.~.~> Filamentary cathodes heated by anode current or anode supply source
DEFINITION
Classification: 330/200
(under subclass 199) Subject matter where the power supply or bias means is for an amplifier comprising two or more stages of amplification.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3, for plural diverse type amplifying devices which may involve power supply or bias means.
88+, 92, and 98+, for cascaded signal feedback amplifiers which may involve power supply or bias means.
123, for push-pull amplifiers, which may be cascaded, having significant bias or power supply means.
124, for plural amplifier channels which may involve cascaded amplifiers having significant power or bias supply means.
133, for different bias controls for different stages of a cascaded amplifier. 150, for cascaded amplifiers with different characteristics which may be different bias means or voltages.
152+, for cascaded amplifiers, differently coupled between stages, which may involve circuitry for the bias or power supply means also.
157+, for amplifiers with interstage coupling circuits which may involve circuitry for the bias or power supply means also.
296+, for plural stage semiconductor amplifiers involving bias or power supply circuitry.
