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SMD Series

Modular & Mobile

SMD Series

Modular & Mobile

The SMD-Series pushes the performance of the bipolar current source to the limits. With compact circuit boards and SMD components, the sources are reaching the lowest noise level and fastest response. The modular design allows the selection of operational units that are most important for the desired application, leaving out other modules. The sources can be supplied from the mains or from external batteries. Ideal for mobile systems. An optional manual control module and digital display make operation of the source easy also in standard lab applications.

Technical Information


Architecture Linear regulated bipolar current generator with continuous sweep through zero. Bipolar transistor technology. Based on SMD-technology. Modular operation from batteries or mains. 
Current/Voltage range Max. current up to 5A.  
Current/Voltage pairs individually as required.
Current outputs Floating or grounded (adjustable).
Shorten circuit and overvolatge protected.
Output connectors Shielded twinaxial socket

Current control

Analog Control With ±10 V control voltage. High ohmic input (5,1 MΩ) for quasi-galvanic isolation. BNC socket. 
Trigger TTL compatible trigger for switching off or on the current. User defined trigger logics. Priority over manual and analog setting. Opto-coupler. BNC socket.


Current stability and reproducibility < 10-5 under laboratory conditions with 1° temperature stability.
(< 10ppm/K)
Current noise The mains’ frequency and its harmonics on the source current are suppressed to a level below 10-5 x Imax. 
Response time Adjustable between 50 µs and 100 ms
Case Comapct electronic case.
Supply External batteries or optional internal mains voltage supply.
Cooling Air cooling


Manual Control 10-turn precision-potentiometer for manual setting of the current.
Digital Display LCD current display (3.5 digits)
Power Supply Unit Mains voltage supply (in addition to battery connections).

Applications, Notes and Downloads


High precision magnetic field control, magnetic traps, atom chips, NMR, SQUID, mobile systems, ultra low noise applications.



For further technical information, application examples, diagrams and for customisation of the current sources please contact: fortagh@highfinesse.de


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