Ad conversion circuit, semiconductor device, and ad conversion method
First Claim
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1. An AD conversion circuit comprising:
- a reference voltage generator which generates a reference voltage at the time of sampling a received input signal; and
a sampling time controller which detects a change in the reference voltage, which determines at the time of the reference voltage rising to a determined threshold that sampling is completed, and which generates a sampling clock in which sampling time is controlled on the basis of an external clock.
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Abstract
A reference voltage generator generates a reference voltage at the time of sampling a received input signal. A sampling time controller detects a change in the reference voltage. When the reference voltage rises to a determined threshold, the sampling time controller determines that sampling is completed, and generates a sampling clock in which sampling time is controlled on the basis of an external clock.
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Citations
7 Claims
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1. An AD conversion circuit comprising:
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a reference voltage generator which generates a reference voltage at the time of sampling a received input signal; and a sampling time controller which detects a change in the reference voltage, which determines at the time of the reference voltage rising to a determined threshold that sampling is completed, and which generates a sampling clock in which sampling time is controlled on the basis of an external clock. - View Dependent Claims (2, 3)
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4. A semiconductor device comprising an AD conversion circuit, the AD conversion circuit including:
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a reference voltage generator which generates a reference voltage at the time of sampling a received input signal; and a sampling time controller which detects a change in the reference voltage, which determines at the time of the reference voltage rising to a determined threshold that sampling is completed, and which generates a sampling clock in which sampling time is controlled on the basis of an external clock. - View Dependent Claims (5, 6)
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7. An AD conversion method comprising:
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detecting a change in a reference voltage at the time of sampling a received input signal; and determining at the time of the reference voltage rising to a determined threshold that sampling is completed, and generating a sampling clock in which sampling time is controlled on the basis of an external clock.
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Specification