求助，怎么让振荡器，电荷泵，运放这三个模块进行联合AC仿真？

冬婺指

就是振荡器驱动电荷泵，在一定时间稳定（比如1ms），再使电荷泵的输出供给运放作为电源电压，再仿真运放的AC，就是先tran仿真一定时间再进行AC仿真，这种仿真操作怎么设置啊？求大佬们教教我

Twonej

设置initial state？没整过这种玩法orz

andyjackcao

在Tran设置的option里有一个

------需要设置ac的类型和ac开始验证的时间点

andyjackcao

Twonej 发表于 2022-5-29 10:56
设置initial state？没整过这种玩法orz

ADE里有个收敛设置的选项 ---> initial condition

冬婺指

andyjackcao 发表于 2022-5-29 11:11
ADE里有个收敛设置的选项 ---> initial condition

大佬，里面原始条件只有设置节点电压啊？

sea11038

pss+pac/pstb仿真不行么？

david_reg

you can refer to "Spectre Circuit Simulator and Accelerated Parallel Simulator User Guide"

Performing Small-Signal Analyses during a Transient Analysis
You can perform an AC and/or noise analysis at specific times during a transient analysis. The
Spectre circuit simulator stops the transient analysis at the specified times, saves operating
point information, and performs the AC and/or noise analysis.
This type of simulation is useful when you want to run an AC analysis after getting past
specific start-up behavior, or when there is more than one point along the transient run that
can be thought of as steady-state.
The syntax for performing a small-signal analysis during transient analysis is:
Name tran stop=stop actimes=time acnames=name
Where:

Name The name of the transient analysis
stop The time at which the transient analysis is to be put on hold.
actimes The time points at which the analyses specified by acnames are
performed.
acnames The names of the analyses to be performed at each time point in the
actimes array. Allowed child analyses are: ac, noise, sp, stb, or
xf.