Transitron Oscillator definition of Transitron Oscillator in the Free Online Encyclopedia.

transitron oscillator [′tran·sə‚trän ′äs·ə‚lād·ər]

(electronics)

A negative-resistance oscillator in which the screen grid is more positive than the anode, and a capacitor is connected between the screen grid and the suppressor grid; the suppressor grid periodically divides the current between the screen grid and the anode, thereby producing oscillation.

Transitron Oscillator

a device for the generation of electrical oscillations by means of a multigrid electron tube (for example, a pentode) that, when operating, has a negative trans-conductance between the screen grid and the cathode. A transitron oscillator is excited when the absolute value of the transcon-ductance is equal to or more than the alternating-current resistance of the oscillatory circuit connected to the screen grid and the cathode. The frequencies of the oscillations generated in a transitron oscillator may range from a few hertz to several hundred megahertz. Since it has high frequency stability, the transitron oscillator has been used mainly as a master oscillator in radio transmitters and as a local oscillator in superheterodyne radio receivers. By the 1970’s, the transitron oscillator was superseded by semiconductor oscillators.

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Transitron Oscillator

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