Non - nyquist sampling method research on extent modulate wave signal 幅度調(diào)制波信號(hào)的欠采樣方法研究
Design and test for integrated simulation multiplier and demodulator circuit of modulated wave signal 集成模擬乘法器與調(diào)幅波信號(hào)解調(diào)電路設(shè)計(jì)與測(cè)試
Also the external field can modulate wave - transmitting strength . at the range from 8 to 9 ghz , the minimum transmissivity value existed as to batio3 erf ; the frequency where the minimum value existed was tend to the lower frequency under the external field 4 .對(duì)于欽酸鋇電流變液,在8一gg頻段范圍內(nèi),微波透過率存在最小值,而且隨電場(chǎng)強(qiáng)度增加透過率最小值點(diǎn)向低頻方向移動(dòng)。
Step power is the key for step magnetic potential , the pulse width modulate technology that selects the triangle wave as the carrier and ladder sine wave as the modulate wave is researched , furthermore the design of the actuator drive adopts dsp as the digital controller is introduced 步進(jìn)電源是產(chǎn)生步進(jìn)磁勢(shì)的關(guān)鍵,文章研究了三角波為載波,階梯正弦波為調(diào)制波的脈寬調(diào)制技術(shù),進(jìn)而介紹了采用dsp組成全數(shù)字控制器,完成步進(jìn)電源觸發(fā)的執(zhí)行器驅(qū)動(dòng)器的設(shè)計(jì)。
Associated with the military project " high speed arbitrary waveform generator ( awg ) module " , this thesis focuses on the designing methodology of analog channel of the awg developed by uestc . signal filtering , amplitude and offset controlling , square wave and modulating wave ' s generating are studied in detail and corresponding circuit implementation are developed 本文結(jié)合電子科技大學(xué)承擔(dān)的軍用型號(hào)項(xiàng)目“ vxi任意波形發(fā)生器es14v21 ” ,展開對(duì)任意波形發(fā)生器模擬通道設(shè)計(jì)技術(shù)的研究,詳細(xì)討論了信號(hào)的濾波、放大、衰減、加偏處理以及方波和調(diào)幅波的產(chǎn)生方式,并設(shè)計(jì)了具體電路。