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Based on monolithic integrated circuit CPLD multi-channel precise timing control system design
Wednesday, May 27th, 2009 at 04:12 | No commentsCategories: SCMShort Content: 1 introduction In the modern control system the controlled member possibly is complex, scattered, moreover often is parallel, the independent working, but in the whole they are the incident cross-correlation organic combinations. Therefore, control signal's sequential logic requests to be more precise. The CPLD monolithic integrated circuit has provided the technical support for the control system, is composed the multi-computer system by CPLD and the monolithic integrated circuit to have the logical control to be convenient, the succession is precise, ... -
Based on I2C main line remote control color television principle and breakdown demonstration installment development
Wednesday, May 27th, 2009 at 03:45 | No commentsCategories: SCMShort Content: 1 introduction When television technology teaching, the electric circuit is complex, each kind of part has the breakdown phenomenon regarding the television to demonstrate with difficulty on the screen, the teacher can only depend upon the principle analysis to make the judgment, is separated from the circuitry and the material object, causes the student difficultly to study, the teacher difficult to teach common phenomenon. But when student actual operation, the signal flow is not direct-viewing, has the suitable risk. In ... -
AT89C2051 bidirectional temperature supervisory system’s design
Wednesday, May 27th, 2009 at 03:32 | No commentsCategories: SCMShort Content: 1 introduction Certain application situation needs to monitor the temperature, the request temperature maintains based on this. For example the crops hotbed grows seedlings in 20℃~30℃, domesticated fowl hatching in 37℃~40℃, mold mushroom spawn cultivation in 23℃~28℃. But the ordinary unidirectional excess temperature warning satisfies with difficulty requests, therefore, proposed that one kind controls the warm system design plan using the temperature sensor and the monolithic integrated circuit application system's bidirectional excess temperature. This system design can demonstrate the ultra ... -
Based on MN101EF32D monolithic integrated circuit’s electronic sphygmomanometer design
Tuesday, May 26th, 2009 at 21:05 | No commentsCategories: SCMShort Content: Introduction The blood pressure is the great importance the health indicators, the blood pressure survey accurate or not direct relation people's health. The country lists as the sphygmomanometer the compulsion examination measurement appliance. Generally the hospital use's mercury sphygmomanometer based on the artificial Ke sound law, this method has some inherent shortcomings: First, deflates the speed has the immediate influence to the reading, international standard deflation speed for each second 3~5mmHg, but different doctor deflates has slow quickly, will ... -
The C8051F320 train inspects safely meter’s design
Tuesday, May 26th, 2009 at 19:45 | No commentsCategories: SCMShort Content: 1 introduction Along with science's and technology's development, rides the train journey, the traveling to become one of people main transportation ways, to safeguard the train safe operation, regular or carries on to the train inspects is safely non-periodically an extremely important work, the row examines the personnel when train arrival needs to inspect safely to the train. Generally does an inspection the control system to verify the fixed coach number, the stand and the time with difficulty, therefore realizes ... -
One kind based on SoC high accuracy electron blood pressure instrumentation
Tuesday, May 26th, 2009 at 17:59 | No commentsCategories: SCMShort Content: The blood pressure is one of human body important physiology parameters, carries on the precision measuring to it, is advantageous in the early discovery and the distinction hypertension type, puts forward the reasonable treatment proposal. At present, on clinical mainly uses to the ordinary patient not creates the examination the method, it divides into the artificial Ke sound law and the oscillography two kinds approximately. Although the artificial Ke sound law is quite accurate, but the operation difficulty, is been ... -
Has the ethernet connection accumulator cell to turn into supervisory system’s design
Tuesday, May 26th, 2009 at 16:52 | No commentsCategories: SCMShort Content: 1 introduction The battery plate comes of age the skill is in the accumulator cell production process important link. So-called turns into has referred to the pole plate charging and discharging process, namely using the electrochemistry responded that causes the electrical energy to transform the chemical energy to store up. The accumulator cell turns into the charging and discharging process is under the external voltage the complex chemical reaction process, needs the supervisory system antipode plate current voltage value to ... -
With realizes - en.51rd.net based on the monolithic integrated circuit high performance-to-price ratio frequency meter’s design
Tuesday, November 25th, 2008 at 01:49 | No commentsCategories: SCMShort Content: Abstract: This system take 8051 monolithic integrated circuits as a core, and uses the LED monitor using monolithic integrated circuit's operation and the control function real-time the frequency measurement rate demonstration, both satisfies the survey the accuracy requirement, and has the very good performance price ratio. Key word: Monolithic integrated circuit synchronizing frequency survey 1 system survey principle The measuring technique uses the multi-cycles with to pace off the mensuration, has guaranteed the measuring accuracy. The multi-cyclical ... -
Enhances the low noise amplifier measuring accuracy based on the network analyzer
Thursday, November 20th, 2008 at 10:05 | No commentsCategories: Communication NetworksShort Content: Abstract: Now many units are engaged in low noise amplifier (LNA) project work, moreover requests LNA to have the low power input, sometimes the power input even is smaller than - 60dBm. In view of such LNA, if wants to survey its four S parameter accurately, will become very difficult. But establishes the network analyzer each output port's power, the intermediate band affable attentuator as well as the high accuracy calibration reasonably, may survey LNA accurately four S parameter. This ... -
51 monolithic integrated circuit border triggering interrupt response time survey
Monday, October 27th, 2008 at 16:23 | No commentsCategories: SCMTags: surveyShort Content: The MCS-5l monolithic integrated circuit series belongs to 8 monolithic integrated circuits, it is Intel Corporation after the MCS-48 series success design, promoted the product in 1980. Because the MCS-51 series has the very strong internal function and the command system, thus caused monolithic integrated circuit's application to have a leap, this series's product also very quickly became in the world the second generation of standard controller. the 5l series monolithic integrated circuit has 5 interrupt sources, including 2 ...
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