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低噪音电流放大器SR570,SR570低噪音电流放大器

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品 牌: 美国Stanford Research 
型 号:SR570 
产品名称:低噪音电流放大器SR570,SR570低噪音电流放大器 
单 价:面议 
起 订: 
供货总量:
发货期限:自买家付款之日起3 天内发货
所在地:广东 深圳市
有效期至:长期有效
最后更新:2017-04-28
浏览次数:80
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低噪音电流放大器SR570,SR570低噪音电流放大器

  美国Stanford Research低噪音电流放大器SR570,SR570低噪音电流放大器
激光二极管控制器,光学快门,可编程温度控制器,小仪器模块,锁相放大器,光学斩波器,前置放大器,数字延时发生器,高压电源,门控积分,BOXCAR平均器,光子计数器,
SR570是一款电流增益可达1 pA/V的低噪声电流前置放大器。高增益、宽带宽和许多优点使SR570 成为光子多样性测量和低温测量的理想工具。

美国Stanford Research低噪音电流放大器SR570,SR570低噪音电流放大器


美国Stanford Research低噪音电流放大器SR570,SR570低噪音电流放大器

增益

SR570具有1pA/V到1mA/V范围的灵敏度设置, 并可以以1;5的顺序进行选择。它同时具有游标 增益调节器,你可以选择灵敏度范围内的任意值。 为优化设备的性能,增益可以设定在放大器的不同级别。低噪声模式将增益放在了放大器的前端来使噪声性能达到最好。在它后面的是宽带宽模式增益,这样可以提高放大器前端的频率响应。在低漂移模式,输入放大器由一个输入电流非常低的放大器所代替,这样减小了设备1000倍的DC漂移。

滤波器

SR570有两个一级RC滤波器,它们的截至频率和类型都可通过前面板进行设置。它们可设定成6或12dB/oct的滚转下低通滤波器或高通滤波器,也可设定成6或12dB/oct的滚转下带通滤波器。截至频率可以以1−3−10的顺序从0.03Hz到1MHz进行调整。当使用长滤波时间常数时,滤波器的重设按钮可以用来缩短设备的过载恢复时间。

输入偏差和 DC 偏置

输入电流偏差调节器能抑制任何不想要的DC背景电流。偏差电流可以以0.1 %的增量从±1pA定义到±1mA。SR570还有可调节的输入DC偏置电压(±5 V),允许你直接将电流降到有效零值(模拟接地)或可选的DC偏置。

The SR570 is a low-noise current preamplifier capable of current gains as large as 1 pA/V. High gain and bandwidth, low noise, and many convenient features make the SR570 ideal for a variety of photonic, low temperature and other measurements.

SR570 Current Preamplifier
  • 5 fA/√Hz input noise
  • 1 MHz maximum bandwidth
  • 1 pA/V maximum gain
  • Adjustable bias voltage
  • Two configurable signal filters
  • Variable input offset current
  • Line or battery operation
  • RS-232 interface

SR570 Current Preamplifier

The SR570 is a low-noise current preamplifier capable of current gains as large as 1 pA/V. High gain and bandwidth, low noise, and many convenient features make the SR570 ideal for a variety of photonic, low temperature and other measurements.

Gain

The SR570 has sensitivity settings from 1 pA/V to 1 mA/V that can be selected in a 1-2-5 sequence. A vernier gain adjustment is also provided that lets you selec any sensitivity in between.

Gain can be allocated to various stages of the amplifier to optimize the instruments performance. The low noise mode places gain in the front end of the amplifier for the best noise performance. The high bandwidth mode allocates gain to the later stages of the amplifier to improve the frequency response of the front end. In the low drift mode, the input amplifier is replaced with a very low input-current op amp, reducing the instrument’s DC drift by up to a factor 1000.

Filters

The SR570 contains two first-order RC filters whose cutoff frequency and type can be configured from the front panel. Together, the filters can be configured as a 6 or 12 dB/oct rolloff low-pass or high-pass filter, or as a 6 dB/oct rolloff band-pass filter. Cutoff frequencies are adjustable from 0.03 Hz to 1 MHz in a 1-3-10 sequence. A filter reset button is included to shorten the overload recovery time of the instrument when long filter time constants are used.

Input Offset and DC Bias

An input offset-current adjustment is provided to suppress any undesired DC background currents. Offset currents can be specified from ±1 pA to ±1 mA in roughly 0.1 % increments. The SR570 also has an adjustable input DC bias voltage (±5 V) that allows you to directly sink current into a virtual null (analog ground) or a selected DC bias.

SR570 Current Noise vs. Frequency

Toggle and Blanking

Two rear-panel, opto-isolated TTL inputs provide additional control of the SR570. A blanking input lets you quickly turn off/on the instrument's gain which is useful in preventing front-end overloading. A toggle input inverts the sign of the gain in response to a TTL signal allowing you to perform synchronous detection with a chopped signal.

Battery Operation

Three rechargeable lead-acid batteries provide up to 15 hours of battery-powered operation. An internal battery charger automatically charges the batteries when the unit is connected to the line. The charger senses the battery state and adjusts the charging rate accordingly. Two rear-panel LEDs indicate the charge state of the batteries. When the batteries become discharged they are automatically disconnected from the amplifier circuit to avoid battery damage.

SR570 Bandwidth

No Digital Noise

The microprocessor that runs the SR570 is "asleep" except during the brief interval it takes to change the instrument's setup. This ensures that no digital noise will contaminate low-level analog signals.

RS-232 Interface

The RS-232 interface allows listen-only communication with the SR570 at 9600 baud. All functions of the instrument (except power on) can be set via the RS-232 interface. The RS-232 interface electronics are opto-isolated from the amplifier circuitry to provide maximum noise immunity.



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SIM910 JFET/BJT 前置放大器
SIM911 JFET/BJT 前置放大器
SIM914 350M前置放大器
SIM918 精确电流放大器
SIM921 AC 电阻桥
SIM922/923 二极管/ Pt RTD 温度监视器?
SIM923(A)/923(A) 带模拟输出的(VvsT)二极管/Pt RTD

温度监视器
SIM925 八输入通道、四线多路器
SIM928 可充电独立电压源
SIM940 10M铷频标
SIM960 100KHz 模拟 PID 控制器
SIM964 1MHz 模拟限幅器
SIM965 贝塞儿/巴特沃斯滤波器
SIM970 五位半数字电压表
SIM980 模拟加法器
SIM983 比例放大器

锁相放大器
SR510 单相模拟锁相放大器
SR530 双相模拟锁相放大器
SR810 单相数字锁相放大器
SR830 双相数字锁相放大器
SR850 数字锁相放大器
SR844 射频数字锁相放大器

光学斩波器
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前置放大器
SR560 低噪声电压前置放大器
SR570 低噪声电流前置放大器
SR550 低噪声FET输入前置放大器
SR552 低噪声双极输入前置放大器
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数字延时发生器
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高压电源
PS310 0到±1.25kV高压电源
PS325 0到±2.5kV高压电源
PS350 0到±5kV高压电源
PS355 0到-10kV高压电源
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PS370 0到-20kV高压电源
PS375 0到+20kV高压电源

门控积分/BOXCAR平均器
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SR245 计算机接口
SR250 门控积分器
SR255 快速取样器
SR272 计算机控制软件
SR280 NIM标准机箱和电源

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SR430 光子计数多道定标/平均器 美国Stanford Research低噪音电流放大器SR570,SR570低噪音电流放大器激光二极管控制器,光学快门,可编程温度控制器,小仪器模块,锁

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