Edge-aligned ratio counter
First Claim
1. A circuit comprisingat least one processor coupled to at least one counter circuit,the at least one counter circuit receiving one of a first value and a second value in response to a first clock signal and generating a control signal under control of the received value,the at least one counter circuit counting pulses of the first clock signal and a second clock signal and capturing the count of each of the first and the second clock signals in response to the control signal and determining a ratio between a frequency of the first clock signal and a frequency of the second clock signal using the captured count.
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Accused Products
Abstract
An Edge-Aligned Ratio Counter (EARC) that includes at least one processor coupled to at least one counter circuit is provided for determining a ratio between two clock signals by receiving a first and a second value in response to a first clock signal and generating a control signal under control of the loaded value by counting the pulses of the first clock signal and a second clock signal and captures the count of each clock signal in response to the control signal and determining a ratio between a frequency of the first clock signal and a frequency of the second clock signal using the differences of the captured counts taken at two different occurrences of the control signal.
6 Citations
31 Claims
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1. A circuit comprising
at least one processor coupled to at least one counter circuit, the at least one counter circuit receiving one of a first value and a second value in response to a first clock signal and generating a control signal under control of the received value, the at least one counter circuit counting pulses of the first clock signal and a second clock signal and capturing the count of each of the first and the second clock signals in response to the control signal and determining a ratio between a frequency of the first clock signal and a frequency of the second clock signal using the captured count.
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17. A device comprising:
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at least one processor; at least one memory area coupled to the at least one processor and storing values representative of a first clock signal and a second clock signal; and at least one counter circuit coupled to the at least one processor and selectively receiving the stored values and generating a control signal under control of the stored values, the at least one counter circuit counting pulses of the first and the second clock signals, capturing the count of each of the first and the second clock signals in response to the control signal and determining a ratio between a frequency of the first and the second clock signals using the captured count. - View Dependent Claims (18, 19, 20, 21)
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22. A device comprising:
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means for receiving one of a first and second value in response to a first clock signal; means for generating a control signal under control of the received value; means for counting pulses of a first clock signal and a second clock signal and capturing the count of each of the first and second clock signals in response to the control signal; means for determining a ratio between a frequency of the first clock signal and a frequency of the second clock signal using the captured count; and means for generating the control signal when a transitional edge of the first clock signal is approximately coincidental with a transitional edge of the second clock signal. - View Dependent Claims (23, 24)
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25. A method comprising:
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receiving one of a first and a second value in response to a first clock signal; generating a control signal under control of the received value; counting pulses of the first clock signal and a second clock signal and capturing the count of each clock of the first and the second dock signals in response to the control signal; and determining a ratio between a frequency of the first clock signal and a frequency of the second clock signal using differences of successive captured counts, respectively. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification