crystal oscillator simulation problem ..

elec_888 · 发表于 2014-5-30 23:22:35

马上注册，结交更多好友，享用更多功能，让你轻松玩转社区。

您需要登录才可以下载或查看，没有账号？注册

x

hello everybody im doing a crystal oscillator and simulating it using cadence ic6
my problem is when i use moderate transient accuracy the results show oscillation .. but when i use conservative transient simulation there is absolutely no oscillation in the results ! and no matter what the transient step is !! how can is solve this problem ?
thanks a lot

ralphtw · 发表于 2014-11-25 10:33:46

who know it ?!

specialest · 发表于 2014-12-2 23:56:55

本帖最后由 specialest 于 2014-12-3 00:07 编辑

Maybe it doesn't oscillate.

r u using transient analysis? just try to give a initial current condition in inductance of the motional arm, and increase Cm (to decrease Q, thus the start up time will decrease.) make sure you gm is about 2~3X larger than calculated gmcrit. and give it a long time transient. hundreds of usecond. and the maxstep also matters. set it to period/100 or less. then try it again.

you also should try PSS with shooting engin and oscic=linear (refer to the spectreRF user guide ). if it converges, check the one period waveform. that will be the stable waveform.

caltech_usa · 发表于 2018-7-30 14:55:28

回复 1# elec_888

谢谢谢谢

[解决] crystal oscillator simulation problem ..

马上注册，结交更多好友，享用更多功能，让你轻松玩转社区。

相关帖子

站长推荐 /2



EETOP诚邀模拟IC相关培训讲师	创芯人才网--重磅上线啦！