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US 2015/0309517 A1Published application
On-chip regulator with variable load compensation
AssigneeRambus Inc.
InventorsBrian S. Leibowitz, Michael D. Bucher, Lei Luo, Chaofeng Charlie Huang, Amir Amirkhany, Huy M. Nguyen, Hsuan-Jung (Bruce) Su, John Wilson
Life of this patent
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Abstract
An integrated circuit includes a voltage regulator to supply a regulated voltage and a data output that couples to an unterminated transmission line. The circuit draws a variable amount of power from the voltage regulator according to the data. The voltage regulator includes a first current generation circuit to provide a data transition-dependent current.
Claims21
(canceled)
A transmitter integrated circuit comprising:
- a voltage regulator to supply a regulated voltage;
- an equalizing output driver circuit for transmitting data at a signal swing corresponding to the regulated voltage and a load current;
- wherein the voltage regulator comprises a feedback current source coupled to the equalizing output driver circuit to provide a closed-loop current to the driver at a constant level based on an expected current for transmission of a non-equalization signal, and wherein the voltage regulator further comprises a feed-forward current source coupled to the equalizing output driver circuit in parallel with the feedback current source, the feed-forward current source responsive to an equalization signal input to selectively supply a calibrated current for summation with the closed-loop current at the equalizing output driver circuit.
A transmitter circuit comprising:
- a driver circuit to transmit data;
- and
- a voltage regulator to provide a regulated voltage for the driver circuit, the voltage regulator including
- a source of a calibrated load current;
- and
- a source of supplemental current based on at least one data dependent loading condition.
3 more elements
An integrated circuit comprising:
- a voltage regulator to supply a regulated voltage;
- a circuit to process data, the circuit having an output for coupling to an unterminated transmission line, the circuit drawing a variable amount of power from the voltage regulator according to transitions in the data;
- wherein the voltage regulator comprises an open-loop current generation circuit to provide a data transition-dependent current.
Dependencies are inferred from the claim text.