1 DDS front end of a serial communication programming procedures.

2 The transmitterof DHF uses DDS to synthesize frequency.

3 Direct digital synthesis(DDS)is an all digital frequency synthesis technique. Because of its special theory and construction, it has many kinds of modulation capability.

4 Direct Digital Frequency Synthesis ( DDS ) technology is realized on complex programmable logical component ( CPLD ) with hardware description language.

5 Then, comparing and studying the methods of DDS + PLL,[] it discussed stray and relative noise.

6 This dissertation focuses on the realization of L-band sweep signal source based on Direct Digital Synthesis (DDS) and Phase Locked Loop (PLL).

7 Based on the researching in the principle of DDS chip AD9854, This paper presents a design of wireless compass test signal generator.

8 The direct digital synthesizer(DDS) is used to sweep frequency for a sandwich piezoelectric transducer two admittance circles of the transducer about two different resonance frequencies is measured.

9 Direct Digital Synthesize (DDS) is used to generate clock signal at any frequency so that data generator can output data at any rate.

10 A new synthesis method of baseband echo power spectrum, which adopts Direct Digital Synthesis (DDS) technology, reduces greatly the clock rate and data memory.

11 DDS - 11 A digital conductivity instrument for laboratory measurements of conductivity of liquids.

12 PLL frequency synthesizer with DDS reference will adapt to local oscillator of modern radio.

13 Through the DDS CMOS chip AD 9851 , the system produces a 64 points sampling signal.

14 Document delivery service(DDS) facilitates the utilization of the traditional or non-local electronic document resources.

15 For example, the following command creates a one-member file with CCSID 62251 using Data Description Source (DDS) and places it in a library called DSTPRODLB.

16 The DDS signal generator which can adjust signal phase signal frequency and complex wave is designed.

17 The technology of direct digital frequency synthesis ( DDS ) , is a new typed synthesizer technology and signal frequency methods.

18 Realization of DDS depends on the digital device of high speed and high performance.

19 A design of frequency synthesizer combining DDS with a chain of frequency multiplier is given.

20 The DDS technique is mainly described, and the basic principle and the composition of the signal simulator are introduced with a complex structure strata echo signal.

21 With integration of DDS and computer technology, the tone burst instrument is well designed to meet the new testing standard of the sound level meter.

22 This article describes the design of a linear sweeping frequency signal generator using DDS technology.

23 This design construct an sinusoidal signal generator based on DDS(Direct Digital Frequency Synthesis), completed by MCU AT89S52 and necessary analog circuit.

24 Each of them is composed of high frequency amplifier, intermediate frequency amplifier and sampling, digital phase uprightness intersector, DDS and the S band signal inspirator for the transmitter.

25 The basic theories of the frequency synthesis , PLL , DDS, DDS + PLL are introduced first in this paper.

26 Compared to most of the programmable counter or timer circuit, the output signal of DDS chip changes fast respond in frequency switching and high accuracy.

27 The main blocks are CIC anti-alias filter, decimator, DC canceller, Iterative multiplier, half-band filter, IIR low pass filter, DDS etc.

28 The improvement efficiently(eliminates) the quantitative error of the frequency control word, simplifies the control of DDS, decreases the required source to implement DDS.

29 Theoretically study the expert system ( ES ), Decision Support System ( DDS ) respective specialty and their common characteristics.

30 Direct digital synthesis(DDS) is an advanced all digital frequency synthesis technology, based on the PM function of DDS, this paper gives the design scheme of a DDS digital phase shifter.

31 This paper introduces a DTMF software synthesizer based on DDS and its implementation and analyzes the effect of phase noise spurious noise and phase truncation error on output wave form.

32 This paper analyzes the performance of DDS hybrid PLL circuit which is now existing, and presents a novel method to design an S band frequency synthesizer using a new scheme of DDS hybrid PLL circuit.

33 Aim at the design of six lines triphase signal source based on DDS technology, the design methods of hardware and software were given out.

34 Besides that,[] you could be the winner of 32 inches Full HD TV for FREE by becoming our 300th DDS user in Malaysia.

35 This paper gives a detailed analysis of phase error caused by phase jitter in a direct digital frequency synthesizer (DDS).

36 A four-year college program in dentistry usually leads to the Doctor of Dental Surgery (DDS) or Doctor of Dental Medicine (DMD) degree.

37 The raw materials and technologies for iatric fiber were reviewed, as was the application of iatric fiber in novel drug delivery system(DDS).

38 A signal source in sonar receiver′s testing is designed, its working principle is based on DDS technology and log DAC.

