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how to simulation the switch cap circuit

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poweric

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switch cap circuits

i want to know how to simulation the switch cap circuit while using Hspice
becasuse the CLK signal is the .tran (pulse)
i want to get the freq response of the VOUT vs VIN
thank you for help
 

switchcap cadence simulation

It are two state when the switch on and off.
you can do frequency response analyse two times. one at on state and one at off state.
 

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    poweric

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switch cap circuit simulation

MOS Pair or just NMOS?
 

switch cap simulator

the swithch is NMOS



Added after 3 minutes:

jerryzhao said:
It are two state when the switch on and off.
you can do frequency response analyse two times. one at on state and one at off state.
Click to expand...
while i get the apart results
how do i get the totle resluts
can you give more detail?
 

switch cap simulation

The totle result is you analyse two part.
The two state are two circuits. analyse the 2 state's bandwith and gain etc.
The total result that in your mean only get in .tran simulate in normal sc circuit(only for sample and hold). If you are designing SC-filter, you must do Z transfer, and use matlab do frequency analyse.
 
if u make your simulation in spectre of cadence, u can choose PSS+PAC to simulate the frequency response of SC circuits
hope it helps
 

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    poweric

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You could use Simplis.

B/R

ynhe
 

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    poweric

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ynhe said:
You could use Simplis.

B/R

ynhe
Click to expand...
what is
the "simplis " B/R
is it a tool for this ? can you explain more detail thank you
 

Hi:
SIMPLIS (SIMulation for Piecewise-LInear System) is a computer software package specifically designed for the simulation and analysis of switching power supplies.
SIMPLIS has a small-signal frequency-domain analyzer specifically designed for
the analysis of switching piecewise-linear systems. The analysis is based on the timedomain simulation of the switching piecewise-linear systems without having to resort to any circuit averaging or derivation of equivalent non-switching models.

see http://www.catena.uk.com for details.

ynhe
 

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