Output calibrator with dynamic precision
AssigneeRambus Inc.
InventorsKueck Hock Lee, Andy Peng-Pui Chan
Life of this patent
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Abstract
An integrated circuit device having an output driver circuit and a control circuit. The output driver circuit outputs a first signal having a signal level according to a control value. The control circuit is coupled to receive the first signal from the output driver and adjusts the control value by a first increment until a transition event is detected. After the transition event is detected, the control circuit adjusts the control value by a second increment, the second increment being smaller than the first increment.
Claims22
An integrated circuit device comprising:
- an output driver circuit to output a first signal having a signal level according to a control value;
- a storage circuit to store a value that represents a number of times to adjust the control value by a first increment before reaching a transition event;
- and
- a control circuit coupled to receive the first signal from the output driver and to adjust the control value by a first increment until the transition event is detected, and the control circuit to adjust the control value by a second increment after the transition event is detected, wherein the second increment is smaller than the first increment.
A method of operation within an integrated circuit device, the method comprising:
- storing a value that represents a number of times to adjust a control value by a first increment before reaching a transition event;
- outputting a first signal having a signal level according to the control value;
- adjusting the control value by the first increment until the transition event is detected;
- detecting the transition event;
- and
- adjusting the control value by a second increment after the transition event is detected, wherein the second increment is smaller than the first increment.
Dependencies are inferred from the claim text.