Comparator circuit for comparing 2 electrical voltages has differential transistor amplifiers in 2 current branches with 2 current mirrors as loads and bases representing comparator input

摘要

The circuit has 2 differential transistor amplifiers (1,2) in two current branches with two current mirrors (4,5) as loads, whereby the bases of the differential amplifiers represent the comparator input and both current mirrors consist of a diode (6,9) and associated transistor (7,8). The comparator output variable is either one of the currents through the diodes, one of the voltages across the diodes or the difference between the diode voltages.