RE3209 320X90X311 Aluminum enclosure

RE3209 320X90X311 Aluminum enclosure
http://www.siliconray.com/re3209-320x90x311-aluminum-enclosure.html

Outside Dimension:   W x H x L = 320mm x 90mm x 311mm(13''x4''x13'')
Inside Dimension:      W x H x L = 220mm x 85mm x 300mm(9''x3.5''x12'')
Material:                      Aluminum
Front Thickness:          8mmBack Thickness:          3mm
Finish:                         Brushed, hard anodized
Net Weight:                 5.2kg

TDA7297-Mini 15Wx2 Audio Amplifier Board

TDA7297-Mini 15Wx2 Audio Amplifier BoardA mini 15Wx2 board designed with TDA7297
Features- Designed with TDA7297
http://www.siliconray.com/tda7297-mini-15wx2-audio-amplifier-board.html
- Very small size
- Single 12V power supply
- 15W x 2 max output power

DSP development board function

DSP development board function
http://www.siliconray.com/development-boards/ti-dsp/bp5509-02-tms320vc5509-development-board.html
DSP development board, is the function of the research and development on DSP, used in the development of digital signal processor (DSP) launch circuit board, and provide the principle diagram and the source code to the customer. DSP especially in TI company's DSP market share is the largest, have very widely customer base. In the DSP development board, Beijing road and vertical and horizontal technology Co., LTD. (the house of development board) introduced a Easy series DSP development board, including Easy2812
http://development-board.blogspot.com/2012/02/how-to-buy-scm-development-board.htmldevelopment board, Easy5509 development board, especially suitable for the students to learn to use. Also introduced QQ series development board, including QQ2812 development board, QQ5509 development board, suitable for company researchers use. Consumer demand auxiliary driving system with advanced technology need precision functions and the size and shape of very small high reliability components. Because these system size is small, and is very close to each other, so also requires ?

DSP development board profile

DSP development board profile
http://www.siliconray.com/development-boards/ti-dsp.html
Development board, is aimed at a chip to the chip as the core, the function of the chip will have extended out, will every part of the function through procedure demonstrate out. At the same time, provide the source program and the principle diagram, so that customers can with the minimum price, the fastest speed to learn the use of the chip, to twice the result with half the effort. DSP, is a digital signal processor. Usually used for data processing algorithm, compared with other processor, its strong data processing power and speed, assembly line structure is its biggest characteristic.

DSP development board

DSP development board
http://development-board.blogspot.com/2012/02/how-to-quick-and-good-learning-arm-have.html
DSP similar filter kinds of experimental is in matlab simulation can, do not need to buy what the development board, if is the image processing of? Need not to need to buy development board
If just algorithm, not dealing with external interface with matlab simulation
If need acquisition or output, had better be in development board
BoHang embedded development board has various kinds of DSP development board

The power modules output current choice

The power modules output current choice
http://www.siliconray.com/tube-6n8p-mosfet-hybrid-hifi-audio-amplifier.html
Because of switch power supply, high working efficiency, and generally can achieve 80% above, therefore, in its output current choice, should be measured accurately or calculation of maximum absorption current electric equipment, in order to make the switch power supply Is adopted with high ratio of performance to price, usually output computation formula Is: Is = KIf type: Is--of switch power supply output current ratings; If-electrical equipment maximum absorption current; K-allowance coefficient, generally take 1.5 ~ 1.8;
Edit this paragraph 3.3 protection circuit
Switching power supply for design must be with the flow, heat, short circuit protection function etc, so in the design should be preferred protection function complete switch power supply module, and the protection circuit technology parameters should be and electrical equipment work characteristics match, in order to avoid damage or electrical equipment

Dc chopper

Dc chopper
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DC/DC transform is variable DC voltage transform to a fixed DC voltage, also known as DC chopper. The chopper sensor means has two, one is the pulse width modulation way Ts unchanged, change ton (general), 2 it is frequency modulation (1) Buck circuit--the chopper Buck, the output voltage U0 less than average input voltage Ui, the same polarity. (2) Boost circuit--the booster chopped, and its output voltage is greater than the average U0 input voltage Ui, the same polarity. (3) Buck-Boost circuit--step-down or Boost the chopper device, the output voltage U0 or greater than the average less than the input voltage Ui, the reverse polarity, inductance transmission. (4) Cuk circuit--or the chopper boost blood pressure, the average electricity output
The greater or less than the pressure U0 input voltage Ui, the reverse polarity, capacitance transmission. And Sepic, Zeta circuit. The above for the isolation type DC-DC converter circuit, the isolation type DC-DC converter is shock circuit, a flyback circuit, half bridge circuit, the whole bridge circuit, mosfet circuits. Today's soft switch technology makes DC/DC happen a qualitative leap, the United States VICOR company designs the manufacture various ECI soft switch DC/DC converter, and its maximum output power 300 W, 600 W, 800 W, etc, the corresponding power density for (6.2, 10, 17) W/cm3, efficiency as the (80 ~ 90) %. Japan TDK-Lambda company launched a new soft switch technology using high frequency switching power supply module RM series, the switch frequency for (200 ~ 300) kHz, power density has reached W/cm3 27, the synchronous rectifier (MOSFET instead of the schottky diodes), make the whole circuit ? efficiency

