An 89 μW MICS/ISM band receiver for ultra-low-power applications

This paper presents a MICS/ISM band receiver for ultra-low-power applications with a passive RF front-end. A shunt passive mixer along with low input capacitance amplifiers is introduced to decrease the large load capacitor and minimize power consumption of the Local Oscillator (LO) buffers without significant noise figure (NF) degradation. Measurement results show that the receiver consumes 89 μW from 1 V supply voltage with a NF of 7.5 dB and a voltage gain of 47.6 dB. S11<;-10 dB can be achieved at the frequency range of 400-450 MHz. The baseband filter achieves a third order filtering response with 1.5 MHz bandwidth. Implemented in a 130 nm CMOS technology, the receiver occupies an active area of only 0.137 mm².