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

Tuesday, April 21st, 2009 at 06:59 | No comments

Categories: Power Supply

Tags: 3G, Processor, The power source manages the

Short Content: Abstract: This article introduced with an example TWL3024 in the 3G mobile termination's power source management games, this kind of management games regarding grasps equipment's energy conservation to fall generally consumes also has certain reference function.Key word: TWL3024; 3G; Power source managementForewordthe 3G terminal power source manages (because one of main strategies, is designs the transfer efficiency high linear pressure regulator its low pressure drop characteristic to be called LDO). Although the switch pressure regulator's transfer efficiency is high, but ...

Saturday, November 22nd, 2008 at 13:12 | No comments

Categories: Communication Networks

Tags: 3G, ARM, DSP, FPGA, signal processor

Short Content:     Along with digital technique's progress, high speed, the ultra large scale integrated circuit widely uses, the 3G mobile termination baseband signal processing system toward nimble, integrated, modular, the universalized direction is developing highly. The baseband signal processor is the product which the digital technique and the communication unify, it can process the digital baseband signal nimbly, the modulation wireless signal in order to realize with the communication network system front end the base depot wireless communication. The article has ...

Monday, November 17th, 2008 at 17:39 | No comments

Categories: Communication Networks

Tags: 3G, AGC, FPGA

Short Content: 1 introduction 　　The majority receivers must process the dynamirange very big signal, this need makes the gain control, produces by the overload protection or some level intermodulations, adjusts demodulator's work to optimize the work. In modern radio reception installment. The variable gain amplifier is electrically controlled, when and in the receiver uses the attentuator, they usually are the continual attentuators which controls by the variable voltage. The control should be smooth, and input signal energy usual doubling number relations ...

Wednesday, October 29th, 2008 at 08:03 | No comments

Categories: Communication Networks

Tags: 3G, mobile communication, upending station

Short Content:     Regarding the third generation mobile communication system, various countries proposed many kinds of different standards, must unify these standards are very difficult, the IMT-2000 development strategy already changed the past "the unification" the concept, transfers, but works out the quite realistic transition plan take the various local existing second generation of system network as the foundation, proposed "the IMT-2000 family" concept. It gave up in the space connector, the networking and so on aspect uniform endeavors, but devotes to ...