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低雜訊電壓放大器
Signal Recovery Low Noise Voltage Preamplifier

【Signal Recovery】鎖相放大器、前置放大器系列 信號恢復 - 前置放大器系列

低雜訊電壓放大器

簡介

5113

  • 低雜訊。
  • 單端或差動輸入模式。
  • DC~1MHz頻率響應。
  • 可選購低通、帶通或高通信號通道濾波功能。
  • 提供休眠模式,可消除數位雜訊。
  • 光隔離的RS232控制介面。
  • 使用電池或主要電源。

我要諮詢
  • 低雜訊。
  • 單端或差動輸入模式。
  • DC~1MHz頻率響應。
  • 可選購低通、帶通或高通信號通道濾波功能。
  • 提供休眠模式,可消除數位雜訊。
  • 光隔離的RS232控制介面。
  • 使用電池或主要電源。
  • 應用:
    • 聲學研究。
    • 無線電天文學。
    • AC電橋測量。
    • 示波器前置放大。
    • 霍爾效應信號放大。
  • 系統介紹:
    • 機型5113是一款高性能、低雜訊電壓前置放大器,具有可以連續調整的及可選擇的高通、低通或帶通濾波功能。其輸入可以設定為DC或AC耦合的單端或真正的差動操作,而其輸出可傳送最高達1Vpk-pk到50Ω負載。
    • 儀器所有的主要控制項目,都是透過3個前面板旋鈕及一個顯示目前的設定的背光LCD顯示幕操作。
    • 儀器還包括一個光隔離的雙向RS232介面,可用於進行遠端操作及傳送所有控制的詢問信號。
    • 由於在某些實驗中,即使是由支持這些功能的內部微處理器所引入的極低位準的雜訊,也可能造成問題,因此儀器還包括一個休眠功能,在一個預定的時間間隔後,會關閉每個數位雜訊的來源。而在休眠模式下,一旦有任何控制項作調整,前置放大器就被喚醒,並在調整完成後,回到休眠狀態。
    • 儀器可以連續使用標準配備的PS0108電源供應器的電源,或使用內部可再充電電池操作;電池是在儀器連接電源供應器時即進行充電。使用電池電源操作,可以排除麻煩的線路頻率干擾拾取及允許遠離線路電源的操作。
    • 假如待測信號是限制到一個單頻或狹窄範圍的頻率,那麼,濾波器容許選擇性的信號放大,可使後續的信號測量更容易 - 例如在一台示波器或鎖相放大器上的測量。濾波器當然也可以切換為不使用,以提供一個平坦的頻率響應。
  • 總體規格:
    • DC或AC耦合的電壓放大器,具有可調整的增益及一個最大的頻率響應範圍DC~1MHz。透過BNC連接器的單端或差動高阻抗輸入及單端輸出。
    • 具可調的截止頻率與斜率的信號通道高通/低通濾波器,可以切進電路,以提供一個整體的低通、高通、帶通或平坦響應。
    • 可經由光隔離的RS232介面,進行電腦控制。
    • 電池電源是來自內部的可充電電池,當連接單獨的電源供應器時,電池即充電。
  • 輸入:
    • 模式:A或A-B。
    • 耦合:AC或DC。
    • 阻抗:
      • AC耦合:10MΩ或100MΩ與25pF並聯及與0.1µF串聯。
      • DC耦合:10MΩ或100MΩ與25pF並聯。
    • 最大的無損壞輸入:
      • DC耦合:+ 10V,-9V。
      • AC耦合:耦合電容器可耐受100V,通過耦合電容器的暫態,絶不能超過DC耦合的操作限制。
    • 最大的線性操作輸入:
      • 共模:1V峰值。
      • 差模:如表1。
    • 共模抑制比:
      • DC~1kHz:>120dB。
      • 1kHz~1MHz:-6dB/倍頻程。
    • 增益:粗調增益x5~x50,000@1-2-5序列,精度1%;細調增益延伸範圍x1~x100,000,精度2%。
    • 過載恢復:前面板按鈕或電腦指令。
    • 電壓雜訊:典型4 nV/√Hz@1kHz參考到輸入。
  • 濾波器:
    • 類型:一個高通及一個低通級。
    • 模式;低通、高通、帶通、平坦(無濾波器)。
    • 斜率:
      • 低通:6或12dB/倍頻程。
      • 高通:6或12dB/倍頻程。
      • 帶通:6dB/倍頻程。
  • 頻率響應:
    • 平坦模式:DC~1MHz。
    • 低通:-3dB,0.03Hz~300kHz@1-3-10序列。
    • 高通:-3dB,0.03Hz~300kHz@1-3-10序列。
  • 輸出:
    • 最大的輸出電壓:在50Ω前面2Vpk-pk。
    • 輸出阻抗:50Ω±2%。
  • 電腦介面:
    • 類型:光隔離RS232。
    • 連接器:DB25 25腳母頭連接頭。
    • 傳輸速率:300~9600 baud。
    • 參數:無同位位元、8個資料位元及1個停止位元。
  • 詳細規格、配件、軟體及選購,歡迎洽詢。
  • Features:
    • Low-Noise
    • Single-ended or Differential input modes
    • DC to 1 MHz frequency response
    • Optional low-pass, bandpass or high-pass signal channel filtering
    • Sleep” mode to eliminate digital noise
    • Optically-isolated RS232 control interface
    • Battery or line power
  • APPLICATIONS:
    • Acoustic research
    • Radio astronomy
    • AC bridge measurements
    • Oscilloscope preamplification
    • Hall-effect signal amplification
  • System Overview:
    • The model 5113 is a high performance, low noise voltage preamplifier with continuously adjustable gain and selectable high, low or bandpass filtering. Its input can be configured for either single-ended or true differential operation with either DC or AC coupling, and its output will deliver up to 1 V pk-pk into a 50 Ω load.
    • All the principal instrument controls are operated via the three front-panel rotary knobs with a back-lit LCD display to show their present settings. The instrument also includes an optically isolated bi-directional RS232 interface allowing remote operation and interrogation of all controls. Since in some experiments even the very low levels of noise introduced by the internal microprocessor that supports these capabilities may cause problems, the unit includes a "sleep" function whereby every source of digital noise is turned off after a predetermined interval. When in the sleep mode the preamplifier "wakes up" as soon as any control is adjusted and goes back to sleep when adjustment is complete.
