Patent classifications
H
ELECTRICITY
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H03
ELECTRONIC CIRCUITRY
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H03F
AMPLIFIERS
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3/00
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
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H03F3/45071
with semiconductor devices only
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H03F3/45479
characterised by the way of common mode signal rejection
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H03F3/4578
in differential amplifiers with BiFET transistors as the active amplifying circuit
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H03F3/4578

DECISION FEEDBACK EQUALIZER (DFE) SUMMER
20250233567 · 2025-07-17 ·

A summer includes a first transconductance amplifier, a first switch coupled to a first input of the summer, a second switch coupled to a second input of the first transconductance amplifier, and a transimpedance amplifier. A first output of the first transconductance amplifier is coupled to a first input of the transimpedance amplifier, and a second output of the first transconductance amplifier is coupled to a second input of the transimpedance amplifier. The summer also includes a second transconductance amplifier. A tap input of the second transconductance amplifier is configured to receive a first digital code indicating a level decision for a first previous symbol, a first output of the second transconductance amplifier is coupled to the first input of the transimpedance amplifier, and a second output of the second transconductance amplifier is coupled to the second input of the transimpedance amplifier.