PURPOSE:To improve the linearity of the modulation signal by inserting the parallel circuit of the diode and the resistance in series to the line which supplies the modulation signal. CONSTITUTION:The current-voltage characteristics of the diode in bridge-type modulator circuit 2 features the square...
circuit 7 3.2.2 调制电路参数设置 图 3-4 信号源参数设置 Fig.3-4 Set the source parameter 图 3-5 调制器参数设置 Fig.3-5 Modulator parameter settings 8 图 3-6 解调器参数设置 Fig.3-6 Set the demodulator parameters 图 3-7 零阶保持器参数设置 Fig.3-7 The zero-order holder parameter ...
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This modulating message signal is superimposed onto the carrier wave by an electronic circuit called a modulator. In the modulator, the amplitude of the carrier is varied in direct proportion to the instantaneous amplitude of the modulating message signal. So if the message signal amplitude increases...
Diode Modulator. One of the simplest amplitude modulators is the diode modulator described in Sec. 4-1. The practical implementation shown in Fig. 4-7 consists of a resis-tive mixing network, a diode rectii er, and an LC tuned circuit. The carrier (Fig. 4-8b) is applied to one input...
1.2 AM调幅技术 (1)1.3 调幅技术的发展 (1)第二章调幅发射机构成 (2)2.1 调幅发射机方框图 (2)2.2 调幅发射机的比较重要的指数 (2)第三章调幅电路的设计 (3)3.1 方案的分析及选择 (3)3.2 DSB其调幅的原理 (3)3.3 以MC1596(MC1496)为核心的调幅电路 (4)第四章调幅电路的仿真与制作 (7)...
This experiment was designed based on DDS AM modulator, a complete circuit design, use QuartusII, simulation, test, hardware work through the output signal waveform oscilloscope observation. 关键词 DDS直接数字频率合成QuartusIIAM调制 Keyword DDSQuartusII AM modulation 目录 1.设计要求说明···3 1.1...
Keywords :: Amplitude modulation circuit, Analog systems, Modulator MC1496 chip 1 第一章 绪论 1.1 调幅发射机的基本知识 载波信号被调制,把控制该过程的参数叫做调制。高频的调制信号,是通过改变控制振荡器的振幅来改变振幅调制信号的变化量,而且它们是成正比关系!那这个过程就被叫做幅度调制。经过高频调幅波振荡...
心理学 资格/认证考试 金融/证券 文学/艺术/军事/历史 图书 杂志 股票 医疗 论文 > 大学论文 > am 调制器 ammodulator doublesideband-suppressed carrier modulation double sideband-suppressed carrier (dsb-sc) modulation consists messagesignal carrierwave keycircuit going used.however, won’thave good...