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Realizes based on 51 monolithic integrated circuit double pole PWM software_51 microcontroller, PWM ,
Thursday, December 10th, 2009 at 06:35 | No commentsCategories: Embedded systemTags: 51 microcontroller, PWMShort Content: Keil C is based on the standard C essence third party language, uses it to be possible to realize highly effective very conveniently to the C51 series monolithic integrated circuit's high-level programming. C51 is uses the most universal 8 monolithic integrated circuits at present, the low in price. It with the software programming union, may satisfy the numerous function requests quite conveniently, even substitutes for some complex hardware circuit, simplifies the hardware design, and enhances system's reliability and ... -
89C52 PWM output routine_PWM, 89C52
Monday, November 23rd, 2009 at 11:41 | No commentsCategories: Embedded systemShort Content: #include -
51 monolithic integrated circuits output PWM two method_51 microcontroller, PWM
Thursday, November 12th, 2009 at 01:29 | No commentsCategories: Embedded systemTags: 51 microcontroller, PWMShort Content: 51 series monolithic integrated circuit non-PWM output function, may use the timer to coordinate software's method output. To the accuracy requirement not high situation, is practical. The circuit diagram sees Figure one, used the high speed light to separate (6N137) to output, and PWM signal but actually. First, schematic diagramomit image. Figure one Second, fixed pulse width PWM outputCompletes the PWM output with the T0 timer, the pulse width is fixed: 65536 subtle. The T0 timer establishes: 16 timersPWM:omit image. Procedure ... -
Uses PWM to obtain the precise output voltage_microcontroller, PWM
Wednesday, October 21st, 2009 at 00:14 | No commentsCategories: Embedded systemTags: microcontroller, PWMShort Content: In recent years, many monolithic integrated circuit Manufacturer, like Atmel, Analog Divices, Intel, Philips, Dallas, Maxim and so on, has promoted the new high speed monolithic integrated circuits in abundance. Their instruction execute cycle is only original 1/3~1/several, and integrated EEPROM, WDT, a/D switch and the D/A switch in the monolithic integrated circuit, enhanced monolithic integrated circuit's performance greatly, has facilitated the user. However, in many monolithic integrated circuit's D/A switch's output has used the pulse-duration modulation (PWM) form. ... -
One kind the advanced version accent which controls by the STC12C2052AD monolithic integrated circuit presses the electric circuit
Tuesday, May 26th, 2009 at 14:52 | No commentsCategories: SCMShort Content: 0 introductions In the ZXC10 correspondence electrical power system, the superior machine output's PWM modulation signal's frequency is 1 kHz, moreover the system requests the power source to be able to carry on according to the PWM signal dutyfactor adjusts the pressure. Namely scope carries on the linear adjustment to the power source output voltage in 40 Vdc~60 in the Vdc through this PWM signal. PWM signal 5% dutyfactor correspondence 40±0.5 Vdc,95% dutyfactor correspondence 60±0.5 Vdc. Before this function is ... -
New CPU and microprocessor low pressure big electric current programmable output power source design - 51RD Chinese electronic net
Monday, April 13th, 2009 at 05:42 | No commentsCategories: Power SupplyShort Content: Abstract: In order to solve the CPU electric power supply system request output precision to be high, the voltage lowers the output current to be big and so on characteristics, gave has used flies trillion semiconductor company's synchronized PWM the control chip design low pressure big electric current CPU main electric power supply electric circuit's method. Because this electrical power system simultaneously has the output voltage programmable function, can thus satisfy CPU and the high performance microprocessor system power source ... -
Instead stirs up-like the switching power supply design based on TOPSwitch and the PI Expert single end
Sunday, April 12th, 2009 at 19:42 | No commentsCategories: Power SupplyShort Content: Abstract: TOPSwitch the monolithic switching power supply chip collection PWM controller and high-pressured MOSFET in a body, the performance are outstanding, the reliability is high. With it necessary PI the Expert software, the function is formidable, the use is simple, uses for to design the switching power supply to be possible to reduce the cost, the reduction cycle, raises the efficiency. Designed one kind of single end using TOPSwilch and PI Expert instead to stir up-like the multi-channel power take-off ... -
Uses the fixed breakover timer to optimize switching power supply underloading energy efficiency - 51RD the Chinese electronic net
Tuesday, April 7th, 2009 at 19:08 | No commentsCategories: Power SupplyShort Content: Because has the high efficiency and the high power density, switching power supply's is getting more and more popular in modern electron system use. Specially along with the control chip's application, switching power supply's circuit design obtained the enormous simplification, often only needs in the pulse-duration modulation (PWM) control chip foundation to add some periphery component then to compose the switching power supply again, this even more promoted switching power supply's design and the development. Looking from the type, the ... -
Based on AD8205 high-end electric current sensor’s PWM electric current controller
Sunday, April 5th, 2009 at 12:08 | No commentsCategories: Power SupplyShort Content: Abstract: The high accuracy big electric current controller has the widespread application, but output current's examination electric circuit is quite complex in the high syntype voltage situation. The AD8205 high-end electric current sensor may simplify the examination electric circuit, uses AD8205 and UC3842 the current mode PWM control circuit realizes the PWM adjustable current supply, the circuit structure simple reliable, the output current precision is high.Key word: High-end electric current sensor; Pulse-duration modulation; Adjustable current supply; Syntype voltage 1 introduction ... -
Based on MOSFET control PWM direct-current adjustable power source’s development
Wednesday, April 1st, 2009 at 13:08 | No commentsCategories: Power SupplyShort Content: Picking Wanting: Because the instrument uses power source's volume and the weight usually is restricted, for this reason proposed that one kind controls by MOSFET, and isolates by the high-frequency transformer switching power supply design method. This power source has the volume to be small, the weight is light, resistance to interference, the output voltage is stable, the accent presses the scope to be broad, the voltage dynamic response is quick, the performance-to-price ratio is high, characteristics and so on ...
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