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 lumped inductance and capacitance > the frequency-determining element being connected a bridge circuit to a closed loop in which the signal is transmitted > 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