Patent ID: 7626438
Filing Date: 2009-12-01
Classification: G06F

Abstract:
1. Circuit for switching between at least a first clock signal and a second clock signal belonging to a plurality of clock signals available in an electronic device in response to a corresponding switch command, that includes a selection module to select at a switch instant said second clock signal in said plurality of clock signals under the control of a select signal and provide a selected clock signal, wherein the circuit further includes a logic-based filter module situated downstream from said selection module and configured to produce an outgoing clock signal filtered under the control of a filter signal and also includes a control module configured to receive said switch command and to send said select signal to said selection module delaying said switch instant by a first interval of time, said control module also being configured to send said filter signal active for filtering to said filter module in a second interval of time that comprises one and only one edge of the first clock signal and one and only one edge of the second clock signal that are adjacent to said switch instant.