In the data acquisition system, the input analog signal generally needs to be added with a preamplifier to achieve port impedance matching and make the analog voltage output by the amplifier suitable for the voltage range of the analog-to-digital converter. In automatic measurement and control systems and intelligent instruments, if the dynamic range of the signal is large, in order to ensure the necessary measurement accuracy, the method of changing the range is often used, and the gain of the measurement amplifier should be changed accordingly.
The programmable gain amplifier can realize the automatic switching of range or the homogenization of full range. Ys-vga has four independent high dynamic range (0 ~ 80dB) ultrasonic receiving channels, and the minimum gain step of each channel can be set to 0.1db/2db/6db respectively. Through a USB communication interface, the software can accurately control the gain and bandwidth of each channel in real time. The amplifier indicators meet the relevant standards of European standard en12668-1.