2012年4月22日星期日
2012年2月15日星期三
RE2205 aluminum shell special offer
RE2205 aluminum shell special offer
http://www.siliconray.com/re2205-220x52x226-aluminum-enclosure-1.html
Description
RE2205 is an top quality aluminum enclosure. It can be used as enclosure of DAC, solid state or tube headphone amplifiers and preamplifiers.
Features
Outside Dimension: W x H x L = 220mm x 52mm x 226mm(9''x3''x9'')
Inside Dimension: W x H x L = 200mm x 48mm x 217mm(8''x2''x8.5'')
Material: Aluminum
Front Thickness: 6mm
Back Thickness: 2mm
Top Thickness: 2mm
Bottom Thickness: 2mm
Side Thickness: 4mm (special shape)
Finish: Brushed, hard anodized
Net Weight: 1.2kg
RE2205 is an top quality aluminum enclosure. It can be used as enclosure of DAC, solid state or tube headphone amplifiers and preamplifiers.
Features
Outside Dimension: W x H x L = 220mm x 52mm x 226mm(9''x3''x9'')
Inside Dimension: W x H x L = 200mm x 48mm x 217mm(8''x2''x8.5'')
Material: Aluminum
Front Thickness: 6mm
Back Thickness: 2mm
Top Thickness: 2mm
Bottom Thickness: 2mm
Side Thickness: 4mm (special shape)
Finish: Brushed, hard anodized
Net Weight: 1.2kg
What is a bluetooth module
What is a bluetooth module
DB9 Interface Serial Port Bluetooth Module
Bluetooth module is refers to the integrated bluetooth chip, used for wireless communication network.
In the picture above, have USB interface bluetooth module is USB bluetooth card. Used for wireless Internet access.
BLUETOOTH wireless (BLUETOOTH), is 1998 roll out a new wireless transmission way, is actually replace data cable short-range wireless communication technology, through the low bandwidth waves realize point-to-point, or point-to-multipoint connections between the information exchange. This network model is also called private space network (PAN, PersonalAreaNetwork), is more micro network or delicate bluetooth the main controller/adnexal build mini web based, every small network of eight active device and 255 accessory device structure, and more micro network connection up and formed the expanding nets, and convenient, fast to realize the ?
DDS technology introduction
DDS technology introduction
Brief
Description
This DDS board is designed with AD9833 from analog device. It can output sine wave, trianble wave and retangular wave. The resolution is 28bit. Max frequency is up to 12.5MHz.
Features- Small size
- Designed with AD9833
- On board 25Hz oscillator
- Max output frequencyy is up to 12.5MHz
- On board SMA connector for output
- 2.5-5.5V power supply
DDS is A full digital frequency synthesizer, by phase accumulators, waveform ROM, D/A converter and low pass filter composition. The clock frequency after A given, the output depends on the frequency of the signal frequency control word, the frequency resolution depends on accumulators digits, phase resolution depends on the ROM address line digits, amplitude quantization noise depends on the ROM data A word length and D/A converter digits.
DDS have the following advantages: (1) the frequency resolution is high, the output frequency much, can reach a frequency (N for phase accumulators digits); (2) the frequency switching speed, can reach us magnitude; (3) when switching frequency phase continuous; (4) can output the broadband orthogonal signal; A headscarf output phase noise is low, the source of reference frequency phase noise improved; [6] can produce any waveform; [full digital reality
This DDS board is designed with AD9833 from analog device. It can output sine wave, trianble wave and retangular wave. The resolution is 28bit. Max frequency is up to 12.5MHz.
Features- Small size
- Designed with AD9833
- On board 25Hz oscillator
- Max output frequencyy is up to 12.5MHz
- On board SMA connector for output
- 2.5-5.5V power supply
DDS is A full digital frequency synthesizer, by phase accumulators, waveform ROM, D/A converter and low pass filter composition. The clock frequency after A given, the output depends on the frequency of the signal frequency control word, the frequency resolution depends on accumulators digits, phase resolution depends on the ROM address line digits, amplitude quantization noise depends on the ROM data A word length and D/A converter digits.
DDS have the following advantages: (1) the frequency resolution is high, the output frequency much, can reach a frequency (N for phase accumulators digits); (2) the frequency switching speed, can reach us magnitude; (3) when switching frequency phase continuous; (4) can output the broadband orthogonal signal; A headscarf output phase noise is low, the source of reference frequency phase noise improved; [6] can produce any waveform; [full digital reality
2012年2月13日星期一
MOSFET (MOSFET) master come in, you absolutely understand
Mosfet absolutely know new brand IPS ~ ~ ~
You know IPS and IR AUK XianTong these international brand of disadvantages compared?
Write a brief SWOT line, probably know what...
Hope to have superior to the point of help,
From the application of the structure, because MOSFET in portable products, LCD TV and the wide application of consumer electronics, make consumer electronics is the biggest application MOSFET market; And with the application of the motherboard, computer business in time, industry control is the third major applications. Sadie consultants predict, future Netbook and by fortress of notebook computers drive, the motherboard will still be China MOSFET the main driving force of rapid development market.
By the influence of the financial crisis, the Chinese mobile phone output growth rates in 2008 appear to drop considerably, 2009 will be even negative growth, because in a cell phone with MOSFET mainly in the mobile phone charging protection, mobile phone output growth slowed speed in the impact on the field for the needs of the MOSFET. From market demand ?
Mosfet usage
Mosfet three pins G, D, S meaning. Three pins all respectively by the circuit what position (also can say connect that kind of line, for example, to take the high level, low level, grounding, etc.). Can control switch circuit maximum voltage is how much, 220 v voltage can directly access switch ends? How much is the input voltage mosfet
If someone help me below graph of the mosfet connect well I'll an additional 100 points, said to do it. (the above question answer correctly can also score
One answer:
1. G grid D leak extremely S to source the figure on the inside of the pipe is N the channel of the MOS, working principle: as long as the voltage on G than S voltages in the big 5-6 V, MOS tube began to conduction, current flow from S D.
2. G meet high and low level (exactly say the driving voltage), D take power supply (high potential), S took the load or low potential.
3. Can control switch circuit maximum voltage is the voltage MOSFET depends on how much the highest value, compression value have how old, can control much of the voltage circuit.
4.220 V may not directly in both ends meet switch.
5. The input voltage MOSFET from the picture not to come out now, no way to tell you, but from the picture to see, not like 220 V, should be low pressure.
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