以89S52單片機和EP1C6Q240C8型FPGA為控制核心的多功能計數(shù)器,是由峰值檢波、A/D轉(zhuǎn)換、程控放大、比較整形、移相網(wǎng)絡(luò)部分組成,可實現(xiàn)測量正弦信號的頻率、周期和相位差的功能。多功能計數(shù)器采用等精度的測量方法,可實現(xiàn)頻率為1Hz~10MHz、幅度為0.01~5Vrms的正弦信號的精確測頻,以及頻率為10Hz~100kHz、幅度為0.5~5Vrms的正弦信號精確測相。液晶顯示器能夠?qū)崟r顯示當(dāng)前信號的頻率、周期和相位差。該多功能計數(shù)器精度高,界面友好,實用性強。 Abstract: A multi-function counter,which uses89S52MCU and EP1C6Q240C8FPGA as a control core,consists of peak detector,A/D conversion,program-controlled amplification,compared shaping and phase-shifting network part.The counter measures the frequency,period and phase of sinusoidal signal.With the equal precision method,the multi-function counter achieves the precise frequency measurement of the sinusoidal signal which its frequency is from1Hz to10MHz,its amplitude is from0.01Vrms to5Vrms,as well as the accurate phase measurement of the sinusoidal signal which its frequency is from10Hz to100kHz,its amplitude is from0.5Vrms to5Vrms.The LCD monitor real-time displays the frequency,period and phase difference of current signal.The multi-function counter features high precision,friendly interface,and strong practical.
上傳時間: 2013-11-15
上傳用戶:gy592333
介紹了自動調(diào)溫醫(yī)用光療系統(tǒng)的結(jié)構(gòu)及軟件設(shè)計原理,溫度檢測的實現(xiàn)方式及運用DS18B20測溫的編程方法,并設(shè)計了一種用AT89C52中斷控制可控硅移相觸發(fā)的編程方法。該系統(tǒng)已成功用于醫(yī)療機構(gòu)使用。
上傳時間: 2013-11-04
上傳用戶:894898248
目前利用DDS技術(shù)產(chǎn)生信號源的方法得到了廣泛的應(yīng)用,dds技術(shù)已經(jīng)成為頻率合成技術(shù)的發(fā)展的主流方向!
上傳時間: 2013-10-16
上傳用戶:xcy122677
為了在CDMA系統(tǒng)中更好地應(yīng)用QDPSK數(shù)字調(diào)制方式,在分析四相相對移相(QDPSK)信號調(diào)制解調(diào)原理的基礎(chǔ)上,設(shè)計了一種QDPSK調(diào)制解調(diào)電路,它包括串并轉(zhuǎn)換、差分編碼、四相載波產(chǎn)生和選相、相干解調(diào)、差分譯碼和并串轉(zhuǎn)換電路。在MAX+PLUSⅡ軟件平臺上,進行了編譯和波形仿真。綜合后下載到復(fù)雜可編程邏輯器件EPM7128SLC84-15中,測試結(jié)果表明,調(diào)制電路能正確選相,解調(diào)電路輸出數(shù)據(jù)與QDPSK調(diào)制輸入數(shù)據(jù)完全一致,達到了預(yù)期的設(shè)計要求。 Abstract: In order to realize the better application of digital modulation mode QDPSK in the CDMA system, a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase,and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
標簽: QDPSK CPLD 調(diào)制解調(diào) 電路設(shè)計
上傳時間: 2014-01-13
上傳用戶:qoovoop
一本初學(xué)者好教材
標簽: PSK 移相鍵控 電路設(shè)計 調(diào)制
上傳時間: 2013-11-20
上傳用戶:unmwq
目前利用DDS技術(shù)產(chǎn)生信號源的方法得到了廣泛的應(yīng)用,dds技術(shù)已經(jīng)成為頻率合成技術(shù)的發(fā)展的主流方向!
上傳時間: 2013-11-05
上傳用戶:wyiman
為了在CDMA系統(tǒng)中更好地應(yīng)用QDPSK數(shù)字調(diào)制方式,在分析四相相對移相(QDPSK)信號調(diào)制解調(diào)原理的基礎(chǔ)上,設(shè)計了一種QDPSK調(diào)制解調(diào)電路,它包括串并轉(zhuǎn)換、差分編碼、四相載波產(chǎn)生和選相、相干解調(diào)、差分譯碼和并串轉(zhuǎn)換電路。在MAX+PLUSⅡ軟件平臺上,進行了編譯和波形仿真。綜合后下載到復(fù)雜可編程邏輯器件EPM7128SLC84-15中,測試結(jié)果表明,調(diào)制電路能正確選相,解調(diào)電路輸出數(shù)據(jù)與QDPSK調(diào)制輸入數(shù)據(jù)完全一致,達到了預(yù)期的設(shè)計要求。 Abstract: In order to realize the better application of digital modulation mode QDPSK in the CDMA system, a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase,and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
標簽: QDPSK CPLD 調(diào)制解調(diào) 電路設(shè)計
上傳時間: 2013-10-28
上傳用戶:jyycc
為提高圓光柵傳感器對角度進行數(shù)字測量的精度和分辨力,使其更加廣泛方便的應(yīng)用于航天、機器人控制等領(lǐng)域中,設(shè)計了圓光柵角度測量系統(tǒng)及其測角信號移相電阻鏈細分電路,其將測得的原始的光柵正余弦信號施加在電阻鏈兩端,在電阻鏈的接點上得到幅值和相位各不相同的電信號,經(jīng)整形、脈沖形成后就能在信號的一個周期內(nèi)獲得若干計數(shù)脈沖,實現(xiàn)信號細分。該系統(tǒng)可精確的測量大方位、大俯仰、小方位、小俯仰四個軸系的角度位置。
標簽: 光柵 信號細分 測角系統(tǒng) 電路設(shè)計
上傳時間: 2014-01-04
上傳用戶:ddddddd
為了提高幅相檢測精度、簡化電路、擴展頻率范圍,設(shè)計了一種基于AD8302高精度幅度相位檢測系統(tǒng)。通過分析AD8302的特點以及工作原理,提出了幾種提高相位檢測精度的方法,并設(shè)計采用AD8302、DDS和單片機組成高精度幅相檢測系統(tǒng),成功地解決了AD8302相位檢測過程中存在的二值性、非線性、移相以及校準問題,實現(xiàn)兩路模擬輸入信號的相位差和幅度差的精確測量。測試結(jié)果表明基于AD8302的幅相檢測系統(tǒng)具有精度高、抗干擾能力強等優(yōu)點。
上傳時間: 2013-11-24
上傳用戶:會稽劍客
SPWM輸出,SVPWM輸出,移相PWM輸出
上傳時間: 2015-04-13
上傳用戶:亞亞娟娟123
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