Circuitry and method for quantization error correction for time synchronization
AssigneeAdvanced Micro Devices, Inc.
InventorsMing So, Jian Liu
Life of this patent
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Abstract
A method of operating an electronic device is disclosed. The method includes generating an initial time value, generating an initial time stamp based on the initial time value, and transmitting the initial time stamp. The initial time stamp has a number of bits. For a set period of time, the time stamp is updated and the updated time stamp is transmitted from the electronic device. After the set period of time, the time stamp is adjusted by a residual time amount and the adjusted time stamp is transmitted from the electronic device. Other implementations are disclosed.
Claims20
An electronic device comprising a time management unit for use in a synchronous electronic system, wherein the time management unit comprises:
- a main timer for storing a number of bits indicating a time;
- a residual timer for storing additional bits indicating lower significant digits of the time;
- digital circuitry coupled to the main timer and the residual timer;
- and
- a digital output designed to output time information from the main timer to a serial bus.
An electronic device comprising a time management unit for use in a synchronous electronic system, wherein the time management unit comprises:
- a main timer for storing a number of bits indicating a time;
- a residual timer for storing additional bits indicating lower significant digits of the time;
- digital circuitry coupled to the main timer and the residual timer, the digital circuitry being designed to
- detect whether a time correction is needed,
- in response to detecting that a time correction is not needed, update the main timer by a clock period, and
- in response to detecting that a time correction is needed, update the main timer by a clock period and a correction value from the residual timer;
- and
- a digital output designed to output time information from the main timer to a serial bus.
An electronic device comprising a time management unit for use in a synchronous electronic system, wherein the time management unit comprises:
- a main timer for storing a number of bits indicating a time;
- a residual timer for storing additional bits indicating lower significant digits of the time, the additional bits representing a fractional portion of the time that is not represented in the main timer;
- digital circuitry coupled to the main timer and the residual timer;
- and
- a digital output designed to output time information from the main timer to a serial bus.
Dependencies are inferred from the claim text.