Circuit for undisturbed clock signal switching

摘要

The circuit has a NOX logic gate (104) for outputting the synchronization signal (105) according to NOX logic function between clock signals (101, 102). A D flip-flop type logic circuit (106) receives the signal (105) and a signal (108) from a frequency detector (107), and produces a control signal (109) at the destination of a clock switch (103) piloting the switching between the signals (101, 102), such that a clock signal (110) is equal to the signals (101, 102) when the frequency of the signal (101) is equal to low and high clock frequencies (F1, F2) of the signal (101), respectively.