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Video image data acquisition method study
Tuesday, October 6th, 2009 at 06:44 | No commentsCategories: DSPShort Content: The video image gathering method are many, divides into 2 broad headings: Automatic image gathering and based on processor's image gathering. The former uses the special-purpose image gathering chip, completes the image automatically gathering, the frame memory address production as well as image data refurbishing; Besides must carry on the hypothesis to the gathering pattern, the main processor does not participate in the gathering process. This method's characteristic is gathering does not take CPU when asked that timeliness is good, ... -
Based on TMS320LF2407 frequency conversion engineering research
Sunday, October 4th, 2009 at 10:17 | No commentsCategories: DSPShort Content: Sees the AC/DC/AC frequency changer, is carries on the frequency conversion, the live pressure adjustment to the output unit, moreover in many kinds of inversion control technology, applies the most widespread one kind of inversion control technology is the sine pulse-duration modulation (SPWM) technology. In the frequency conversion velocity modulation system, realizes the numerical control using DSP as the control chip, it both enhanced the system reliability, and causes system's control precision to be high, timeliness is strong, the hardware ... -
One kind of pressure-rise PFM controls DC/DC the switch
Sunday, October 4th, 2009 at 01:24 | No commentsCategories: DSPShort Content: Introduction Each kind by battery power supply's electronic products, like the portable computer, the handset, the digital camera, PDA and so on power source management system management system needs the DC/DC switch, therefore, the DC/Dc switch's application is getting more and more widespread. Its realization and the control mode are also many and varied, but the output precision, the transfer efficiency, the trigger voltage and so on are in the DC/DC switch's core questions. This article introduced a section of ... -
Based on embedded component AT89C51SNDlC electronic treatment meter design
Wednesday, May 27th, 2009 at 03:05 | No commentsCategories: SCMShort Content: 1 introduction At present uses two electricity pole piece symmetrical cover treatment human body spot the electronic treatment meter, has the function through the electrode piece on pulsating voltage and the treatment human body spot resistance, produces the human body in the treatment spot to be able the sensation pulsating current, the stimulation nerve muscle, causes its contraction and the diastole, has the movement effect, serves the treatment purpose. But in the present market this type treatment meter produces pulsating ... -
One kind based on DDS peak-to-peak value adjustable signal generating device design
Wednesday, May 27th, 2009 at 01:05 | No commentsCategories: SCMShort Content: l introduction Supply oscillator generator widespread application teaching experiment and scientific research project. Direct digital frequency synthesis technology (DDS) has the frequency resolution to be high, the cut speed is quick, the output signal phase, may output the random profile signal continuously, to be able to realize merits and so on entire digital automation control, causes its to become system supply oscillator and so on radar, correspondence, engineering design first choices. In domains and so on wide frequency and frequency-hopping ... -
Based on AVR monolithic integrated circuit Megal6 electronic clock design
Tuesday, May 26th, 2009 at 23:59 | No commentsCategories: SCMShort Content: 1 introduction Several 7 clocks can long-term, continual, reliable, work stably; Simultaneously also has the volume to be small, the power loss low status characteristic, is advantageous carries, easy to operate. The digital clock is uses the digital circuit realizes rightly ", divides, the second" the digital demonstration timing unit, widely applies in individual family, the station, the wharf, the office and so on public place, has become in the people daily life the essential essential item. As a result ... -
Manages IC using the power source to deal with the portable design the power loss challenge
Monday, April 27th, 2009 at 08:00 | No commentsCategories: Power SupplyShort Content: Although handset designers unceasingly pronunciation, camera, GPS and other function integration, in does not surpass in half inch thick outer covering, portable media player designer micro conformity and so on controller, hard drive and tone circuit in pocket size seal, but designed integrated many kinds of functions the pressures to be still huge portable. The past during several years, the power semiconductor manufacturer promoted the massive power sources to manage IC(PMIC), used in the portable expense electron system's ... -
The high efficiency bit - 48V inserts hotly pulls out the controller design
Saturday, April 25th, 2009 at 06:00 | No commentsCategories: Power SupplyShort Content: Many large-scale telecommunications and the data communication systems use insert on common back board many circuit wafers or the bit construct to the rack. The back board as well as between them the correspondence provides the power source for the bit (e.g. - 48V, 12V). Because the back board power source is at the opening condition throughout, therefore is called "hot" or "is moving" the back board. The bit must insert the rack, but cannot affect on the ... -
Based on micro controller MSC1210 CSR power source control system design
Tuesday, April 21st, 2009 at 11:59 | No commentsCategories: Power SupplyShort Content: Abstract: MSC1210 is 24 δ-σa/d transformation 51 compatible monolithic integrated circuits which American TI Corporation produces. The article introduced the MSC1210 unique feature and the principle of work, and have given in the CSR power source control system's hardware circuit and the software routine. Key word: MSC1210; Modulus switch; Power source; Control system Introduction The MSC1210 US Texas Instruments Company (TI) produces the Gaoji becomes the composite signal processing component. It integrated an enlargement mode 8051 essence, 8 group 24 high ... -
Digit panel TV’s power source design technique request analysis
Saturday, April 18th, 2009 at 04:00 | No commentsCategories: Power SupplyShort Content: The digit panel TV sustained growth, hopes in 2008 to obtain in the global television market surpasses 50% shares. Panel TV (including plasma television and liquid crystal) the power source design challenge and the traditional cathoderay tube (CRT) television has is very greatly different. The most important challenge causes the power source coordination panel TV filament thin kneading board shape, next is manages video channel's giving off heat with the electromagnetic interference (EMI) question. Compares with the CRT request, the ...
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