PSS仿真中使用shooting和harmonic balance方法的区别

slq402

我是想进行DCO频率响应的仿真，使用PSS+PSTB仿真，但是使用shooting和harmonic balance方法的结果差异很大，请问各位知道这两种方法都适用于什么情况吗？忘各路大神不吝赐教~ PSTB设置 pss设置 HB LOOP GAIN shooting LOOP GAIN

slq402

走过路过的大神~求指点~

tf001

一个是基于时域分析，一个是基于频域分析，可以看下这个帖子
http://bbs.eetop.cn/thread-556267-1-1.html

shuijing12

回复 3# tf001


    谢谢

chenxiaoming

xuexile

赵日新

围观学习

kjdxll

围观学习

远上寒杉

参考：Tip of the Week: When should I use the pss/qpss Harmonic Balance vs. Shooting Newton Engine? (https://community.cadence.com/ca ... oting-newton-engine)

Use harmonic balance for:
    High dynamic range, weakly-nonlinear systems
        RF front-ends (LNA, Mixer)
        IQ modulators
    Mildly nonlinear oscillators with resonators, such as
        LC oscillators
        Crystal oscillators
        Negative-gain oscillators
    Circuits with distributed components
        Transmission lines
        S-parameter models

Use shooting Newton for:
    Circuits where input signals have sharp transitions
    Strongly nonlinear circuits
        Frequency dividers
        Strongly-nonlinear resonatorless oscillators, such as
            Ring oscillators,
            Relaxation oscillators,
            Oscillators containing digital control components,
            Oscillators with dividers.

简而言之就是偏线性、正弦的用HB，偏logic、方波的用shooting。

shaohaijun

远上寒杉 发表于 2020-8-22 11:24
参考：Tip of the Week: When should I use the pss/qpss Harmonic Balance vs. Shooting Newton Engine? ( ...

请教一下，电路里面有frequency divider by 2, 也有s parameter model, 该用pss harmonic balance 还是shooting呢

远上寒杉

shaohaijun 发表于 2020-12-17 15:42
请教一下，电路里面有frequency divider by 2, 也有s parameter model, 该用pss harmonic balance 还是sh ...

shooting的特点是收敛性好，hb的特点是快，所以不适合用hb的时候就用shooting吧。