Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for generating amplitude continuous variable signal without D/A converter

A signal generation and converter technology, which is applied in the parts, instruments, and measurement of electrical variables of electrical measuring instruments to achieve the effect of convenient generation.

Inactive Publication Date: 2008-09-03
HARBIN ENG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the method that utilizes the fundamental frequency signal of the pulse to add the low-pass filter to produce the output amplitude continuously variable signal has not yet seen the report of any form of literature data

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for generating amplitude continuous variable signal without D/A converter
  • Method for generating amplitude continuous variable signal without D/A converter
  • Method for generating amplitude continuous variable signal without D/A converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The concrete implementation method of the present invention is: pulse signal generating circuit 1 of the present invention adopts single-chip microcomputer or digital signal processing chip (DSP), or adopts direct digital frequency synthesis (DDS) device; Low-pass filter 2 adopts cut-off frequency as fundamental frequency low-pass filter, or a band-pass filter.

[0012] When the signal source outputs a large signal, the pulse signal generating circuit 1 generates a symmetrical square wave signal 3 with a duty ratio of 1:1 and the same frequency as the sine wave signal to be output. After passing through the low-pass filter 2, the output is a Sine wave signal 4, see appendix figure 2 ; When the signal source wants to change the output signal amplitude, the pulse signal generating circuit 1 only needs to change the duty cycle of the output pulse, and after passing through the low-pass filter 2, the sine wave 4 with amplitude change can be obtained. When the signal source...

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

PUM

No PUM Login to View More

Abstract

The invention relates to a generation method of signal with continuously variable amplitude without the use of D / A converter. The method uses the base frequency component of impulse signal as the output signal of a signal source, changes the dutyfactor of the output impulse of an impulse signal generating circuit to change the amplitude of the output signal, therefore generating sine wave signal with variable amplitude without the need of a D / A converter, making the signal source has the characters of simpleness, agility, small signal output amplitude and low cost. The invention not only can generate sine wave signal, but also can generate CW impulse signal and linear frequency modulation signal, as well as other periodic signals, which is specially adapted for the special regulation signal sources of electronic appliance.

Description

technical field [0001] The invention belongs to a signal generating method. It particularly relates to a signal generation method in a signal source (signal generator) that does not use a D / A converter and has continuously variable signal amplitude. Background technique [0002] In the development process of electronic equipment, signal sources are often needed to debug the equipment. The digital signal sources (signal generators) currently seen are all converted from digital signals to analog signals by D / A converters. The range of output amplitude of analog signals depends on the number of bits of D / A converters. If you want to make the output amplitude of the signal very small, you must use a high-digit D / A converter, and the more bits of the D / A converter, the higher the cost, especially the high-speed D / A converter, the cost is very high. high. At present, the price of a signal source capable of generating a signal with an amplitude below 1mV is about ten times highe...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H03K5/08G01R1/28
Inventor 卢逢春孙大军兰华林张殿伦曹忠义
Owner HARBIN ENG UNIV