Split input amplifier for protection from DC offset
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United States of America
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Mar 4, 2025
Grant Date -
Feb 1, 2024
app pub date -
Oct 10, 2023
filing date -
Oct 10, 2023
priority date (Note) -
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Abstract
Embodiments presented herein provide apparatus and techniques to reduce a direct current (DC) voltage offset between a transmitter and receiver. Embodiments include a shared reference voltage signal generated by a reference voltage source. The receiver may include a first unit gain buffer to receive a reference voltage signal from the reference voltage source. The transmitter may be communicatively coupled to the receiver via one or more connections and may include a second unit gain buffer communicatively coupled to the first unit gain buffer via one of the connections. An amplifier (e.g., an operation amplifier) of the transmitter may include multiple positive inputs coupled to the second unit gain buffer and an offset tracker. The offset tracker may compensate for a DC offset caused by at least a power supply and/or a ground bounce.
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