Skyworks SKY73126-31 Voltage-Controlled Oscillator (VCO)/Synthesizer is a fully integrated, high performance signal source for base station transceivers. The device provides low phase-noise performance for 3G base station transceivers and general RF system applications. The SKY73126-31 VCO/Synthesizer is a key building block for high performance radio system designs that require low power and low phase noise. The device provides a fixed 161.92 MHz frequency source output. A 10 MHz or 32 MHz reference clock frequency could be used for this device. The integer-N Phase Locked Loop (PLL), loop filter, VCO, varactor, frequency divider and output buffer are integrated inside the device. An integrated 3.3 V voltage regulator provides superior phase-noise performance. The SKY73126-31 is programmed through a three-wire Serial Peripheral Interface (SPI). The SKY73126-31 VCO/Synthesizer is provided in a compact, 16-pin Multi-Chip Module (MCM).