies are inferred from the claim text.