1、淺析對于調(diào)頻電路的設(shè)計(jì)與制作    摘要:調(diào)頻，指的是用調(diào)制信號直接控制主振蕩器回路元件的參量L或C，使載波頻率受到控制，并按調(diào)制信號的規(guī)律變化。調(diào)頻電路分為直接調(diào)頻和間接調(diào)頻。它的主要參數(shù)有調(diào)制特性、調(diào)制靈敏度、中心頻率和最大頻偏。本文先從理論上介紹了調(diào)頻電路分類，然后對不同的調(diào)頻電路進(jìn)行比較。其中重點(diǎn)對基于集成電路的調(diào)頻電路進(jìn)行了研究，并通過制作實(shí)際電路進(jìn)行比較后，觀察基于集成電路的調(diào)頻電路相對于其他調(diào)頻方式的優(yōu)越性。再對用不同集成電路制作的調(diào)頻電路進(jìn)行對比，觀察選用哪種集成電路調(diào)試出的調(diào)頻波形更好。調(diào)制特性：調(diào)頻波的頻率偏移與調(diào)制電壓的關(guān)系。調(diào)制靈

2、敏度：單位調(diào)制電壓變化所產(chǎn)生的頻率偏移稱為調(diào)制靈敏度。中心頻率：調(diào)頻波的中心頻率就是載波頻率。最大頻偏：在正常調(diào)制電壓作用下，所能達(dá)到的最大頻率偏移稱最大頻偏fm。關(guān)鍵詞: 集成電路調(diào)頻調(diào)制信號調(diào)制特性調(diào)制靈敏度載波中心頻率頻偏Abstract：    The Frequency modulation, refers is with modulation signal positive governing main oscillator return route part parameter L or C, causes the carrier frequency

3、 to receive the control, and filters the change according to the modulation signal gauge. The frequency modulation electrIC circuit divides into the direct-frequency modulation and the indirect-frequency modulation. Its main parameter has the modulating characteristic, the modulation sensitivity, th

4、e center frequency and the greatest frequency leaning. This article first theoretically introduced the frequency modulation electric circuit classification, then carries on the comparison to the different frequency modulation electric circuit.Focusing on integrated circuits based on the frequency of

5、 the circuit, through the production and compare the actual circuit, Based on the observation of the IC circuit FM frequency relative to other forms of superiority. Another pair of different frequency integrated circuits produced by the circuit contrast, Observation of the choice of the IC testing f

6、requency waveform better. Modulation characteristics：FM wave modulation frequency offset voltage relationship. Modulation sensitivity ：unit modulation voltage changes the modulation frequency offset as sensitivity. Center frequency ： FM wave frequency is the center carrier frequency.the greatest fre

7、quency leaning ：the normal modulation voltage, it can achieve the maximum frequency offset the biggest shift fm said.Key words:IC  Frequency modulation   Modulation signal   Modulating characteristic   Modulation sensitivity    carrier frequency 

8、;   the center frequency   the greatest frequency leaning 目 錄第一部分摘要第一章  緒論    41.1 導(dǎo)言     41.2 信息傳輸   41.3 本課題的研究內(nèi)容 5 第二章角度調(diào)制 62.1 角度調(diào)制的原理 6  2.2 調(diào)頻電路  9 第三章方案論證及硬件電路的實(shí)現(xiàn)  143.1  方案的選擇  14  3.2