簡介
LNHS SP1004
低雜訊低漂移 (LNLD) 差動放大器結合了超低輸入電壓雜訊和優異的穩定性（低偏移電壓漂移）。這款 1 MHz 頻寬的真差分電壓放大器具有浮動輸入和主動穩定偏移電壓漂移等獨特功能。使用分立式雙 J-FET (IF 3602) 輸入級可達到低輸入電壓雜訊。我們只仔細篩選最佳、最低雜訊的輸入電晶體。
我要諮詢低雜訊低漂移 (LNLD) 差動放大器結合了超低輸入電壓雜訊和優異的穩定性（低偏移電壓漂移）。這款 1 MHz 頻寬的真差分電壓放大器具有浮動輸入和主動穩定偏移電壓漂移等獨特功能。使用分立式雙 J-FET (IF 3602) 輸入級可達到低輸入電壓雜訊。我們只仔細篩選最佳、最低雜訊的輸入電晶體。
低雜訊低漂移差分放大器體積小、重量輕（290克），可以方便地安裝在實驗裝置附近，例如直接安裝在分線盒或低温恒温器上。 這個多功能的實驗室電壓前置放大器提供了3個數量級的增益，從100到10000，整合低通濾波器截止頻率在100 Hz到1 MHz之間。 遠端控制單元可遠程調節增益和濾波器設置。 交流或直流耦合，輸入電阻可以在10 MΩ，1 GΩ，和無窮大（僅直流）之間切換。 該元件可承受高達±1V的共模電壓。
低雜訊 J-FET 輸入級的偏移電壓漂移經由精確的伺服控制迴路降低至 0.3 μV/K 以下。這種獨特的功能只有我們的前置放大器才能提供。在其它商用儀器中，輸入電壓可能會隨時間漂移數十 μV。在應用於裝置的電壓與μV等級相關的實驗中，穩定的輸入電壓偏置非常有價值。
The low-noise low-drift (LNLD) differential amplifier combines ultra-low input voltage noise and excellent stability (low offset voltage drift). This 1 MHz bandwidth true-differential voltage amplifier offers unique features such as a floating input and actively stabilized offset voltage drift. Low input voltage noise is reached using a discrete dual J-FET (IF 3602) input stage. We carefully screen and select only the best, lowest noise input transistors.
The units are small and light (290 grams) and can easily be mounted close to the experiment, e.g., directly on the breakout box or the cryostat. This versatile laboratory voltage preamplifier offers three decades of gain, from 100 up to 10000, and an integrated low-pass filter with a cut-off between
100 Hz and 1 MHz. A remote control unit is available to adjust gain and filter settings remotely. AC or DC coupling is possible, and the input resistance can be switched between 10 MΩ, 1 GΩ,, and infinite (DC only). The device tolerates a common-mode voltage of up to ±1 V.
The offset voltage drift of the low noise J-FET input stage is reduced by a precise servo control-loop to below 0.3 μV/K. This unique feature is only offered by our preamplifiers. In other commercial instruments, the input voltages may drift by many 10s of μVs over time. In experiments where the voltage applied to the device is relevant to the μV level, the stabilized input voltage bias is very valuable.