Clock generation circuit
First Claim
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1. A circuit, comprising:
- a first frequency to voltage converter for storing a reference voltage based on a frequency of an incoming signal;
a second frequency to voltage converter for storing a second voltage based on the frequency of the incoming signal, the second voltage being a fraction of the reference voltage;
a voltage to frequency converter coupled to the first and second frequency to voltage converters, the voltage to frequency converter creating a voltage on a node, the voltage repeatedly varying between about the reference voltage and about the second voltage.
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Abstract
A circuit according to one embodiment of the present invention includes a first frequency to voltage converter for storing a reference voltage based on a frequency of an incoming signal, and a second frequency to voltage converter for storing a second voltage based on the frequency of the incoming signal, the second voltage being a fraction of the reference voltage. A voltage to frequency converter creates a voltage on a node, the voltage repeatedly varying between about the reference voltage and about the second voltage. From this varying signal, a clock signal can be derived.
26 Citations
22 Claims
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1. A circuit, comprising:
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a first frequency to voltage converter for storing a reference voltage based on a frequency of an incoming signal;
a second frequency to voltage converter for storing a second voltage based on the frequency of the incoming signal, the second voltage being a fraction of the reference voltage;
a voltage to frequency converter coupled to the first and second frequency to voltage converters, the voltage to frequency converter creating a voltage on a node, the voltage repeatedly varying between about the reference voltage and about the second voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for generating a clock signal, comprising:
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storing a reference voltage based on a frequency of an incoming signal;
storing a second voltage based on the frequency of the incoming signal, the second voltage being a fraction of the reference voltage;
creating a voltage on a node, the voltage repeatedly varying between about the reference voltage and about the second voltage; and
generating a clock signal based on the varying voltage on the node. - View Dependent Claims (11, 12, 13, 14)
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15. A circuit, comprising:
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a current source;
a capacitor selectively coupleable to the current source, wherein the capacitor is sequentially charged to a first voltage level and discharged to a second voltage level; and
a counter for counting a number of times the capacitor is charged to the first voltage level, discharged to the second voltage level, or both charged to the first voltage level and discharged to the second voltage level. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for generating a clock signal, comprising:
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creating a voltage on a node, the voltage repeatedly varying between about a reference voltage and about a second voltage, the second voltage being a fraction of the reference voltage; and
counting a number of times the voltage reaches the first voltage level, reaches the second voltage level, or reaches both the first voltage level and the second voltage level. - View Dependent Claims (22)
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Specification