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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H03F3/34
DC amplifiers in which all stages are DC-coupled
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H03F3/343
with semiconductor devices only
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H03F3/345
with field-effect devices
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H03F3/3455
with junction-FET's
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