Design And Implementation Of Arbitrary Waveform Generator Based On Analog IC Automatic Tester

Analog IC automatic equipment(ATE) can test the functional and electrical parameters of analog ICs. Arbitrary waveform generator(AWG) is a functional module of the IC ATE. It provides test signal for ICs under test. The task of this subject is to design an AWG which contains both arbitrary mode(ARB mode) and high frequency sine mode(HFS mode). ARB mode can output any waveforms. Its resolution is 16 bits. The sampling rate is up to 160 MHz. The largest frequency of output is 1MHz at ARB mode. HFS mode only outputs sine signal and the largest output frequency is 150 MHz. The peak-peak value range is 20mV~20V, amplitude offset range is-2.5V~+2.5V, output load is selectable between 50? and 75?. AWG is also with a synchronous output port.Another task of this subject is to design and implement the User Interface based on Analog IC ATE. User Interface can choose the resources of ATE, create and compile test program, execute the users’ programs(.exe file), control the ATE to work automatically, communicate with the prober. The interface also can display and process the test result, simultaneously save test information.The design of AWG is base on the theory of Direct Digital Synthesis(DDS), it adopts a concept of modular design with the Xilinx Spartan-6 LX100 FPGA as the system controller. The hardware circuit contains eight parts. ARB mode uses DAC and RAM to generate waveforms. HFS mode selects a DDS ASIC to get sine wave. ARB Mode including signal feedback circuit which HFS Mode module does not include. The design of users’ operator interface of Analog IC automatic tester is based on Visual Studio2008 platform and select C# to implement.This topic finally completed the design and debug of hardware circuits of arbitrary waveform generator for both modes. It also completed the Verilog code of FPGA logic control. With the joint working of software and hardware, the final test results are acceptable to AWG. About the users’ interface, it also completed the design and debug and implemented the basic functions.