将制作的锁相放大器应用在了利用声波的相位差定位的系统中。
Then the LIA is used in a system which finds out the location of a sound source.
并根据宽波束超声波流量计的特点重点进行了自动增益控制放大器和跟踪带通滤波器的设计。
Based on the characteristic of the Wide-beam ultrasonic flowmeter, automatic gain control amplifier and the tracking band-pass filter are devised.
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