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US 2006/0139104 A1Published application
Crystal oscillator
AssigneeIntel Corporation
InventorsPaul Stevenson, Jon Tourville, Nathan Pihlstrom
Life of this patent
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Abstract
An oscillator circuit may be operated in a high power mode or a reduced power mode. The high power mode provides fast start-up of the oscillator circuit.
Claims26
An oscillator circuit comprising:
- a bias current generator with a selectable current;
- a loop filter with a variable time constant to influence an oscillation amplitude;
- and
- a control circuit coupled to influence operation of the bias current generator and the loop filter.
1 more element
An integrated circuit comprising:
- two electrical contacts to be coupled to a crystal;
- a gain device to amplify oscillations from the crystal;
- and
- a control mechanism to operate the gain device in a start-up mode upon a starting event, and to operate the gain device in an operating mode after an operating condition is met.
1 more element
A method comprising:
- starting a crystal oscillator circuit in a high power mode to provide a fast start;
- determining that the crystal oscillator circuit has started;
- and
- running the crystal oscillator in a low power mode to save power.
1 more element
An electronic system comprising:
- an antenna;
- a receiver coupled to the antenna;
- and
- a system on a chip coupled to the receiver, wherein the system on a chip includes a crystal oscillator circuit having a gain device to amplify oscillations from a crystal, and a control mechanism to operate the gain device in a start-up mode upon a starting event, and to operate the gain device in an operating mode after an operating condition is met.
1 more element
Dependencies are inferred from the claim text.