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  synthesizer
A Digital Synthesizer of Ultralow Frequencies for Biophysical Investigations
      
The synthesizer forms pulses in a frequency range of 0.1-10 Hz with a control step of 0.1 Hz.
      
A Digital AC Waveform Synthesizer Based on a Josephson Junction Chip with Binary Sections
      
A low-frequency waveform synthesizer based on the Josephson-junction (JJ) array is described.
      
Application-specific software has been developed to control the synthesizer.
      
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  combiner
A simple fast correlation attack is used to analysis the security of Bluetooth combiner in this paper.
      
It is also shown that the security of the modified Bluetooth combiner by Hermelin and Nyberg is not significantly enhanced.
      
Algebraic attack on Filter-Combiner model keystream generators
      
Algebraic attack was applied to attack Filter-Combiner model keystream generators.
      
A new criterion for designing Filter-Combiner model was also proposed: the total lengthL of Linear Finite State Machines used in the model should be large enough and the degreed of Filter-Combiner function should be approximate [L/2].
      
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  synthesizers
Block-circuits of phase-locked systems, which act as frequency synthesizers and misphasing correctors, for timing oscillators of digital signal processers are designed.
      
This principle is used for constructing acoustic synthesizers allowing communication with birds and control over their behavior.
      
Digital Synthesizers of Frequency-Modulated Signals
      
The method of digital synthesis is based on the straightforward calculation of the output signal phase used to increase the operation rate and to extend the functional capabilities of digital frequency synthesizers.
      
Design of fully integrated programmable PLL frequency synthesizers for microprocessor clocking at 1-1500 MHz
      
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A digtal freguency synthesizer for Type-FDH singleband transmitter is introduced here . An analysis of the various components in this apparatus together with the methods of reducing their phase noise is also dealt with in this paper.

本文介绍了用于FDH型单边带发射机中的数字式频率合成器,分析了该合成器中的各个部件以及如何减低它们的相位噪声.

Phase-locking solid-state microwave oscillator is an important unit in modern communication and microwave freguency sythesizer. Its principle of operation is explained in this paper. Mathematical representation of the phase-detector and block diagram of the phase model are given. The loop filter and the voltage-controlled oscillator are also discussed.

微波取样锁相固态源已成为现代通信、微波频率合成器中的一个关键性部件。本文叙述了它的工作原理,着重讨论了取样鉴相器,给出了它的数学表示式和相位模型方框图,也分析了环路滤波器和压控振荡器。

By an analysis of the phase noise of the frequency synthesizer using MPLL with IGO, it is found that the phase noise of this kind of synthesizer can be diminished in contrast to that of the frequency synthesizer using microwave analogous PLL or microwave analogous-digital PLL. The MPLL with IGO is promising owing to its simple construction and low cost.

本文在详细地分析微波脉锁环频率合成器的相位噪声的基础上,否定了一般认为这种合成器相位噪声大的观点,指出了它可以优于微波模拟环和微波模拟数字环合成器,并且由于它结构简单、成本低,所以是一种有前途的频率合成器.

 
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