Patent ID: 8704559
Filing Date: 2014-04-22
Classification: H03K,H03L

Abstract:
1. A method for synchronizing the phase of a local-oscillator (LO) signal path, the signal path including a plurality of frequency divider circuits and a local-oscillator (LO) buffer for receiving a LO signal coupled to the plurality of frequency divider circuits; the method comprising: adding an offset voltage and setting a predetermined state to each of the plurality of frequency divider circuits prior to enabling the plurality of frequency divider circuits; enabling the plurality of frequency divider circuits; enabling the LO buffer to provide the LO signal to the plurality of frequency divider circuits after the plurality of frequency divider circuits have been enabled, wherein when the LO signal drives each of the plurality of frequency divider circuits, each of the plurality of frequency divider circuits starts a frequency division operation; and removing the offset voltage from each of the plurality of frequency divider circuits to allow the plurality of frequency divider circuits to effectively drive other circuits.