MRI Gradient Amplifier Products

DSA2-50, 2-Axis Shim Amplifier

Performance Controls designs low-noise, high-power, digital MRI gradient amplifiers.

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PCI specializes in tackling unique power amplifier challenges. We do that by customizing existing products or by creating completely new designs, always in collaboration with our customers.

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  • Precision Dual-Axis Shim Amp

  • ±24 VDC, 12 A RMS 13 Apk

  • Fiber-optic Digital Interface

  • Direct Penetration Panel Mount

  • Integrated RF Filtering

  • Excellent Thermal Stability


The DSA2-50 Shim Amplifier from Performance Controls, Inc. (PCI) is specially designed to drive magnetic field shim coils in MRI and NMR applications. The DSA2-50 provides high fidelity reproduction of command signals, quick response to load disturbances, excellent thermal stability, high-reliability, and low cost of ownership. The DSA2-50 features digital communication and control via high-speed fiber-optic link. The integrated RF filtering permits direct penetration panel mounting in controlled-environment MR equipment rooms.


The DSA2-50 2-Axis Shim Amplifier can be used in these and other applications:

  • Improvement of MRI/NMR magnetic field homogeneity
  • Multi-order active shim configurations
  • MRI/NMR shim amplifier RF noise output filtering

Features and Benefits

High Efficiency Class-D Design

Ultra-low loss MOSFET’s efficiently deliver high RMS output current.

Two Axes In One Card

Greater value is provided through combining two shim amplifiers into one printed circuit card, sharing common resources.

High-Speed Fiber Optic Link

Digital fiber-optic communication interface allows easy and robust control and status feedback. Fiber-optic protocol supports up to four DSA2-50 units in a ring topology for independent control of up to eight axes.

Cost- and Space-Saving Solution

Integrated RF filtering allows directly mounting to penetration panels for clear and artifact-free MRI imaging. The need for additional wiring and filtering is eliminated, saving space and cost.

Ease of Use

Digital status provides real-time feedback of faults and warnings. Tuning options include seven factory-set tuning options and one potentiometer-based manual tuning option. Tuning settings can be selected via fiber protocol and can be unique to each axis.

PCI has a policy of continuous improvement and therefore reserves the right to update this information without notice to correct mistakes or to reflect specification changes. Please contact PCI to ask questions about this product or to confirm its specifications.