An improved square-wave oscillator circuit

Abstract
Summary form only given. The requirements for an oscillator may be met in a low-power feedback circuit rather than in the high-power output circuit. A small saturable transformer is used to supplythe transistor drive requirements in the improved squarewave oscillator circuit. The feedback transformer derives its primary power for sufficient positive feedback from the output circuit either as a voltagedependent signal, a current-dependent signal, or a combination of both. Mter a period of time, the feedback transformer core saturates and the impedance of the feedback circuit causes a reduction in feedback power. Consequent! y, the loop gain becomes less than unity and the energy stored in the feedback circuit or in the output circuit institutes reversai. With this circuit, oscillator performance can be improved and the severity of duty on the transistor appreciably reduced.

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