The amplifier`s input stage is a dual-gate GaAs FET, which provides low input capacitance and high transconductance. The dual-gate structure accepts the signal on input 1. Input 2 controls the gain of the amplifier. The amplifier has a third input for use in series feedback. The output feeds back to pin 3 via a single resistor, which controls the overall power gain of the amplifier.
Wideband-500khz-1ghz-hybrid-amplifier - schematic

At 10 MHz, the output is capable of delivering 12 dBm into a 50-0 load with 1 dB of signal compression. The ac-coupled amplifier has a gain of 37 dB at 100 MHz and 3 dB at 1 GHz.

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