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US 7,146,140 B2Granted
Quadrature oscillator and methods thereof
AssigneeIntel Corporation
InventorsAshoke Ravi, Krishnamurthy Soumyanath
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Abstract
Briefly, exemplary embodiments of the invention may provide devices and methods to provide precise and/or low phase-noise quadrature oscillation signals. A quadrature oscillator in accordance with an exemplary embodiment of the invention may include, for example, a phase-shift generator to provide a phase-shift of substantially π/2 radians to an oscillation signal between a first oscillation tank, which provides substantially no phase-shift, and a second oscillation tank.
Claims9
An apparatus comprising:
- a first phase-shift generator to provide a phase-shift of substantially π/2 radians to an oscillation signal between a first oscillation tank, which provides substantially no phase-shift, and a second oscillation tank;
- a second phase-shift generator to provide a phase-shift of substantially π/2 radians to the oscillation signal from the second oscillation tank;
- and
- a phase-inverter to invert the phase of the oscillation signal,
- wherein the phase-inverter comprises an amplifier to provide a gain such that a total gain across a loop, which comprises the amplifier, the first and second oscillation tanks, and the first and second phase-shift generators, is equal to substantially one.
2 more elements
An oscillator comprising:
- a first oscillation tank which produces substantially no phase-shift;
- a second oscillation tank which produces substantially no phase-shift;
- a first phase-shift generator to shift by substantially π/2 radians a phase of a signal from said first oscillation tank;
- a second phase-shift generator to shift by substantially π/2 radians a phase of a signal from said second oscillation tank;
- and
- a phase-inverter to invert a phase of a signal from said additional phase-shift generator,
- wherein the phase-inverter comprises an amplifier to provide a gain such that a total gain across a loop, which comprises the amplifier, the first and second oscillation tanks, and the first and second phase-shift generators, is equal to substantially one.
4 more elements
A wireless communication device comprising:
- a dipole antenna to send and receive wireless signals;
- and
- a quadrature oscillator comprising a phase-shift generator to provide a phase-shift of substantially π/2 radians to an oscillation signal between a first oscillation tank,
- which provides substantially no phase-shift, and a second oscillation tank;
- a second phase-shift generator to shift by substantially π/2 radians a phase of a signal from said second oscillation tank;
- and
- a phase-inverter to invert a phase of a signal from said additional phase-shift generator,
- wherein the phase-inverter comprises an amplifier to provide a gain such that a total gain across a loop, which comprises the amplifier, the first and second oscillation tanks, and the first and second phase-shift generators, is equal to substantially one.
5 more elements
A method comprising:
- generating a first phase-shift of substantially π/2 radians to an oscillation signal between a first oscillation tank, which provides substantially no phase-shift, and a second oscillation tank;
- generating a second phase-shift of substantially π/2 radians to the oscillation signal from the second oscillation tank;
- and
- inverting the phase of the oscillation signal,
- wherein inverting the phase comprises providing a gain such that a total gain across a loop, which comprises the first and second oscillation tanks, generating the first phase-shift, and generating the second phase-shift, is equal to substantially one.
2 more elements
Dependencies are inferred from the claim text.