| 1. | A simple structured chaotic modulation circuit for secure communication system
一种结构简捷的混沌调制保密通信系统电路 |
| 2. | Application of scanning velocity modulation circuit in digitalized color tv receiver
扫描速度调制电路在数字化彩电中的应用 |
| 3. | The laser source was modulated by the modulation circuit , so that the fluorescence signal was modulated
信号调制电路通过对传感器系统的激光光源进行调制来调制荧光信号。 |
| 4. | In order to solve the problem of weak fluorescence , the signal modulation circuit and signal demodulation program were designed
针对荧光信号比较微弱的问题,本文设计了光纤倏逝波生物传感器系统的信号调制电路和信号解调程序。 |
| 5. | The author introduces the hardware configuration such as the signal detection and modulation circuit , signal transmitter interface circuit and software flow like signal sampling , scales transformation conversion , signal compensation and so on
介绍了信号检测与调理电路、信号变送器接口电路等主要硬件结构，以及信号采样、标度转换和信号补偿等软件流程。 |
| 6. | The modulation circuit utilized the vector modulation technology based on fourth - harmonic mixer . the lo frequency is only quarter of carrier frequency . direct high speed qpsk digital modulation of millimeter wave signal can be realized with fairly simplified lo circuit
调制电路采用了以四次谐波混频器技术为核心的矢量调制技术，利用1 / 4载波频率作为本振信号，实现了对毫米波信号直接进行高速qpsk数字调制。 |
| 7. | In order to reduce the influence of the laser diode ’ s heat effect , a thermal control device is designed to make laser diode work under a stable temperature . the principle and application of ic - wkn is researched adequately . a signal modulation circuit including d / a converter and chip computer is designed
由于温度变化也会影响到半导体激光器的正常工作,为了减小环境温度变化和激光器的热效应对激光器本身及其输出造成的影响,本文将半导体激光器和温度控制装置设计在一起,使激光器能够在恒温下工作。 |
| 8. | The major contents of this part is composed of the basic principle of the if circuit , the affection of the noise performance of the preamplifier to the whole system , the main constitutes of the receiver and their test results and the modulation circuit of the vco , etc . the test result shows that the performance of these circuits is fairly good
内容涉及：中频电路的基本原理及指标，前置放大电路的噪声性能对整个系统性能的影响，接收机的主要组成部分(前置放大电路、 agc放大电路)的基本原理、实现方法、测试结果及分析和vco的调制信号产生电路的实现及测试结果。与前端联调结果表明该部分电路性能良好。 |
| 9. | Realization of the wide - band shaping filter in baseband is carefully analyzed , and then a low - cost realization method is brought forward . furthermore , through shaping filters , i / q route self - synchronization and compensation and revise of the nonlinearity and the imbalance of amplitude and phase of the modulation circuits are advanced
分析了基带宽带数字成形滤波器的实现难点,提出了低代价的实现方法,并利用成形滤波器解决了调制端i / q自动同步,调制电路的各种非线性和幅相不平衡的补偿校正等问题。 |
| 10. | Measurement accuracy of phase - shift laser range finders is up to millimeter level in large range through multi - frequency modulation and high precision phase difference measurement . however , laser range finders existing is not suitable for large range high speed tracing measurement for their complex multi - frequency modulation circuit and conflict between precision and speed in phase - shift measurement . in order to improve the large range measurement speed and accuracy , key technologies on multi - frequency modulation and high precision phase - shift measurement are deeply researched in this paper
相位法激光测距采用多频调制和高精度的相差测量技术可以在大范围内实现毫米甚至更高精度的测量,但现有的测量装置由于存在多频调制电路复杂和没有很好的解决相差测量的高精度和快速测量之间的矛盾问题,使得相位法激光测距很难应用于大范围目标快速的跟踪测量。 |
