An Ultra-Low-Power Reconfigurable Power-On Reset for Multi-Supply
Voltages Applications
Abstract
In this letter, an ultra-low-power power-on-reset circuit with
reconfigurable trip-voltages is proposed. In order to reduce area and
power consumption overhead, an all-MOS sub-threshold architecture based
on threshold difference voltage references and current comparator is
designed. By configuring the reference current and the different
threshold transistors, the different trig voltages are generated to
detect multi-supply voltages. Simulation results based on 55 nm CMOS
process show that the proposed power-on-reset circuit generates trip
voltages of 385.5 mV and 775.4 mV, consuming only 8.5 nA and 92.6 nA at
the supply voltage of 0.5 V and 1 V, respectively. And the area of the
proposed power-on-reset circuit is as low as 240 μm2.