换能器由阵列微压电结构组成，这种压电材料在合适频率下的振动能够将电信号转换成超声波。
Transducers are made from arrays of tiny piezoelectric structures that convert electrical signals into ultrasound waves by vibrating at an appropriate frequency.
本课题在此背景下，对电视信号和计算机信号的兼容问题进行了研究并设计了图像转换控制器。
Under this background, this paper focuses on the compatibility of TV signals and computer signals, and designs an image conversion controller.
受限于DDS芯片的调频转换速率，在大带宽下，DDS产生的线性调频信号相比理论信号可能存在频率失真。
Compared to the theory signal, the chirp produced by DDS under large bandwidth, may have frequency distortion due to the limited chirp-rate.
应用推荐