Lsi Logic Corporation

Michael R Hede

Stephen M Johnson

Jeffrey M Rogers

A method and apparatus for switching clocks comprising a first circuit, a second circuit, and a third circuit. The first circuit may be configured to generate (i) a first signal in response to a select signal and a first clock signal, (ii) a second signal in response to said first signal and a second clock signal, (iii) a third signal in response to said select signal and said second clock signal, and (iv) a fourth signal in response to said third signal and said first clock signal. The second circuit may be configured to generate a first enable signal and a second enable signal in response to (i) said first signal, (ii) said second signal, (iii) said third signal, and (iv) said fourth signal. The third circuit may be configured to select (i) one or more first input signals, (ii) one or more second input signals, or (iii) a predetermined logic level as one or more output signals in response to said first enable signal and said second enable signal.

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Colorado Springs, CO, United States of America

Michael R Hede