High speed digital received signal strength indicator circuit

n n A high-speed digital received signal strength indicator (RSSI) circuit is provided. The high speed digital RSSI circuit includes an amplifying unit which includes a plurality of amplifiers connected in series for amplifying a received signal through multiple stages, a thermal code generating unit for generating a thermal meter code of 2bits by using a pair of output signals that are outputted from each of the amplifiers of the amplifying unit and have an inversed phase to each other, and a binary code converting unit for converting the thermal meter code of 2bits into a binary code of n+1 bits, and thus outputs the binary code as digital RSSI data for controlling the gain of the received signal