A miniaturized low-power synthesizer module with automatic frequency stabilization (for portable telephone applications)

A compact low-power phase-locked loop (PLL) frequency synthesizer module which performs automatic frequency stabilization and intermittent operation is described. Two LSIs were developed to reduce both current drain and module size. One is a prescalar (3 mA at 1 GHz) using a high-performance bipolar process (SST), and the other is a PLL-AFC LSI using 1.2- mu m mixed-signal CMOS. A total current drain of 15 mA and an overall size of 1.5 cm/sup 3/ were achieved.<
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