The principle of the high-speed USB 2.0 bus is introduced. The USB peripheral controller-CY7C68013 and the high-speed A/D convert chip are used to achieve the high-speed A/D sampling and lay a foundation for the high-speed USB application.
It also explores using a SCM system formed by 89C51 SCM and TLC5615CP D/A convert chip to realize the velocity control of the varactors, to display the live concussion frequency and the peak-to-peak value.
The data acquisition circuit utilizes an AT89C55 chip,a light-to-electricity coder,an inductance-triggered displacement sensor and an A/D convert chip CS5522 and can collect data automatically,then under the environment of Windows,VB6 is used to process the data.
This paper just focus on how to development a simple data acquisition system based on USB.Firstly, this paper introduces the USB 1.1 specification, especially focusing on the transfer type and bus protocol of USB. Then it introduces the way to build up a data acquisition system (both hardware and software), and this system use PDIUSB12 as the USB interface chip, AT89C52 as the Microprocessor, and ADC0809 as the A/D convert chip.
This article introduces a kind of control circuit which uses FPGA to accomplish highspeed A/D transforming chip, discusses the design principles of this control circuit, and puts forward a linking method which can resolve highspeed A/D sampling and relative lowspeed microprocessor data procession.
介绍了一种用 F PGA实现对高速 A / D转换芯片的控制电路 ,讨论了这一控制电路设计思想 ,提出了更好的解决高速 A/ D采样与较慢速的单片机数据处理间的链接方法。
In the design of a new flow totalizing instrument with ARM S3C44B0X as the core processor,A/D converter chip ADS1110 has been extended by using I~2C bus interface module provided by ARM itself,thus the data acquisition system with high accuracy is composed.
It de- scribed the performance and work principle of the main chips, the front circuit of A/D converter chip,the interface of A/D converter chip and DSP chip ,the serial communication scheme design of DSP chip and PC ,the memory expend of DSP chip. At last,it gave the structure and optimize of software.