关于注入锁定振荡器的PSS仿真

zhhcguoxu

JoyShockley 发表于 2018-4-12 16:56
回复 4# 朱思遥

Thans for your share

amplifier_bias

放糖哦哦哦

注入锁定是driven电路，不能勾选oscillators,我把这个选项勾选就可以跑PSS，但是偏置的电流太大会出现不收敛的问题

baymax816

Here is the article:
When simulating an injection locked oscillator and looking at the startup waveform, you are looking for the point where the timing of the oscillator output is stable with reference to the injection source. Note that the amplitude must be at steady-state as well.

When you set up your PSS analysis you:

- Do NOT select the oscillator button.
You are applying a signal (vsource) to your ring oscillator which causes the oscillator to oscillate at the injection frequency. Thus it is a driven circuit - as it is driven by the injection source. This is why you don't push the oscillator button on the PSS choosing analysis form. SpectreRF considers this a driven circuit and will error out if you select the oscillator button on the PSS choosing analyses form.

- Set tstab to 100 periods.
You want the circuit to be stabilized, i.e. you need to get it close enough to the final oscillation frequency so that PSS can converge. This will depend on the time constant of the circuit. A high Q oscillator will take a long time to settle. A ring oscillator is lower Q by definition, so it should not be as problematic.

- Check the saveinit button.
The waveforms for the initial transient before steady state are saved and you can view them with the results browser.

- You may even want to try to run the circuit using transient analysis.
Look at the oscillator output compared to the injection source. Look for variations in the timing of the oscillator output compared to the locking source. Hopefully, the circuit will settle fairly quickly.

Now, once you can get PSS to successfully converge, you can look at things like pnoise jitter

baymax816

When simulating an injection locked oscillator and looking at the startup waveform, you are looking for the point where the timing of the oscillator output is stable with reference to the injection source. Note that the amplitude must be at steady-state as well.

When you set up your PSS analysis you:

- Do NOT select the oscillator button.

You are applying a signal (vsource) to your ring oscillator which causes the oscillator to oscillate at the injection frequency. Thus it is a driven circuit - as it is driven by the injection source. This is why you don't push the oscillator button on the PSS choosing analysis form. SpectreRF considers this a driven circuit and will error out if you select the oscillator button on the PSS choosing analyses form.

- Set tstab to 100 periods.

You want the circuit to be stabilized, i.e. you need to get it close enough to the final oscillation frequency so that PSS can converge. This will depend on the time constant of the circuit. A high Q oscillator will take a long time to settle. A ring oscillator is lower Q by definition, so it should not be as problematic.

- Check the saveinit button.

The waveforms for the initial transient before steady state are saved and you can view them with the results browser.

- You may even want to try to run the circuit using transient analysis.

Look at the oscillator output compared to the injection source. Look for variations in the timing of the oscillator output compared to the locking source. Hopefully, the circuit will settle fairly quickly.

Now, once you can get PSS to successfully converge, you can look at things like pnoise jitter

ICreader

请问楼主解决了吗？

stm2010

有后续吗

cascodeYYDS

JoyShockley 发表于 2018-4-12 05:43
回复 1# 朱思遥

前辈你好，这种提取tran过零点的方式有教程吗，没有找到相关资料

hcx_jynhcgd

感谢分享

mxm15336070789

楼主你这个问题最后解决没