39 Smokers get periodontal disease at two to three times the rate of nonsmokers, " says Sally Cram, DDS, a periodontist in Washington, D.C., and a consumer advisor for the American Dental Association.

40 Clear AFM images were ( obtained ) from PbZr _ ( 0.90 ) Ti _ ( 0.10 ) O _ 3 - Fe _ ( 0.003 ) nano powder sample prepared by DDS method.

41 This design dispenses with ROM which mainly limits the converting speed of DDS, but uses SIN function polynomial approximation directly generating digital SIN wave.

42 As we know, spurious noise of a DDS resulted from phase truncation degrades its spectral characteristics.

43 The DDS were divided into prodrug and chemical delivery system, macromolecular carrier system, microparticulate carrier system, implantable polymer system and infusion pump.

44 In this paper a method of designing and implementing Field Programmable Gate Array (FPGA) digital modulator based on the improved Direct Digital Synthesizer (DDS) technology is presented.

45 The L-Band Frequency Source applies DDS driving PLL circuit structure, which makes DDS and PLL complementary to each other, reaching the better technical index.

46 In the ultra high frequency system, the frequency compounder section of the transmitting frequency is operated with DDS/PLL technology.

47 A one-step process of synthesis of high-effective catalytic promotor DDS from diphenyldichlorosilane and methyl alcohol was put forward.

48 This system consists of DDS signal generator module, MCU control module, keyboard input module and nixie tube display module.

49 In view of universality, function generator with the core of high speed MCU uses the chips of DDS and FPGA. On the basis of generating routine sine wave, it can modulate signal frequency and range.

50 DDS - 1 type m ulti - function electronic laboratory case can meet this requirement.

51 In these cases, an external device such as a SCSI DDS tape drive will often suffice.

52 Deposit - dip - spin ( DDS ) coating method, a composite nano - powder sample preparation method for atomic force microscope ( AFM ) measurement is introduced.

53 MMW high resolution radar range profile two-step stretch processing method direct digital synthesis (DDS).

54 Applications of digital system design about LPM database 、 divider and DDS frequency synthesizer in the MAX + PLUSare introduced.

55 Impulse test. This procedure for the AD 9850 ( DDS ) Direct Digital Frequency Synthesizer C language source code.

56 SAR point target echo simulator which based on DDS chirp signal generator is introduced; it is composed of ARM controller unit and LFM signal generator unit.

57 The hardware configuration of using DDS chip AD 9956 to realize the linear modulation function is introduced.

58 Considering the effect of spurious noise and improving the quality of DDS output, the approach to compress the capacity of ROM and optimize the module design of phase accumulator.

59 Compared to the theory signal, the chirp produced by DDS under large bandwidth, may have frequency distortion due to the limited chirp-rate.

60 A . The AD 5932 DDS is a simple, programmable, digitally controlled wave form generator.

61 The direct digital synthesis (DDS) is adopted to generate the pseudo-random code clock having high precision and stability.

62 DDS (direct digital synthesis) is a sort of frequency synthesis technique, which has advantages such as short frequency conversion time, high resolution in frequencies , programmability and so on.

63 In this paper, a method of implementation of FM with multitone modulation is provided, using the ANALOG DEVICES AD7008, DDS chip.

64 And the hardware functional block diagram of the double channels DDS source by using AD9858 and chip monolithic computer 89C51is provided.

65 Based on the principle of mutual inductance coupling, this system adopts to the techniques such as DDS and realized the accurate testing of the quality parameters of electronic labels.

66 A method of generating radar multi - target phase - coherence echo based on DDS is discussed.

67 As the control modes of DDS special chips are changeless, users are difficult to get frequency modulation wave what they need.

68 Objective: To detect resistant stains of Mycobacterium leprae to dapsone (DDS) and rifampicin (RFP) and to understand the relationship between relapse and drug resistance.

69 The Data Description Specification (DDS) was used for database files, IBM 5250 screen layouts and reports.

70 Direct digital synthesis ( DDS ) is a new signal synthesis technique developed very fast in recent years.

71 DDS technique is applied in this paper to design and carry out the piezoelectric crystal admittance circle measurement machine.

72 This scheme utilizes all effective bits of phase accumulator address, and so can improve the performances of DDS, which has -70 dB of spur suppression value.

73 The structure of MRI spectrometer which is composed of DDS, digital receiver and pulse sequence generator etc, is described.

74 In receiving mode, through controlling DDS, it produces the local oscillation signal needed by down frequency conversion of the receiving signal. Then the DBF is used to form the receiving beam.

75 The spectral of a DDS system is dependent on the phase noise of the clock source and the printed circuit board design.