.200 Mhz, Handheld The Scopemeter Digital System Power Supply Module

As a common test instrument in time domain, Digital Storage Oscilloscope has been widely used in various fields. Besides all the functions and the advantages that the Digital Storage Oscilloscope possesses, ScopeMeter have the functions of Digital Multi-Meter. Due to the features of small volume, little weight, low power consumption and built-in battery, ScopeMeter is especially fit for the field environment, no-power system, mobile occasion.Based on the project"200MHz Handheld ScopeMeter", this dissertation focuses on the design of digital system,discusses the whole scheme of ScopeMeter, the circuit of data acquisition system in detail, and the design of power module.The main attributions of this dissertation include:1. The design of data acquisition system. It is the core of Digital Storage ScopeMeter. Based on the DSP+FPGA structure, the ScopeMeter with the equivalent sampling frequency of 10 GSPS, bandwidth of 200 MHZ is developed by adopting real-time sampling and random sampling. The pulse width trigger circuit, trigger delay circuit are discussed. And a new kind of peak detection module which is implemented by Verilog HDL in FPGA and greatly enhances the performance of catching glitch is discussed in the dissertation. The waveform recorder function accomplished in the ScopeMeter can test, monitor slow analog signals and record the characteristic value of signals continuously for a long time.2. The accomplishment of Digital Multi-Meter(DMM) module. Multi-Meter integrated in ScopeMeter can implement the measure of voltage, current, resistance, and diode. And it extends the function of ScopeMeter and offers more facility for users. In addition,the DMM module offers hardware...