The µPC1658G is a silicon monolithic integrated circuit designed as amplifier for high frequency system applications. Bandwidth and output power level can be determined according to external resistor constants of negative feedback and final stage collector. This IC is available in 8-pin plastic SOP. This IC is manufactured using NEC’s 10 GHz fTNESAT TM II silicon bipolar process. This process uses silicon nitride passivation film and gold electrodes. These materials can protect chip surface from external pollution and prevent corrosion/migration. Thus, this IC has excellent performance, uniformity and reliability.