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

Tuesday, September 15th, 2009 at 16:51 | No comments

Categories: DSP

Tags: development, DSP, floating point algorithm, Phase-locked loop

Short Content: The low axle smallsat correspondence is the important domain which in the recent years satellite communication application was on the rise, "innovated" the smallsat is our country develops has the completely proprietary intellectual property rights memory and the repeater corresponds the smallsat, cascom grasps the terminal is specially for this smallsat development low power loss ground hand-hold correspondence terminal, supported the modulation data rate to reach 76.8kbps the BPSK narrow-band channel. Based on TI Corporation's low power loss 16 fixed ...

Saturday, July 4th, 2009 at 19:35 | No comments

Categories: DSP

Tags: development kit, DSP, Phase-locked loop

Short Content: Abstract: The COSTAS link is one kind of closed loop self-adaptive system, uses in withdrawing the coherent carrier. This article mainly introduced one kind uses in the carrier synchronization the higher order COSTAS ring circuit, uses in completing MPSK in the demodulation carrier synchronization. This article proposed one kind the COSTAS ring circuit's simplified structure which is advantageous for the software to realize, uses in completing 8PSK the carrier synchronization, and discussed in detail has adopted the digital signal processor ...

Monday, April 20th, 2009 at 15:59 | No comments

Categories: Power Supply

Tags: IGBT, Induction heating, Phase-locked loop, Power source

Short Content: Abstract: The induction heating power source smelted, professions and so on casting, forging, heat penetration, quenching, elbow piece, agglutination, superficial heat treatment, braze as well as crystal growth in the metal obtained the widespread application. At the same time, as a result of the induction heating power source's heating characteristic, the ultrasonic frequency, the high efficiency is one of induction heating power source area research key. Introduced in detail designs the induction heating power source, has given the method which ...

Friday, February 13th, 2009 at 04:02 | No comments

Categories: Power Supply

Tags: Contravariant power source, magnetic circuit, phase symmetrical, Phase-locked loop

Short Content: Abstract: Cannot satisfy willfully the balancing load shortcoming in view of the conventional three-phase inversion power source, proposed one kind of combined three-phase inversion power source, its electric circuit and magnetic circuit complete decoupling. The various phase voltages independent control, the phase uses the phase-locked loop to carry on the closed-loop control separately, causes the output voltage the phase to track the respective reference phase, has guaranteed the output voltage and the phase symmetry. The experiment had proven circuit design's ...

Tuesday, October 14th, 2008 at 00:54 | No comments

Categories: Power Supply

Tags: Phase-locked loop

Short Content:     Abstract: Proposed one kind of ultrasonic frequency induction heating power source's phase-lock control technology, the use phase-locked loop's phase-lock filter function, enables the invertor to have the steady separate excitation and the autoexcitation switching process; Introduces the detention link in the phase-locked loop, not only has compensated control circuit's inherent delay, moreover enables the invertor to have the precise triggering time in advance.     Key word: Current mode invertor; Induction heating; Phase-lock control 1 outline Because the induction heating ...

Thursday, September 11th, 2008 at 11:49 | No comments

Categories: DSP

Tags: DSP, Phase-locked loop, software

Short Content:     Along with the large scale integrated circuit and the high speed figure signal processor's development, the correspondence domain's signal processing more and more puts in the digital territory to realize. The software phase lock technique is a research subject which the development and the high speed DSP appearance develops along with the software radio. The phase lock technique which uses in the software radio receiver is and so in the general programmable component realizes the form based on the ...

Friday, September 5th, 2008 at 21:02 | No comments

Categories: EDA/PLD

Tags: EDA, Phase-locked loop, programmable logic component

Short Content: 1 introduction 　　The phase-locked loop in domain applications and so on correspondence, radar, survey and automated control is extremely widespread, already became in each kind of electronic installation the essential basic part. Develops along with the electronic technology to the digitized direction, needs to use the digital form to realize signal phase-lock processing. Therefore, obtained more and more attention to the entire digital phase-locked loop's research and the application. 　　The traditional digital phase-locked loop system is the hope through uses ...

Saturday, August 9th, 2008 at 22:06 | No comments

Categories: EDA/PLD

Tags: Phase-locked loop

Short Content:     Abstract: Internal realizes the entire digital phase-locked loop use in FPGA to be extremely broad. This article makes the improvement in the integrated digit phase-locked loop 74297 foundations, has designed the phase-lock condition examination electric circuit, coordinates CPU to carry on the dynamic intelligent disposition to the ring circuit filter parameter, thus causes the phase-locked loop to enter the fixed condition fast, in the shortest time normal work and enhancement output frequency quality.     Key word: Entire digital phase-locked ...