Patent ID: 8314634
Filing Date: 2012-11-20
Classification: H03K

Abstract:
1. A method of operating a device, the method comprising: providing power to operate a signal source of the device during a normal operation mode of the device; passing an output signal from the signal source through a signal path to an output node during the normal operation mode; receiving an operation mode signal to switch the device from the normal operation mode to a low power operation mode; disabling the signal path to prevent glitches from appearing at the output node during the switch from the normal operation mode to the low power operation mode; continuing providing power to the signal source until after the signal path is disabled; interrupting power to disable the signal source during the low power operation mode; receiving the operation mode signal to switch the device back from the low power operation mode to the normal operation mode; providing power to operate the signal source in response to the operation mode signal; continuing disabling the signal path until after the signal source begins operating to prevent glitches from appearing at the output node during the switch from the low power operation mode to the normal operation mode; and enabling the signal path when the device returns to the normal operation mode.