| 摘要 |
FIELD: electricity. ^ SUBSTANCE: invention can be used for exciting and damping oscillations of a piezoelectric transducer. In both versions the said device includes a control unit, output stage driver, bridge output stage, high voltage source and amplifying-transforming circuit, connected together in a certain manner, where the bridge output stage consists of two identical push-pull circuits, and each push-pull circuit contains two electronically controlled key elements, damping and current conducting elements. In the first version the device has one differential input and in the second version, it has two electronically switched balance inputs of the amplifying-transforming circuit, connected to the bridge output stage and piezoelectric transducer. ^ EFFECT: increased signal to noise ratio at the input of the reception circuit, wider control range and increased resolution. ^ 4 cl, 4 dwg
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