IPC Subgroup
H03F 3/38 DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
Introduced: September 1968
Last revised: January 2006
Full Title
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- AMPLIFIERS
Related Keywords
CHOPPER(S) in D. C. amplifiers
2 direct subcodes
Child Classifications
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- H03F 3/387 with semiconductor devices only
- H03F 3/4 with tubes only