System and method for a vco
AssigneeInfineon Technologies AG
InventorsVadim Issakov, Fabio Padovan, Dmytro Cherniak
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Abstract
In accordance with an embodiment, a method of operating a voltage controlled oscillator (VCO) that having a VCO core coupled to a filtered current source includes setting an oscillation frequency of the VCO core based on a tuning signal received at a tuning signal input; and setting a resonant frequency of the filtered current source based on the received tuning signal using a tuning circuit having an input directly connected to the tuning signal input
Claims22
A method of operating a voltage controlled oscillator (VCO) comprising a VCO core coupled to a filtered current source, the method comprising:
- setting an oscillation frequency of the VCO core based on a tuning signal received at a tuning signal input;
- and
- setting a resonant frequency of the filtered current source based on the received tuning signal using a tuning circuit having an input directly connected to the tuning signal input.
A voltage controlled oscillator (VCO) comprising:
- a VCO core;
- a filtered current source coupled to the VCO core;
- and
- a tuning circuit directly connected to a tuning signal input, the tuning circuit configured to
- set an oscillation frequency of the VCO core based on a tuning signal received at the tuning signal input, and
- set a resonant frequency of the filtered current source based on the tuning signal.
An integrated circuit comprising:
- a semiconductor substrate;
- a voltage controlled oscillator (VCO) disposed on the semiconductor substrate, the VCO comprising a cross-coupled transistor pair, a first tunable resonator coupled to the cross-coupled transistor pair, a current source coupled to the cross-coupled transistor pair, and a second tunable resonator coupled between the cross-coupled transistor pair and the current source;
- and
- a tuning circuit comprising a tuning input, a first tuning output coupled to a first tuning input of the first tunable resonator, and a second tuning output coupled a second tuning input of the second tunable resonator.
Dependencies are inferred from the claim text.