首先簡要溫度傳感器鉑電阻PT100的特性以及測溫的方法,在此基礎上闡述基于PT100的溫度測量系統設計,包括硬件與軟件。采用C8051F41單片機,OP07放大器,鉑電阻PT100及4位數碼管組成系統,C語言編程。
上傳時間: 2013-10-17
上傳用戶:bqc1245824354
Abstract: This application note discusses the REF pin functionality in the indirect current-feedbackarchitecture for instrumentation amplifiers. This article compares the importance of a REF buffer in a
上傳時間: 2015-01-03
上傳用戶:時代將軍
特點: 精確度±0.15%滿刻度 可同時測量交流相電壓,線電壓,電流,實功率,虛功率,功率因素,頻率,仟瓦小時 輸入配線系統可任意選擇(1f2W/1f3W/3f3W/3f4W) CT比與PT比可任意設定(1至9999) 手動與自動顯示模式可任意規劃 3組警報控制功能 數位RS-485界面
上傳時間: 2013-11-14
上傳用戶:life840315
特點 顯示范圍0至19999(瞬間量),0至999999999(9位數累積量)可任意規劃 精確度0.03%滿刻度(瞬間量) 頻率輸入范圍 0.01Hz 至 10KHz 瞬間量與累積量時間基數可任意規劃(1 或 60 或 3600 秒) 瞬間量之最高顯示值可任意規劃(0至19999) 累積量之輸入脈波比例刻畫調整可任意規劃(0.00001至9999.99999) 具有二組警報功能 15 BIT 隔離類比輸出 數位RS-485 界面 數位脈波同步輸出功能
上傳時間: 2014-11-07
上傳用戶:xaijhqx
特點 顯示范圍-19999至99999位數 最高輸入頻率 10KHz 計數速度 50,5000脈波/秒可選擇 四種輸入模式可選擇(加算,減算,加減算,90度相位差加減算 90度相位差加減算具有提高解析度4倍功能 輸入脈波具有預設刻度功能 2組警報功能 15 BIT 類比輸出功能 數位RS-485介面
上傳時間: 2013-10-15
上傳用戶:1039312764
特點 精確度0.05%滿刻度 可顯示與產生精密直流毫安電流,直流電壓,頻率(脈波) 可模擬90度相位差脈波輸出功能 高解析度類比輸出功能(15bit DAC) 類比輸出范圍0至20.000毫安培(0至10.000伏特) 寬范圍頻率輸出功能10Hz至4KHz 寬范圍脈波輸出功能1至10000個 尺寸小,穩定性高
上傳時間: 2013-11-03
上傳用戶:yy_cn
介紹了超聲波測距系統原理,針對超聲波測距系統中常用的40 kHz超聲波信號,提出了超聲波接收電路設計原則,采用了集成運放OP27構成的同相放大器、儀表放大器、CX20106A紅外接收芯片3種方案來檢測超聲波信號,設計了3種方法對應的接收電路,分析了各自的特點。
上傳時間: 2013-10-15
上傳用戶:時代將軍
The AN10 begins with a survey of methods for measuring op amp settling time. This commentary develops into circuits for measuring settling time to 0.0005%. Construction details and results are presented. Appended sections cover oscilloscope overload limitations and amplifier frequency compensation.
上傳時間: 2013-11-14
上傳用戶:JIMMYCB001
基于通用集成運算放大器,利用MASON公式設計了一個多功能二階通用濾波器,能同時或分別實現低通、高通和帶通濾波,也能設計成一個正交振蕩器。電路的極點頻率和品質因數能夠獨立、精確地調節。電路使用4個集成運放、2個電容和11個電阻,所有集成運放的反相端虛地。利用計算機仿真電路的通用濾波功能、極點頻率和品質因數的獨立控制和正交正弦振蕩,從而證明該濾波器正確有效。 Abstract: A new multifunctional second-order filter based on OPs was presented by MASON formula. Functions, such as high-pass, band-pass, low-pass filtering, can be realized respectively and simultaneously, and can become a quadrature oscillator by modifying resistance ratio. Its pole angular frequency and quality factor can be tuned accurately and independently. The circuit presented contains four OPs, two capacitors, and eleven resistances, and inverting input of all OPs is virtual ground. Its general filtering, the independent control of pole frequency and quality factor and quadrature sinusoidal oscillation were simulated by computer, and the result shows that the presented circuit is valid and effective.
上傳時間: 2013-10-09
上傳用戶:13788529953
在Multisim 10軟件環境下,設計一種由運算放大器構成的精確可控矩形波信號發生器,結合系統電路原理圖重點闡述了各參數指標的實現與測試方法。通過改變RC電路的電容充、放電路徑和時間常數實現了占空比和頻率的調節,通過多路開關投入不同數值的電容實現了頻段的調節,通過電壓取樣和同相放大電路實現了輸出電壓幅值的調節并提高了電路的帶負載能力,可作為頻率和幅值可調的方波信號發生器。Multisim 10仿真分析及應用電路測試結果表明,電路性能指標達到了設計要求。 Abstract: Based on Multisim 10, this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier, the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor, the width of frequency was adjusted by using different capacitors provided with multiple switch, the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit,the ability of driving loads was raised, the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上傳時間: 2014-01-21
上傳用戶:shen007yue