Multi-channel high precision phase control signal generation device

Abstract

The invention relates to a multi-channel high precision phase control signal generation device which utilizes a programmable read-only memory to generate a customized special circuit in an FPGA (Filed Programmable Gate Array) circuit through a VHDL (Very High Speed Integrated Circuit Hardware Description Language) language programming. The multi-channel high precision phase control signal generation device comprises a phase shift module, a phase coding module, an address coding module and a plurality of multi-channel gates. By taking a high precision active crystal oscillator as an information source, all multi-channel gates works in parallel to receive phase control signals of a host computer and output square wave signals of a multi-channel special phase. The output square wave signals access resonance of a power amplifier to generate sine wave signals with the same frequency and phase with the traditional output signals and the sine wave signals are used for excitation signals of an ultrasonic transducer array element in a phase control type high intensity focusing ultrasonic treatment system; and the frequency of the crystal oscillator is determined by the resonance frequency and the phase control precision requirements of the ultrasonic transducer array element. The invention dramatically increases the channel amount of the phase control signals and enhances the precision of the phase control signals, thereby satisfying the needs of the high intensity focusing ultrasonic treatment system.

Description

technical field [0001] The present invention relates to a signal generating device, in particular to a multi-channel high-precision phase-controlled signal generating device, which is mainly used in high-intensity phase-controlled focused ultrasound treatment systems, and can also be applied to other phase-controlled ultrasonic diagnostic equipment or phase-controlled ultrasonic flaw detection Equipment belongs to the technical field of biomedical engineering. Background technique [0002] The high-precision phase-controlled signal generator is one of the key components of the high-intensity phase-controlled focused ultrasound treatment system. It adjusts the phase value of the signal in each channel, and then passes through the high-power push-pull resonant power amplifier circuit with adjustable amplitude to generate a specific phase excitation signal that controls each array element in the large focal area phased array focused ultrasonic transducer , so that the ultrason...

AI Technical Summary

Problems solved by technology

However, this type of phase-controlled signal generator has disadvantages such as complex circuit, fewer channels, smaller output signal frequency range, and inflexible frequency adjustment. If it is used for phase-controlled focused ultrasound control, the ultrasonic focus control accuracy is relatively low. Low, unable to meet the accuracy requirements of the treatment system when heating the lesion tissue

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