A 0.25 μm CMOS Low Power RF Multiplier for Ultra-wide Band System Applications

A low power RF multiplier with ultra-wide signal response band is presented for ultra-wide band system applications such as an UWB demodulator (FM-UWB) or RF-correlator (impulse-radio). The principle of operation and the bandwidth theory is presented and discussed. The practical circuit is implemented using a 0.25μm CMOS process from UMC. The test results show an average gain of 22.5dBV^-1at 1.2 GHz and 20.8dBV^-1at 3 GHz. Across a full bandwidth of more than 700 MHz the design provides high in-band gain flatness. The circuit consumes a total of 1.3 mA from a 2.5V supply. The total circuit area is 200μmx300μm.