0.5 V switching current integrator

A switching current integrator that works in an environment with a low supply voltage is presented. The sampling transistors are all realised using PMOSs, by connecting their body to the ground, in order to lower their threshold voltage. The current sources are constructed using NMOSs by tying their gate to the supply voltage, in order to minimise the voltage required between drain and source. In this type of approach, the proposed switching current integrator works at a supply voltage of 0.5 V, using a sampling frequency of 100 MHz in a 0.18 μm CMOS technology.