A 1.05V 1.6mW 0.45°C 3σ-resolution ΔΣ-based temperature sensor with parasitic-resistance compensation in 32nm CMOS

In the multicore era, thermal/power management is essential in order to meet platform-performance and energy-efficiency requirements.The paper here describe about a temperature sensor for remote temperature sensing that achieves the required resolution and variation tolerances by: 1) chopping the input current to the remote BJT pair; 2) deriving a voltage reference from the same BJTs; 3) making multiple current ratio measurements to eliminate parasitic resistance; and 4) using digital demodulation to eliminate analog offsets.