Patent classifications
H
ELECTRICITY
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H03
ELECTRONIC CIRCUITRY
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H03G
CONTROL OF AMPLIFICATION
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3/00
Gain control in amplifiers or frequency changers
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H03G3/30
in amplifiers having semiconductor devices
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H03G3/3052
in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
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H03G3/3068
Circuits generating control signals for both R.F. and I.F. stages
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