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Based on TMS320LF2407 brain electrical signal processing system design
Sunday, May 31st, 2009 at 00:03 | No commentsCategories: DSPShort Content: Abstract: The present paper introduced the brain electrical signal processing system design's two essential methods and the good and bad points, have analyzed the DSP particularly TMS320LF2407 main feature, elaborated realizes the method based on the TMS320LF2407DSP 16 channel brain electrical signal processing system's hardware and the software. This system hardware structure simple reliable, flexible, may provide the function formidable hardware foundation for the brain wave digital signal processing software; This system's software has used the TMS320LF2407 internal 16 channel's ... -
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 ... -
Switch DC-DC switch’s EMI plan - 51RD Chinese electronic net
Friday, April 24th, 2009 at 10:00 | No commentsCategories: Power SupplyShort Content: Possibly produces the unwanted signal in the DC-DC switch's high frequency high efficiency switch. Inputs on power line's conduction noise to be possible to miss the mold or the syntype noise current forms appears. Is mainly the low frequency bad mold noise, in the base frequency turn-on frequency harmonious wave frequency presents in the input inductance. The syntype noise mainly has the high frequency component, gauges between the shift input inductor and the place, similarly, contains some kind of noise ... -
Uses in the active electric power filter’s IGBT actuation and the protection research
Wednesday, April 8th, 2009 at 05:09 | No commentsCategories: Power SupplyShort Content: Abstract: Introduced that in the active electric power filter design EXB84l the insulation grid field effect transistor (IGBT) driver's actuation principle and the electric circuit characteristic, to the IGBT electronics grid drive performance, the electronics grid series resistance have carried on the discussion, gives the overflow protection and has pressed the absorption the effective means. The prototype tries to move proved that this kind of design proposal is reliable, is effective.Key word: Active electric power filter; IGBT; EXB84l; Actuation protection ... -
One kind uses in the space engineering the secondary power system design
Tuesday, March 17th, 2009 at 20:26 | No commentsCategories: Power SupplyShort Content: Introduction The dispersion-like secondary power systems are opposite in the centralism power supply say, the spacecraft system uses the dispersion power supply mostly the design structure, may from the sole 28V main line for the spacecraft various subsystems power supply, but does not need to carry on the redundant wiring for each kind of voltage penetration overall system. Along with the CMOS component's popularization, many print circuit wafers need specification and so on 5V and 12V or 24V ... -
High performance ship-borne drafting machine multi-output voltage-stabilized source design
Sunday, February 1st, 2009 at 21:53 | No commentsCategories: Power SupplyShort Content: High performance ship-borne drafting machine request in strong electromagnetic interference (EMI) under the environment can the normal work, for this reason, drafting machine's each system and the subsystem its performance index must satisfy the country related ship-borne electronic installation's standard. In order to satisfy its performance requirement, this article in the general voltage-stabilized source design's foundation, mainly from forms the electromagnetic interference 3 essential factors, namely the noise source, the dissemination way and begins the interferometric technique, to introduce ... -
Establishes the precise direct-current fluctuation current supply
Friday, December 26th, 2008 at 22:45 | No commentsCategories: Power SupplyTags: FilterShort Content: Although the active filter's theoretician and the designers (general impedance transformer) are familiar to GIC, but simulates the personnel not to understand generally to it. A single port active circuit includes the low cost to transport generally puts, the resistance and the electric capacity, GIC transforms the capacitance into the induction reactance, thus may substitute in the filter by the RLC transmission function description inductance. Moreover, the GIC input impedance equation's flexible permission carries on the hypothesized impedance the ... -
Forms the list to output filter’s PC to dispose RLC the resonator
Sunday, December 7th, 2008 at 09:09 | No commentsCategories: Power SupplyTags: FilterShort Content: This issue " the design example " the column introduced one kind of low power loss instrument uses the general filter circuit, you may use the parallel port to carry on the programming through PC to it. This kind of filter circuit does not need the digital potentiometer to use the analog switch and the latch carries on the numerical control (Figure 1 and Figure 2). So long as moves the simple software code on PC, you may dispose one ... -
Uses DSP, PLD and ASIC realizes multispeed filter design comparison - 51RD the Chinese electronic net
Friday, November 28th, 2008 at 23:55 | No commentsCategories: EDA/PLDShort Content: Many communications systems must use the multispeed filter (multirate filter), the multispeed filter are refer to the output data speed and the data-in speed not equal filter, commonly used Yu physical interface like d/a converter (DAC) or modulus switch (ADC) connection place. When filter output data to DAC, user regular session choice interpolation filter, because it can produce more sampling points to cause DAC the output wave shape to be smoother; But when filter from ADC received signal, the user ... -
Based on FPGA IIR digital filter hardware module design
Sunday, November 16th, 2008 at 22:12 | No commentsCategories: EDA/PLDShort Content: Abstract: According to the design requirements, uses in the Matlab signal processing toolbox's filter, may design very conveniently meets the application requirement not after the quantification IIR filter, and further uses the VHDL language to describe, after translation, function simulation, synthesis and succession simulation might realize on FPGA. This design extension is good, in actual use, but revises the periphery parameter to change filter's frequency response suitably, performs according to the different request on different scale's FPGA to realize. ...
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