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吉时利6220直流电流源表将易用性与极低的电流噪声结合在一起。低电流源对于从研发到生产的测试环境中的应用至关重要，特别是在半导体，纳米技术和超导体行业中。6220的高源精度和内置控制功能使其成为霍尔测量，使用增量模式的电阻测量，脉冲测量和差分电导测量等应用的理想选择。
对于当今非常小巧的高能效电子产品，其设备测试和表征要求提供低电流水平，这要求使用精密的低电流源。较低的激励电流会在设备上产生较低的电压，并且难以测量。
两种电流源都可以通过前面板控件或通过RS-232或GPIB接口从外部控制器进行完全编程。6220可以提供100fA至105mA的直流电流。输出电压可以10mV为单位在0.1V至105V范围内设置。电压合规性（限制了电流供应时施加的电压量）对于过电压可能损坏被测设备（DUT）的应用至关重要。
6220提供了用于定义电流斜坡并使用触发器或计时器逐步完成多达65,536个输出值的预定义序列的工具；它支持线性，对数和自定义扫描。
图1.执行，分析和显示差分电导测量
图2.增量模式可降低1000比1的噪声
图3. 6220型和免费的示例启动控制软件
测量过程本身所产生的热量即使很小，也会升高DUT的温度，歪曲测试结果甚至损坏设备。
The Keithley 6220 DC Current Source Meter combines ease-of-use with exceptionally low-current noise. Low-current sourcing is critical to applications in test environments ranging from R&D to production, especially in the semiconductor, nanotechnology, and superconductor industries. High sourcing accuracy and built-in control functions make the 6220 ideal for applications like hall measurements, resistance measurements using delta mode, pulsed measurements, and differential conductance measurements.
Device testing and characterization for today's very small and power-efficient electronics requires sourcing low-current levels, which demands the use of a precision, low-current source. Lower stimulus currents produce lower - and harder to measure - voltages across the device.
Both current sources are fully programmable via the front panel controls, or from an external controller via RS-232 or GPIB interfaces. The 6220 can source DC currents from 100fA to 105mA. The output voltage can be set from 0.1V to 105V in 10mV steps. Voltage compliance (which limits the amount of voltage applied when sourcing a current) is critical for applications in which overvoltages could damage the device under test (DUT).
The 6220 offers tools for defining current ramps and stepping through predefined sequences of up to 65,536 output values using a trigger or a timer; it supports linear, logarithmic, and custom sweeps.
Figure 1. Perform, analyze, and display differential conductance measurements
Figure 2. Delta mode offers 1000-to-1 noise reduction
Figure 3. The Model 6220 and the free example start-up control software
Even small amounts of heat introduced by the measurement process itself can raise the DUT's temperature, skewing test results or even destroying the device.
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