active element in amplifier being vacuum tube

Full Title

Generation of oscillations using amplifier with regenerative feedback from output to input > with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator > the frequency-determining element being part of a bridge circuit in a closed loop in which the signal is transmitted; the frequency-determining element being connected a bridge circuit to such a closed loop, e.g. Wien-Bridge oscillator, parallel-T oscillator > active element in amplifier being vacuum tube

Classification Context

Section:

ELECTRICITY

Class:

ELECTRONIC CIRCUITRY

Subclass:

GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS