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[互助]求助~~~~~~

UID ：19432

注册：2008-10-17
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0楼发表于: 2009-05-19 01:11:49

我是ADS新手~~~~
現在在用ADS模擬 VCO時~~~
跑HARMONIC BALANCE 模擬時~~~
出現以下錯誤訊息~~~

Warning detected by hpeesofsim during DC analysis `HB1'.
    Matrix is singular (detected at node or branch `_net703').
Warning detected by hpeesofsim during DC analysis `HB1'.
    Circuit converged after a virtual resistance of 1 TOhms
    was added between each node and ground.
    Possible causes include floating nodes or missing ground.
Warning detected by hpeesofsim in frequency search during HB analysis `HB1'.
    Circuit is stable. Found loop gain > 1 but Nyquist criteria for
    oscillations not satisfied. This means that the loopgain point 1+j0
    was encircled in a counter clockwise direction. It must be encircled
    in a clockwise direction to satisfy the Nyquist criteria.
    Will try fixed frequency amplitude search.
Warning detected by hpeesofsim during HB analysis `HB1'.
    Oscillator analysis did not converge. Setting solution to zero.
Warning detected by hpeesofsim during HB analysis `HB1'.
     More than one mixing term has landed on frequency 0 Hz.
Error detected by hpeesofsim during SP analysis `SP1'.
    Port or Term number 1 ..

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离线可爱多999

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1楼发表于: 2011-07-11 10:23:01

不知楼主如何解决这个问题的啊？

离线jinking

UID ：26114

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2楼发表于: 2011-07-18 18:21:23

最后一个Error是Term的Num被改动，Num=1

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