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Frank Nitsche
Guest
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 Posted:
Thu Aug 19, 2004 3:19 pm Post subject:
noise analysis of a time discrete system (SC-amplifier) |
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Hello everybody,
how can I do a noise analysis of a switched capacitor amplifier? With
spectre I can make a noise analysis based of an AC analysis. But a
SC-amplifier (or also SC-filter) is a time discrete system and so I can
only make a transient analysis.
We have to verify a switched capacitor amplifier in comparison to a
normal analogue amplifier with the same gain regarding the noise.
The SC-Amplifier has much more noise at the measurement (output is
filtered by a low pass filter).
Is it possible to simulate the noise behaviour of a time discrete system
by cadence tools?
--
Best regards
Frank Nitsche
to answer by email remove NOSPAM from address
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Andrew Beckett
Guest
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| Posted:
Thu Aug 19, 2004 8:50 pm Post subject:
Re: noise analysis of a time discrete system (SC-amplifier) |
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Use SpectreRF. It's excellent for Switch Capacitor circuits.
See http://www.designers-guide.com/Analysis/sc-filters.pdf for more
details.
Andrew.
On Thu, 19 Aug 2004 13:19:42 +0200, Frank Nitsche <Nitsche.Frank@NOSPAMweb.de>
wrote:
| Quote: | Hello everybody,
how can I do a noise analysis of a switched capacitor amplifier? With
spectre I can make a noise analysis based of an AC analysis. But a
SC-amplifier (or also SC-filter) is a time discrete system and so I can
only make a transient analysis.
We have to verify a switched capacitor amplifier in comparison to a
normal analogue amplifier with the same gain regarding the noise.
The SC-Amplifier has much more noise at the measurement (output is
filtered by a low pass filter).
Is it possible to simulate the noise behaviour of a time discrete system
by cadence tools?
|
--
Andrew Beckett
Senior Technical Leader
Custom IC Solutions
Cadence Design Systems Ltd |
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Frank Nitsche
Guest
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| Posted:
Fri Aug 20, 2004 11:00 am Post subject:
Re: noise analysis of a time discrete system (SC-amplifier) |
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Thanks Andrew. So we've to buy the "Artist Statistics License" - right?
Frank.
Andrew Beckett schrieb:
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Andrew Beckett
Guest
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| Posted:
Fri Aug 20, 2004 5:02 pm Post subject:
Re: noise analysis of a time discrete system (SC-amplifier) |
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Frank,
No, you don't need the Artist Statistics License to simulate using SpectreRF.
You do need the SpectreRF license though...
Artist Statistics (aka EDFM) is for Monte Carlo, Corners and Optimiser.
Andrew.
On Fri, 20 Aug 2004 09:00:06 +0200, Frank Nitsche <Nitsche.Frank@NOSPAMweb.de>
wrote:
--
Andrew Beckett
Senior Technical Leader
Custom IC Solutions
Cadence Design Systems Ltd |
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