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US 6,888,415 B2Granted
Ring oscillator devices and methods of generating signals
AssigneeIntel Corporation
InventorsCindra Widya Abidin, Georgios S. Asmanis
Life of this patent
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Abstract
Techniques to tune a frequency of a sinusoidal signal using devices having controllable signal phase delay times. One implementation may include an input terminal to receive an input signal; a first delay path to selectively receive the input signal; a second delay path to selectively receive the input signal; and a control terminal to control an extent to which the input signal flows through the first delay path and the second delay path.
Claims27
An apparatus comprising:
- a clock and data recovery device to provide a version of a first signal re-timed based on a clock signal, wherein the clock and data recovery device includes a clock source to provide the clock signal, wherein the clock source includes:
- an input terminal to receive an input signal;
- a first delay path to selectively receive the input signal;
- a second delay path to selectively receive the input signal, wherein the second delay path includes:
- a delay device to delay the input signal, wherein the delay device includes an amplifier to amplify the input signal;
- and
- a control terminal to control an extent to which the input signal flows through the first delay path and the second delay path.
4 more elements
An apparatus comprising:
- a clock and data recovery device to provide a version of a first signal re-timed based on a clock signal, wherein the clock and data recovery device includes a clock signal source, wherein the clock signal source includes:
- at least three inter-coupled ring elements to output the clock signal, wherein each ring element comprises:
- an input terminal to receive an input signal;
- a first delay path to selectively receive and delay the input signal;
- a second delay path to selectively receive the input signal, wherein the second delay path comprises:
- a delay device to delay the input signal, wherein the delay device comprises an amplifier to amplify the input signal;
- and
- a control terminal to control an extent to which the input signal flows through the first delay path and the second delay path.
5 more elements
A system comprising:
- a clock and data recovery system to provide a version of an input signal re-timed based on a clock signal, wherein the clock and data recovery system comprises at least two chain-coupled ring elements to output the clock signal and wherein each ring element comprises:
- an input terminal to receive a feedback signal,
- a first delay path to selectively receive the feedback signal,
- a second delay path to selectively receive the feedback signal, wherein the second delay path includes a delay device to receive the feedback signal, wherein the delay device comprises an amplifier to amplify the feedback signal, and
- a control terminal to control an extent to which the feedback signal flows through the first delay path and the second delay path;
- a data processor to receive the re-timed version of the input signal from the clock and data recovery system;
- and
- an interface to exchange signals with the data processor.
5 more elements
A method comprising:
- generating a re-timed version of a source signal using a clock signal, wherein the clock signal is generated by:
- directing an input signal among at least two paths based on a control signal, wherein the at least two paths include:
- a first path and a second path and wherein the second path delays the input signal more than the first path and wherein the second path amplifies the input signal, and
- providing an output signal based upon the delayed input signal;
- and
- directing the output signal among at least two paths based on the control signal, wherein the at least two paths include:
- a third path and a fourth path and wherein the fourth path delays the output signal more than the third path;
- providing a second output signal based upon the delayed output signal;
- and
- providing the clock signal based on the second output signal.
7 more elements
An apparatus comprising:
- an input terminal to receive an input signal;
- a first delay path to selectively receive the input signal;
- a second delay path to selectively receive the input signal, wherein the second delay path includes:
- a delay device to delay the input signal, wherein the delay device includes an amplifier to amplify the input signal;
- and
- a control terminal to control an extent to which the input signal flows through the first delay path and the second delay path.
3 more elements
Dependencies are inferred from the claim text.