| 摘要 |
The invention relates to a method for generating an internal clock pulse in an electric circuit, using a first clock-pulse generator (1) and a second clock-pulse generator (2), each of said generators (1, 2) having at least one connection for an external reference clock-pulse source (7, 8) and at least a first (3, 4) and a second (5, 6) phase-locked loop (PLL). The respective first PLLs (3, 4) of both clock-pulse generators (1, 2) are synchronised to clock-pulse signals of different reference clock-pulse sources (7, 8). The second PLL (6) of the second clock-pulse generator (2) and the second PLL (5) of the first clock-pulse generator (1) generate signals based on clock-pulse signals provided by the first PLL (3) of the first clock-pulse generator (1), or the second PLL (6) of the second clock-pulse generator (2) and the second PLL (5) of the first clock-pulse generator (1) generate signals based on clock-pulse signals provided by the first PLL (4) of the second clock-pulse generator (2), as soon as said second generator (2) ascertains that no clock-pulse signals are being provided by the first PLL (3) of the first clock-pulse generator (1). The invention also relates to an electric circuit that can be used accordingly. |
