Signal control circuit, information processing apparatus, and duty ratio calculation method
AssigneeFujitsu Limited
InventorsKatsuhiko Ookubo, Michitaka Hashimoto, Noriyuki Tokuhiro
Life of this patent
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Abstract
A signal control circuit includes: a delay acquisition circuit configured to obtain a first delay amount to be added to an input signal for aligning timing of rise of the input signal with timing of fall or rise of a reference signal and a second delay amount to be added to the input signal for aligning timing of fall of the input signal with timing of the fall or the rise of the reference signal; and a ratio calculation circuit configured to calculate a duty ratio of the input signal based on a difference between the first delay amount and the second delay amount.
Claims6
A signal control circuit, comprising:
- a delay acquisition circuit configured to obtain a first delay amount to be added to an input signal for aligning timing of rise of the input signal with timing of fall or rise of a reference signal and a second delay amount to be added to the input signal for aligning timing of fall of the input signal with timing of the fall or the rise of the reference signal;
- and
- a ratio calculation circuit configured to calculate a duty ratio of the input signal based on a difference between the first delay amount and the second delay amount.
An information processing apparatus, comprising:
- an operation circuit;
- and
- a memory controller, wherein
- the memory controller includes:
- a delay acquisition circuit configured to obtain a first delay amount to be added to an input signal for aligning timing of rise of the input signal with timing of rise or fall of a reference signal and a second delay amount to be added to the input signal for aligning timing of fall of the input signal with timing of the rise or the fall of the reference signal, and
- a data capturing circuit configured to capture data from a memory using a signal formed by adding the first delay amount to the input signal;
- the operation circuit includes:
- an operation processing circuit configured to process data received from the data capturing circuit, and
- a ratio calculation circuit configured to calculate a duty ratio of the input signal based on a difference between the first delay amount and the second delay amount.
A duty ratio calculation method, comprising:
- obtaining a first delay amount to be added to an input signal for aligning timing of rise of the input signal with timing of fall or rise of a reference signal;
- obtaining a second delay amount to be added to the input signal for aligning timing of fall of the input signal with timing of the fall of the reference signal;
- and
- calculating a duty ratio of the input signal based on a difference between the first delay amount and the second delay amount.
Dependencies are inferred from the claim text.