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

Tuesday, December 9th, 2008 at 01:09 | No comments

Categories: Power Supply

Tags: frequency conversion

Short Content:     Abstract: The frequency changer is in industrial automation system's basic dragging equipment. When using the environment very severe, does not suit in the human carries on the control directly to the frequency changer needs to carry on the remote control when the scene to the frequency changer. Mainly introduced how to use VC to compile the control software to carry on the networking control to the frequency changer.     Key word: Frequency changer; Control software; Networking control Introduction The ...

Tuesday, November 18th, 2008 at 09:12 | No comments

Categories: Power Supply

Tags: frequency conversion

Short Content: 1 MRFIC1505 synopsis Under MRFIC1505 1.575 GHz GPS the frequency changer suitable to use in the GPS receiver, its internal integration has LNA (low noise amplifier), the mixer, VCO, PLL, the crystal oscillator, a/D switch and the return route filter. Its RF input frequency is the 1575.42MHz, IF output frequency is 4.1MHz, has the 105dB model translation gain, uses 2.7V the working voltage; the 28mA typical current consumption, uses the LQFP-48 seal. MRFIC1505 available in equipment and so on mobile ...

Wednesday, October 15th, 2008 at 21:54 | No comments

Categories: Power Supply

Tags: frequency conversion

Short Content:     Abstract: Has carried on the analysis comparison to several kind of common mesohigh frequency changers, to different circuit structure's mesohigh targets and so on frequency changer's reliability, redundancy design, harmonic content and du/dt has carried on the thorough discussion, and proposed some views to the mesohigh frequency changer's shaping principle.     Key word: Hands over - hands over the frequency changer; Load commutator type frequency changer; Current supply frequency changer; Potential source frequency changer 1 outline At present, in ...

Wednesday, October 15th, 2008 at 11:54 | No comments

Categories: Power Supply

Tags: frequency conversion

Short Content: Introduction Along with the people living standard's unceasing enhancement, electrical appliances' is getting higher and higher in life popular rate, at the same time, the people are also getting higher and higher to electrical appliances' request. The refrigerator cannot only be freezes, the washer cannot only be washes clothes, but the air conditioning cannot satisfy merely the refrigeration, the system is hot, but must conserve energy, is fastidious about the efficiency. In order to satisfy the people to electrical appliances' ...

Sunday, September 7th, 2008 at 17:28 | No comments

Categories: SCM

Tags: Air conditioning, frequency conversion

Short Content: 1    Introduction        Because along with our country national economy's development and the people's material culture living standard's unceasing enhancement, the air-conditioner has widely applied in society's each kind of situation, the direct-current frequency conversion air-conditioner has the energy conservation, lowly chirp, the constant temperature control, all-weather revolution, the start low-frequency compensation, to achieve performance fast and so on hypothesis temperature, makes air conditioning's comfortableness to enhance greatly, will receive people's affection more and more. The monolithic integrated circuit technology's widespread ...