ULTRASOUND TRANSISTOR OSCILLATOR Russian patent published in 1997 - IPC

FIELD: transducers for processes which use ultrasound. SUBSTANCE: device has input voltage divider, which has serial circuit of two capacitors, two transistors which are connected in series, power transformer which primary winding is connected between middle tap of input voltage divider and common point of transistors. In addition device has switching transformer, which secondary windings are connected between bases and emitters of transistors and which primary winding is connected to one winding of power transformer, which secondary winding terminals are output terminals of device. In addition device has output current and voltage detectors, gate phase detector, controlled gate, serial LC- circuit, and additional capacitor, so that outputs of current and voltage detectors are connected to first and second inputs of gate phase detector, which output is connected to control input of gate, which output switches additional capacitor in parallel to capacitor of LC circuit which is connected to primary winding of switching transformer. EFFECT: reliable operations with sharp-resonance abrupt-changing load, increased reliability, increased functional capabilities. 2 dwg