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US 11,908,544 B2Granted
Apparatuses and methods for setting a duty cycle adjuster for improving clock duty cycle
OwnerKang-Yong Kiminventor
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Abstract
Apparatuses and methods for setting a duty cycler adjuster for improving clock duty cycle are disclosed. The duty cycle adjuster may be adjusted by different amounts, at least one smaller than another. Determining when to use the smaller adjustment may be based on duty cycle results. A duty cycle monitor may have an offset. A duty cycle code for the duty cycle adjuster may be set to an intermediate value of a duty cycle monitor offset. The duty cycle monitor offset may be determined by identifying duty cycle codes for an upper and for a lower boundary of the duty cycle monitor offset.
Claims20
A method comprising:
- reading duty cycle results for a first duty cycle code from a mode register, wherein the duty cycle results indicate a first adjustment;
- and
- writing a second duty cycle code for the duty cycle adjuster to the mode register when the duty cycle results indicate a change associated with the first duty cycle code, wherein the second duty cycle code is associated with a second adjustment.
A method comprising:
- monitoring a duty cycle of a clock signal;
- writing a duty cycle result to a mode register based on the monitoring;
- receiving a duty cycle adjuster code;
- and,
- adjusting the duty cycle of the clock signal based on the duty cycle adjuster code.
2 more elements
A method comprising:
- issuing a first mode register write command to write a first duty cycle adjuster code associated with a first step size to a first mode register to set a duty cycle adjuster circuit;
- issuing a second mode register write command to write a first value to first opcode of a second mode register to start a duty cycle monitor operation;
- issuing a third mode register write command to write a second value to the first opcode to stop the first duty cycle monitor operation;
- and
- issuing a first mode register read command to read duty cycle results from the duty cycle monitor operation.
2 more elements
Dependencies are inferred from the claim text.