公开(公告)号：BRPI0816681A2

公开(公告)日：2015-03-17

申请号：BRPI0816681

申请日：2008-09-11

Applicant: QUALCOMM INC

Inventor： KIM HONG SUN ,  KIM JIN WOOK ,  ZHANG GANG ,  DUNWORTH JEREMY DARREN ,  PALS TIMOTHY PAUL

IPC: H03L7/107 ,  H03L7/193 ,  H03L7/197

公开(公告)号：CA2698268A1

公开(公告)日：2009-03-19

申请号：CA2698268

申请日：2008-09-11

Applicant: QUALCOMM INC

Inventor： KIM HONG SUN ,  KIM JIN WOOK ,  ZHANG GANG ,  DUNWORTH JEREMY DARREN ,  PALS TIMOTHY PAUL

IPC: H03L7/107 ,  H03L7/193 ,  H03L7/197

Abstract: Techniques for generating oscillator signals in a wireless communication device are described. A phase-locked loop (PLL) may be used to generate an oscillator signal for a selected frequency channel. Different PLL settings may be used for the blocks in the PLL for different frequency channels. The different PLL settings may be for different PLL loop bandwidths, different amounts of charge pump current, different frequency equations associated with different sets of high and low divider ratios, different frequency division schemes associated with different prescaler ratios and/or different integer divider ratios, high side or low side injection for a super-heterodyne receiver or transmitter, and/or different supply voltages for one or more circuit blocks such as an oscillator. A suitable set of PLL settings may be selected for each frequency channel such that adverse impact due to spurs can be mitigated.