Systems and methods for adjusting an output driver
AssigneeHewlett-Packard Development Company, L.P.
InventorBoris N. Martinez
Life of this patent
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Abstract
Systems and methods for dynamically adjusting an output driver are invented and disclosed. One embodiment comprises receiving a first signal. Applying the first signal to a first tuning element to generate a reference signal. Receiving a second signal. Applying the second signal to a second tuning element to generate a test signal, wherein the second tuning element is configured similarly to the first tuning element. Sampling the reference signal to generate a time-sampled reference signal. Sampling the test signal to generate a time-sampled test signal. Integrating the time-sampled reference signal and the time-sampled test signal to generate an error signal. Then, applying the error signal to adjust an output driver.
Claims20
A method for adjusting an output driver, the method comprising the steps of:
- receiving a first signal;
- applying the first signal to a first tuning element to generate a reference signal;
- receiving a second signal;
- applying the second signal to a second tuning element to generate a test signal, wherein the second tuning element is configured similarly to the first tuning element;
- sampling the reference signal to generate a time-sampled reference signal;
- sampling the test signal to generate a time-sampled test signal;
- integrating the time-sampled reference signal and the time-sampled test signal to generate an error signal;
- and
- applying the error signal to adjust an output driver.
A system, comprising:
- a reference driver coupled to a first tuning element, the reference driver and the first tuning element configured to receive a first input signal and generate a reference signal comprising a primary reference component and a reflected reference component;
- a test driver coupled to a second tuning element, the test driver and the second tuning element configured to receive a second input signal and generate a test signal comprising a primary test component and a reflected test component;
- an integrator configured to receive the reference signal and the test signal and generate an error signal.
A system for adjusting an output driver to reduce the effect of impedance mismatches between signal sources and signal traces, comprising:
- means for generating a reference signal responsive to a first input signal, wherein the reference signal emulates signal reflections due to a characteristic impedance of transmission lines in the system;
- means for generating a test signal responsive to a second input signal that enables signal reflections responsive to second input signal transitions and the characteristic impedance of transmission lines in the system to dampen before subsequent second input signal transitions;
- and
- means for generating an error signal responsive to the reference signal and the test signal.
Dependencies are inferred from the claim text.