Patent ID: 6133774
Filing Date: 2000-10-17
Classification: G06F,H03K

Abstract:
A system for providing an output clock signal by combining a first periodic input clock signal with a second, phase shifted, periodic input clock signal, said system comprising:a signal provider unit which converts the first input clock signal to a first intermediate signal and which converts the second input clock signal to a second intermediate signal; anda switch matrix having a first switch arrangement coupled between a first reference potential conductor for receiving a first signal level and a first node for deriving said output clock signal, and having a second switch arrangement coupled between the first node and a second reference potential conductor for receiving a second signal level, wherein each of the first and the second switch arrangements comprises a near node switch at said first node and a serially coupled far node switch near the respective reference potential conductor, said switches controlled by said signal provider unit by at least two signals from a signal set of the first and second input clock signals and the first and second intermediate signals to alternately pull said first node which represents said output signal to either said first or second signal level, wherein in each switch arrangement said far node switch is switched on prior to said near node switch.