    • The instrument can either be continuously line-powered from the model PS0108 power supply supplied with it, or be run from the internal rechargeable batteries which are charged whenever the power supply is connected. Battery operation often allows troublesome line frequency pick-up to be eliminated, as well as permitting operation away from a source of line power.
    • If the signal of interest is limited to a single frequency or narrow range of frequencies then the filters allow selective signal amplification, making subsequent signal measurement, for example on an oscilloscope or a lockin amplifier, easier. The filters can of course be switched out of use to give a flat frequency response.
    • The model 5113 will be of use in applications as diverse s radio astronomy, audiometry, test and measurment, process control and general purpose signal amplification as well as being ideally suited to work with our range of lock-in amplifiers.
  • General:
    • DC or AC coupled voltage amplifier with adjustable gain and a maximum freguency response extending from DC to 1 MHz. Single-ended or differential high-impedance input, and single-ended output, via BNC connectors.
    • Signal channel high and low pass filters with variable cut-off frequencies and slope may be switched into circuit to give an overall low-pass, high-pass, bandpass or flat response.
    • Computer control via optically isolated RS232 interface.
    • Battery powered from internal rechargeable batteries, which recharge when separate line power supply is connected.
  • Inputs:
    • Modes: A or A-B
    • Coupling: AC or DC
    • Impedance:
      • AC coupled: either 10 MΩ or 100 MΩ in parallel with 25 pF and in series with 0.1 µF
      • DC coupled: either 10 MΩ or 100 MΩ in paralled with 25 pF
    • Max input without Damage:
      • DC coupled: + 10 V, -9 V
      • AC coupled: Coupling capacitors can withstand 100 V. Transients that pass through coupling capacitors must not exceed DC coupled operation limits
    • Max input for Linear Operation:
      • Common mode: 1 V peak.
      • Differential mode: See Table 1
    • Common Mode Rejection Ratio, CM.R.R.:
      • DC to 1 kHz: >120 dB
      • 1 kHz to 1 MHz: -6 dB/octave
    • Gain: Coarse gain of x5 to x50,000 in 1-2-5 sequence with an accuracy of 1%. Fine gain extends range from x1 to x100,000 with an accuracy of 2%.
    • Overload Recovery: Front-panel push button or computer command
    • Voltage Noise: Typically 4 nV/√Hz at 1 kHz referred to input - see also noise contours on page 11
  • Filters:
  • Type: One high-pass and one low-pass stage
  • Mode: Low-pass, High-pass, Bandpass, Flat (No filter)
  • Slope:
    • Low pass: 6 or 12 dB/octave
    • High pass: 6 or 12 dB/octave
    • Bandpass: 6 dB/octave
  • Frequency Response:
    • Flat Mode: DC to 1 MHz
    • Low-pass: -3 dB frequency selectable from 0.03 Hz to 300 kHz in a 1-3-10 sequence
    • High-pass: -3 dB frequency selectable from 0.03 Hz to 300 kHz in a 1-3-10 sequence      
  • Output:
    • Max Output Voltage: 2 V pk-pk ahead of 50 Ω
    • Output imipedance: 50 Ω ± 2 %
  • Computer Interface:
    • Type: Opto-isolated RS232
    • Connector: DB25 25-pin female connector
    • Baud Rate: 300 to 9600 baud
    • Parameters: No parity, eight data bits and one stop bit
  • Please feel free to contact for detailed specifications, accessories, software and options.