High speed arbitrary waveform generator based on FPGA

An arbitrary waveform and generator technology, applied in the field of high-speed arbitrary waveform generators, can solve the problems that the working frequency of digital circuits can only reach a few hundred MHz, and the working frequency of data phase generating circuits and waveform memory cannot reach the working frequency of DAC.
CN101017383AInactive Publication Date: 2007-08-15็Ž‹ๆ–‡ๅŽ
0 Cites 36 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
็Ž‹ๆ–‡ๅŽ
Publication Date
2007-08-15
Estimated Expiration
Not applicable ยท inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

This invention relates to one high speed random wave generator based on FPGA, which adopts DDS technique with data sample rate more than 1GHz and comprises CPU, parallel data phase generation part, wave shape memory part, plug and filter part, parallel and series conversion circuit and DAC, wherein, the parallel data phase generation adopts parallel process to generate multiple data phase In one time clock to get multiple data; then it uses FPGA series and parallel conversion circuit to output the data to DAC into virtual volume.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a waveform generator, in particular to a FPGA-based high-speed arbitrary waveform generator. Background technique

[0002] The arbitrary waveform generator based on DDS (Direct Digital Synthesis) technology uses high-speed memory as a look-up table, and synthesizes the waveform stored in the memory through high-speed DAC. So it can not only generate common waveforms such as sine, cosine, square wave, triangle wave and sawtooth wave, but also can use various editing methods to generate truly arbitrary waveforms that cannot be generated by traditional function generators.

[0003] Although there are many kinds of structures of the DDS system, its basic circuit principle can be expressed in Figure 1.

[0004] DDS technology is based on the sampling theorem. It first samples the waveform to be generated, digitizes the sampled value and stores it in the memory as a lookup table, then reads the data through the lookup table, and con...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More