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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H03F3/45632
in differential amplifiers with FET transistors as the active amplifying circuit
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H03F3/45775
by using cross switches
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