Transistor-mismatch-insensitive current comparator cell

摘要

This invention relates to a method and apparatus for converting a current signal into a two-level output voltage depending on a reference current signal. In one embodiment, a first current, which is the reference current signal is applied to the apparatus. A negative feedback sets the output of the apparatus in a certain configuration. Any current signal to be compared to the reference current signal may be then applied. The output voltage level depends on whether the current signal is lower or higher than the reference current signal.