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Type: Posts; User: mangk

1. ## Thread: Absolute convergence criteria?

by mangk
Replies
2
Views
310

### Closed: Re: Absolute convergence criteria?

Thanks for your clear explanation, wwfeldman

It was a great help.
2. ## Thread: Absolute convergence criteria?

by mangk
Replies
2
Views
310

### Closed: Absolute convergence criteria?

Hi everyone,

I have a queation about convergence criteria, described in The Designer's Guide to Spice and Spectre (by Ken Kundert)

In the book on page 20,

It is stated that "The first...
3. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Re: Oscillator jitter transient simulatin in spectre

Anyway, as you have proposed, I will study PSS simulation after tomorrow.

I am greatly look forward to learning new simulation method.. which might be very informative.
4. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Re: Oscillator jitter transient simulatin in spectre

Please refer to the post to pancho_hideboo, that will be uploaded soon.

I think my explanation was insufficient.

Thank you.
5. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Re: Oscillator jitter transient simulatin in spectre

For some reason, since I cannot upload my script to the Internet, I will describe my goal more clearly.

* Purpose: Measuring a jitter by a power supply noise, NOT...
6. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Re: Oscillator jitter transient simulatin in spectre

pancho_hideboo,

What I meant was a transient simulation of osc whose output buffer is powered by a non-ideal power source (1 V + "noisy power").

The noise power can be 'an 1 tone sine wave' or...
7. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Re: Oscillator jitter transient simulatin in spectre

vivekroy,

OK. then, is there an useful way to distinguish 'the real jitter' and 'simulation inaccuracy' if simulation is conducted in noisy condition?

To me, the error by simulation inaccuracy...
8. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Re: Oscillator jitter transient simulatin in spectre

vivekroy,

Yes I think so too.

However, in some simulations (when more complex circuits are included; some logic gates, op-amps, and so on) the jitter was simulated to tens of pico seconds.
...
9. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Re: Oscillator jitter transient simulatin in spectre

Thank you for your advice, but unfortunately, I don't have a known test bench.

The purpose of this simulation is to set a reliable jitter test environment.

Just 'conservative' setting of...
10. ## Thread: Oscillator jitter transient simulatin in spectre

by mangk
Replies
16
Views
849

### Closed: Oscillator jitter transient simulation in spectre (Jitter varies each time)

Hi,

I am currently designing an ring oscillator of 100-200 MHz frequency, and have to measure the absolute jitter using transient simulation.

The schematic consists of a 5 stage ring oscillator...
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