Method and circuit device for the safe monitoring of the clock rates in a redundant system

摘要

The method involves comparing clock signals generated in separate generators (10.0,11.0). Clock signals from at least two channels are fed to independent counters (10.3,11.3) that count at the clock rate. At least two counters are read time synchronously by processors (10.2,11.2) that exchange the read values via an interface (12) and compare exchanged and read values. Error handling is performed if the difference between or a change in the quotient of exchanged and read counter values exceeds a threshold. An Independent claim is also included for a circuit for reliable monitoring of clock rates in a redundant system.