Ultrasonic endoscope transmitting and receiving front-end device

Abstract

The invention discloses an ultrasonic endoscope transmitting and receiving front-end device. The ultrasonic endoscope transmitting and receiving front-end device comprises a core controller, a delay module, a multi-path pulse transmitting circuit module, an array element gating circuit module, an ultrasonic transducer, a multi-path amplitude limiting module and a receiving front-end circuit module; the core controller is used for controlling the delay module, the array element gating circuit module and the receiving front-end circuit module; under the control of the core controller, the array elements of the ultrasonic transducer which are connected correspondingly are excited through excitation high-voltage pulses emitted by the multi-path pulse transmitting circuit module; the array elements of the ultrasonic transducer all receive echo signals and transmit the echo signals to the multi-path amplitude limiting module; the multi-path amplitude limiting module is provided with output ends used for suppressing influences on the receiving front-end circuit module caused by the excitation high-voltage pulses; the receiving front-end circuit module comprises integrated analog front-end chips used for receiving the control signals of the core controller and receiving ultrasonic echo signals; and after passing through the integrated analog front-end chips, the control signals and the ultrasonic echo signals are outputted to the core controller.

Description

technical field [0001] The invention relates to the field of ultrasonic emission, in particular to an ultrasonic endoscope emitting and receiving front-end device. Background technique [0002] There are two types of scanning methods of the existing ultrasonic array elements: linear stepped array (linear array) and linear phased array (phased array). In linear array scanning, not all array elements can be used at the same time, only part of them is excited each time, and the excitation signal has no delay; in phased array scanning, all array elements are excited and used, and the excitation control signal has a corresponding delay. Time. In the traditional ultrasound system, the circuit has a single function, and the circuit function cannot be fully utilized. [0003] In Patent No. CN201310656528, a receiving front-end device of a portable ultrasonic imaging system is proposed, which improves the design of ultrasonic transmitting circuit and ultrasonic echo filtering part....

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