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A bipolar monolithic amplifier is described which achieves 18 dB gain, 725 MHz-3 dB bandwidth and 4.4 dB noise figure. The circuit is housed in a 4-lead TO-46 package, consumes 180 mW of DC power and requires no external components. Input and output impedances are matched to 50 /spl Omega/ with VSWR less than 1.5 across the band. A high-power version of the circuit consumes 1 W of DC power and gives 152 mW output power at 200 MHz.