The 6220 is a Current Source from Keithley. A current source is a type of electronic test equipment in circuit form that can deliver or absorb electrical current that’s independent of the voltage across its terminals. There are two types of current sources: dependent and independent. A dependent current source delivers an electric current that is proportional to another voltage in the circuit. An independent current source delivers a constant current.
Source and sink (programmable load) 100fA to 100mA
1014ω output impedance ensures stable current sourcing into variable loads
65000-point source memory allows executing comprehensive test current sweeps directly from the current source
Built-in RS-232, GPIB, Trigger Link, and digital I/O interfaces
Reconfigurable triax output simplifies matching the application's guarding requirements
Model 220 emulation mode eliminates need to reprogram existing applications
The Keithley 6220 DC Current Source 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 Model 6220 ideal for applications like Hall measurements, resistance measurements using delta mode, pulsed measurements, and differential conductance measurements.