Sine wave generation circuit and audio shield

A technology for generating circuits and sine waves, applied in the field of communication, can solve the problems of complex sine wave generation circuit structure and design scheme, high design cost, and achieve the effects of low design cost, improved speed and reliability, and simple and reasonable circuit structure

Active Publication Date: 2014-04-09
北京明华联盟科技有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most audio shields generate sine wave signals through sine wave generation circuits, and send the sine wave signals to audio equipment to communicate with audio equipment. However, the existing sine wave generation circuits conve

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
  • Sine wave generation circuit and audio shield
  • Sine wave generation circuit and audio shield
  • Sine wave generation circuit and audio shield

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] The invention proposes a sine wave generating circuit.

[0036] refer to figure 1 , figure 1 It is a functional block diagram of an embodiment of the sine wave generating circuit of the present invention.

[0037] In this embodiment, the sine wave generating circuit includes a power input terminal Vin, a microcontroller 10 , a waveform generating module 20 , a filter shaping module 30 and a sine wave output terminal Vout. The power supply input terminal Vin is used to input the power supply voltage VCC, the power supply voltage VCC is the working voltage (such as 3.3V) required for the normal operation of the sine wave generating circuit, and the microcontro...

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 discloses a sine wave generation circuit and an audio shield having the sine wave generation circuit. The sine wave generation circuit comprises a power source input end, a micro controller, a waveform generation module, a filtering shaping module and a sine wave output end. According to the sine wave generation circuit, high level or low level signals are sequentially outputted through at least two input/output ports within a quarter of a sine period by the micro controller while square wave signals with successively-increased amplitude or successively-decreased amplitude are correspondingly generated by the waveform generation module within the quarter of the sine period, after filtering and shaping the square wave signals through the filtering shaping module, sine wave signals are outputted, so when the audio shield and audio equipment carry out communication, the stable and smooth sine wave signals are outputted by the sine wave generation circuit to the audio equipment to improve the communication speed and communication reliability of the audio shield, moreover, the sine wave generation circuit has advantages of no need for D/A conversion, simple and reasonable circuit structure and low design cost.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a sine wave generating circuit and an audio shield. Background technique [0002] At present, most audio shields generate sine wave signals through sine wave generation circuits, and send the sine wave signals to audio equipment to communicate with audio equipment. However, the existing sine wave generation circuits convert digital square waves into The signal is converted into an analog sine wave signal. The structure and design scheme of the sine wave generation circuit realized by D / A conversion are relatively complicated, and the design cost is relatively high. Contents of the invention [0003] The main purpose of the present invention is to propose a sine wave generating circuit and an audio shield, aiming at simplifying the structure of the sine wave generating circuit, reducing the design cost, and improving the speed and reliability of the audio shield communicat...

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
IPC IPC(8): H03K3/80
Inventor 陈柳章
Owner 北京明华联盟科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap