混波器之設計

Abstract

Time is changing, and things are changing, too. In recent years, PCS( Personal communication system ) is a hot topic. However, the portable revolution has been going on for many years. PCS working under battery supplyrequires low supply voltage and low power components, and it seems that CMOS IC( Complementary Metal Oxide Semiconductor Integrated Circuit ) is suitable.With the channel length of CMOS transistor scaling down year by year, CMOS RF--ICs are practical today, but there are still a lot of difficulties unsolved. The goal toward one chip system ( with only supply, needed inputs but without any additional components ) is a major challenge. This thesis describes a simple experimental system for indoor Cord-less Telephone. We implement the RF ( Radio Frequency ) and IF ( Intermediate Frequency ) mixing and filtering ( Demodulation and PLL are not included ). We utilize the Gilbert-like structure to implement the two mixers, two folded-cascode differential Op-Amps for IF filtering and IF Amplifying, and one single-ended OPAMP for power amplifying and off-chip loads driving. The chip has already fabricated by CIC( Chip Implementation Center) and the chip size is 2300*2297.45 micrometer square. The chip consumes total about 3.14mW at 3V voltage supply operating.