Power supply module

Power supply module
http://www.siliconray.com/500w-12v-to-45v-car-audio-power-supply-module.html
Generally speaking, this class module called load point (POL) power supply system or using a power supply system (PUPS). Because of the advantages of modular structure very much, therefore module power is widely used in the exchange equipment, access devices, mobile communications, microwave communication and optical transmission, routers and other communications field and automobile electronics, aerospace and other. Especially in recent years due to the rapid development of data services and the further promotion of distributed power supply system, module power supply growth is more than a power supply. Along with the semiconductor technology, encapsulation technology and high frequency the wide use of soft switch, module power supply power density is more and more big, the conversion efficiency more and more high, application is also more and more simple.
People in the switch power technology is the development of related edge of power electronics device, the side development
Love pu electronic power supply module (4 zhang) switch frequency conversion technology, both to promote each other push switch power for more than a year two digital growth toward light, small, thin, low noise and high reliability, anti-interference direction. Switching power supply can be divided into the AC/DC and DC/DC two kinds big, DC/DC converter is now realize modular, and design technology and production process at home and abroad are mature and standardization, and has set up a file users receive the recognition, but the AC/DC modular, because of its own characteristics in the process of makes modular, meet more complex technology and process manufacturing. The following are two kinds of switch power supply structure and characteristics in this paper

DSP system design process

DSP system design process
http://www.siliconray.com/bp28335-01-tms320f28335-development-board.html

In the design of DSP system before, must first according to the goal of application system to determine the system performance index, signal processing requirements, normally available data flow chart, mathematical operation sequence, formal symbol or natural language to describe. The second step is to according to the requirements of the system for the simulation of a high-level language. Generally speaking, in order to achieve the ultimate goal of the system, the need to input signal for proper treatment, and the different processing methods will result in different system performance, and to get the best system performance, in this step must be sure the best treatment methods, namely the digital signal processing algorithm (Algo rithm), so this step also called algorithm simulation stage. For example, voice compression algorithm is to determine the compression ratio condition, won best ?
After completion of the second step in, then can design real-time DSP system, the design of the real-time DSP system including the hardware design and software design two aspects. Hardware design according to the first system of the size of the computation of operation, the accuracy requirement of the system cost, restrictions, and volume, power requirements to choose the appropriate DSP chip. Then DSP chip design the periphery of the circuit and other circuit. The software design and programming mainly based on the system requirements and selected digital signal processor (DSP) write corresponding DSP assembler, if the system is not a high-level language and quantity of compiler support, also can use advanced language (such as C) programming. Due to the existing advanced language compiler efficiency than manual writing assembly language efficiency, therefore in the actual application system often use advanced language and ?
System software and hardware debugging respectively after completion, can the software from development system and direct application system in operation. Of course, DSP system development, especially the software development is a need to the repeated process, even though through the algorithm simulation basically can know real-time system performance, but in fact the simulated environment can not do it and real-time system environment is the same, and will be transplanted into real-time simulation algorithms system must be considered whether to real-time operation of the algorithm. If the computational complexity is too big can't in hardware running in real time, must be redone or simplified algorithm.

DSP advantages and disadvantages

DSP advantages and disadvantages
http://www.siliconray.com/bp5509-02-tms320vc5509-development-board.html
DSP advantages
The components of the tolerance values not sensitive, by temperature, environment and other external factors affecting small; Easy to realize the integration; VLSI can timeshare reuse, sharing processors; To adjust the coefficients of the processor realize adaptive filter; Can simulate the processing can't function of the realization of the: linear phase, sampling rate processing, cascade, easy to store, etc.; Can be used for very low frequency of the signal.
DSP faults
Need modulus transformation; By sampling frequency the limit, processing frequency range is limited; Digital system of power consumption by active components, no passive equipment and reliable. But the advantages than shortcomings.

DSP microprocessor

DSP microprocessor
http://www.siliconray.com/development-boards/ti-dsp.html
DSP (digital signal processor) is a unique microprocessor, is a digital signal to deal with a large quantity of information devices. Its working principle is to receive analog signals, converted to 0 or 1 digital signal. Again to digital signal modify or delete, strengthening, and in other systems of digital data interpretation the chip to simulate data or the actual environment format. It is not only a programmable sex, and in fact slide may run at speeds of up to ten million instructions per second article of complex procedures, far more than general microprocessors, digital electronic world is increasingly important computer chips. Its powerful data processing ability and high speed, is the most admirable two characteristics. DSP microprocessor (chip) generally has the following characteristics: (1) in an instruction cycle ?