A process/temperature variation tolerant RSSI
Process/Temperature Variation Tolerant RSSI

A low power process/temperature variation tolerant CMOS received signal strength indicator (RSSI) and limiter amplifier are designed using SMIC 0.13μm CMOS technology. The limiter uses six-stage amplifier architecture for minimum power consideration. The RSSI has a dynamic range more than 60dB, and the RSSI linearity error is within ±0.5dB for an input power from -65dBm to -8dBm. The RSSI output voltage is from 0.15V to 1V and the slope of the curve is 14.17mV/dB. Furthermore, with the compensation circuit, the proposed RSSI shows good temperature-independent and good robustness against process variation characteristics. The RSSI with integrated AGC loop draws 1.5mA (I and Q paths) from a 1.2V single supply.