The PC8104GR is a silicon monolithic integrated circuit designed as quadrature modulator for digital mobile communication systems. This modulator consists of 1.9 GHz up-converter and 400 MHz quadrature modulator which are packaged in 20 pin SSOP. The device has power save function and can operate 2.7 to 5.5 V supply voltage, therefore, it can contribute to make RF block small, high performance and low power consumption.