Ultrasonic transmitter with low distortion and simultaneous reception

The transformer-based transceiver circuit in ultrasound systems addresses the limitations of conventional designs by enabling high-power, low-distortion transmission and simultaneous reception, enhancing waveform accuracy and reducing power consumption.

JP7770593B2Active Publication Date: 2025-11-14VERASONICS INC
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Patent Information

Application Number
JP2024568114
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-05-18
Filing Date
2023-05-17
Publication Date
2025-11-14
Estimated Expiration
2043-05-17

AI Technical Summary

Technical Problem

Conventional ultrasound systems face limitations in transmitting high-power, high-frequency arbitrary waveforms with low distortion and monitoring the transmitted signal during transmission due to the use of a single T/R switch, which causes distortion, a transmit/receive dead zone, and power limitations.

Method used

The implementation of a transformer-based transceiver circuit that eliminates the T/R switch, utilizing an H-bridge circuit and an active clamp circuit to generate high-power, high-frequency arbitrary waveforms with low distortion and monitor the transmitted signal, allowing simultaneous transmission and reception.

Benefits of technology

Enables high-power, low-distortion ultrasound transmission with the ability to monitor the signal during transmission, eliminating the dead zone and reducing power consumption, while preventing electric shock hazards and improving waveform accuracy.

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Abstract

An ultrasonic transceiver that overcomes many of the drawbacks of conventional ultrasonic transceivers by providing the ability to transmit arbitrary waveforms with low distortion, high power, and high frequency, and the ability to monitor the transmitted signal via a receiver during the transmission period. The transceiver circuit includes a transducer element that emits an ultrasonic signal and receives the reflected ultrasonic signal, a transformer circuit having a transformer with a secondary winding and a primary winding coupled to the transducer element, an H-bridge transmission waveform circuit coupled to the primary winding of the transformer to generate a transmission waveform signal to the transducer element via the transformer, an FET clamp coupled to the secondary winding of the transformer, and a receiver circuit having an input coupled to the FET clamp.
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