51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Monday, May 4th, 2009 at 19:07 | No comments

Categories: Power Supply

Tags: electrostatic discharge, small, Voltage

Short Content: This design example introduced how in short voltage insufficient period causes the telecommunication equipment maintains the normal work. Must first understand telecommunication equipment special-purpose power source's several details. To telecommunication equipment feed power source's syntype voltage for - 48V, although the actual voltage range possibly is - 42.5V ~ -56V, - 40V ~ -60V, even surpasses these scopes. Public power source - - "brick bat" DC/DC switch work in - 36V ~ -75V scope. When - the 48V source drops ...

Friday, December 26th, 2008 at 12:45 | No comments

Categories: Power Supply

Tags: Voltage

Short Content: 　　The output voltage is opposite in the voltage reference short-term change is a noise. The reference voltage noise occurs generally in the following two frequency bands: Short-term noise in 0.1Hz~10Hz, broadband noise in 10Hz~1kHz. Because the noise voltage is proportional generally with the reference voltage, the same as ever expresses the noise with every hundred (ppm) extremely, and causes every 1/1000000 values to be constant. Can the crack (or band gap) the voltage reference has is situated between 3ppm~16ppm the ...

Saturday, September 6th, 2008 at 09:35 | No comments

Categories: DSP

Tags: C language, DSP, invertor, PWM, TMS320F240, Voltage

Short Content: Abstract: The energy back coupling system to slows down our country energy supply and demand to have the vital role contradictory, but inverts the technology to hold the important position in the energy back coupling system, mainly introduced one kind of voltage incorporation invertor. First has carried on the system analysis to the voltage invertor, has given the single-phase voltage and the three-phase voltage two kinds incorporates invertor's ideal electric circuit model. Based on this, has designed one based on ...