A 450 MHz CMOS RF power detector

An RF power detector based on a CMOS logarithmic/limiting amplifier achieves 50 dB dynamic range at 450 MHz. The logarithmic accuracy is +/- 1dB over the temperature range 0 to 85 degC. The chip is fabricated in 0.35 um double-poly triple-metal CMOS and consumes 10 mA with a 3 V supply.