Reference Design for Implementation of the Load Sharing Concept for Large-Signal Applications


Design files


Using the THS3091 high voltage, low distortion current-feedback op amp, this reference design showcases the technique and the benefits of configuring multiple op-amps in a load sharing configuration when driving high voltage signals into heavy loads.  Supported by a full scale application report, the design can be easily adjusted for a given application.

  • 15V supply voltage
  • Up to 24VPP output swing
  • Third-Harmonic Distortion of 32dBc when driving a 20VPP, 70MHz sine wave into a 100Ω load (double-terminated 50Ω cable)
  • Second-Harmonic Distortion of 38dBc when driving a 20VPP, 70MHz sine wave into a 100Ω load (double-terminated 50Ω cable)
  • High Current Drive Capability (up to 400mA with two THS3091 op amps)
  • This reference design has been lab tested and is supported with design files and a design guide

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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU153.PDF (622 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR163.PDF (83 K)

Detailed schematic diagram for design layout and components

TIDR164.PDF (99 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC109.ZIP (177 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

High-speed op amps (GBW ≥ 50 MHz)

THS3091Single, high-voltage low-distortion current-feedback operational amplifier

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report TIDA-00023 Test Results Sep. 17, 2013

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