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.
Claims30
An integrated circuit device comprising:
- an output driver circuit to output a first signal having a signal level according to a control value;
- and
- a control circuit coupled to receive the first signal from the output driver and adapted to adjust the control value by a first increment until a transition event is detected and to adjust the control value by a second increment after the transition event is detected, the second increment being smaller than the first increment.
A method of operation within an integrated circuit device, the method comprising:
- outputting a first signal having a signal level according to a control value;
- adjusting the control value by a first increment until a transition event is detected;
- detecting the transition event;
- and
- adjusting the control value by a second increment after the transition event is detected.
A variable-precision counter comprising:
- a plurality of storage elements to store a multi-bit count value, each of the storage elements having a toggle input coupled to receive a corresponding one of a plurality of toggle signals, each of the storage elements being adapted to toggle a respective bit of the multi-bit count value if the corresponding one of the toggle signals is in a first state;
- and
- a control circuit to generate the plurality of toggle signals and having a first input to receive a precision control value, the control circuit being adapted to output each of the toggle signals in either the first state or a second state based, at least in part, on the precision control value.
Dependencies are inferred from the claim text.