公开(公告)号：US20140070897A1

公开(公告)日：2014-03-13

申请号：US13774163

申请日：2013-02-22

Applicant: NXP B.V.

Inventor： Johannes Hubertus Antonius BREKELMANS ,  Reinier HOOGENDOORN ,  Nenad Pavlovic

IPC: H03L5/00

CPC classification number: H03L5/00 ,  H03B5/06 ,  H03B5/12 ,  H03B5/1212 ,  H03B5/124 ,  H03B5/36 ,  H03L3/00

Abstract: An oscillator circuit (702; 802) comprising first and second resonator terminals (710, 712; 810, 812) for connecting to respective terminals of a resonator (704; 804). The oscillator circuit also comprises a first inverting amplifier (706; 806) connected between the first and second resonator terminals (710, 712; 810, 812) in a first mode of operation; and a back to back pair of second inverting amplifiers (706, 708; 806, 808) connected between the first and second resonator terminals (710, 712; 810, 812) in a second mode of operation. There is also provided a controller configured to compare an operational parameter of the oscillator circuit (702; 802) to a switchover threshold, and switch the oscillator circuit (702; 802) from the first mode of operation to the second mode of operation when the operational parameter exceeds the switchover threshold.

Abstract translation: 振荡器电路（702; 802）包括用于连接到谐振器（704,804）的相应端子的第一和第二谐振器端子（710,712; 810,812）。 振荡器电路还包括在第一操作模式下连接在第一和第二谐振器端子（710,712; 810,812）之间的第一反相放大器（706; 806） 以及在第二操作模式下连接在第一和第二谐振器端子（710,712; 810,812）之间的背靠背对的第二反相放大器（706,708,806,808）。 还提供了一种控制器，其被配置为将振荡器电路（702; 802）的操作参数与切换阈值进行比较，并且当振荡器电路（702; 802）从第一操作模式切换到第二操作模式时 操作参数超出切换阈值。