Driving circuit of transformer, driving device of ultrasonic transducer and ultrasonic transducer

Through the control of the operational amplifier feedback loop and dual current source dual switches, the problem of weak gate drive capability of the power tube in the ultrasonic transducer drive circuit is solved, the power tube can be quickly turned on and off, the signal stability and accuracy are improved, and the risk of false triggering is reduced.

CN120601731AActive Publication Date: 2025-09-05SUZHOU NOVOSENSE MICROELECTRONICS CO LTD
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Patent Information

Application Number
CN202511094325.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-06
Publication Date
2025-09-05
Estimated Expiration
2045-08-06

AI Technical Summary

Technical Problem

In existing ultrasonic transducer drive circuits, weak gate drive capability during power tube commutation causes drain voltage coupling, which leads to oscillation and affects the stability and accuracy of the output signal.

Method used

The feedback loop of the operational amplifier and the control of dual current sources and dual switches are used to accurately adjust the control terminal voltage of the power tube to achieve rapid turn-on and turn-off of the power tube. Through the coordination of the current source, switch and operational amplifier, the stability during the rapid turn-on process is ensured and the risk of false triggering during the rapid turn-off process is reduced.

Benefits of technology

The rapid on-and-off of the power tube is achieved, which ensures the stability and accuracy of the output signal, reduces the risk of false triggering, and improves the overall performance of the ultrasonic transducer drive circuit.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a driving circuit of a transformer, a driving device of an ultrasonic transducer and the ultrasonic transducer, and relates to the technical field of electronics. The transformer comprises a primary side port, the driving circuit comprises a power tube, the power tube is turned on and turned off to drive the transformer, a first operational amplifier, a first current source, a first switch and a second switch, in a first state, the first current source outputs first current, the first switch is turned on to enable the power tube to be turned on, and in a second state, the first current source outputs second current, and the second switch is turned off to enable the power tube to be turned on. And the second current source outputs a second current, and the second switch is switched on, so that the power tube is switched off. By adopting the scheme provided by the embodiment of the invention, the problem of oscillation caused by drain voltage coupling due to weak grid driving capability during phase change of the power tube in the driving circuit of the existing transformer can be solved, and the output signal stability in the switching process of the power tube is ensured.
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Citation Information

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