Research into continuity of D/A conversion output;

D/A conversion of control data was completed PCL-812PG multi-function card to output analog voltage that controls the flux of hydraulic pump.

The amplitude-frequency characteristic of DDS signal is analyzed after D/A conversion firstly.

The connection of the high performance 14 bits D/A convert chip MX7534 and 24 bits D/A convert chip AD7714 with microcomputer 89C51, and the principle of control system of the high precision stabilized power supply consisted of these components were discussed.

Using Complex Programmable Logic Device(CPLD) as its key component,and aided by a input control module,a D/A transformation module and a digital displaying module,this signal generator can output increasingly slopped wave,decreasing wave,triangular wave,ladder wave,sinusoidal wave and square wave.

This paper introduces the designing thought of medular constant-current circuits,including the D/A transformation functions,and new-made current regulators.

Multi-channel DAC LTC2704-16 and its application;

ADC and DAC is the essential part of control system.

Due to the attribute of high-speed transmission of PCI,a PCI-bus-based data acquisition board with multiple ADC&DAC Channels can meet the requirement of data transmission under high-speed conversion.