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PA simulation error in ADS

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zhaofeng1983

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When I was simulating a PA in ADS, the status window displays"solution failed for sourcelevel....."
How can I fix the problem?
 

s11_rho

Plz tell me
1) Which analysis u was performing.
2) if u r performing ac analysis then select P1 tone source and give proper power in dBm or in dB.
 

PA simulation in ADS

Harmonic balance simulation.
To simulate the PAE.
 

PA simulation in ADS

what is the source ur using ? , it is a frequency domain power source
try to increase the power level of the source and check if it will work or not

khouly
 

PA simulation in ADS

there is a lot of help and example design in ADS
why not learn step by step

their simulation method and result calcultion method is very good and easy to use.
 

Re: PA simulation in ADS

The circuit and status window message are in the attatching documents
This solution problems happens when the s11_rho increases. Does it affect the simulation result?


Added after 1 minutes:

This is the circuit
 

Re: PA simulation in ADS

And problem description
 

PA simulation in ADS

Actually, I use the simplest PA example in ADS. I only substituted the PA part with my PA translated from Spectre.
 

PA simulation in ADS

i checked the schematic of the circuit , what is the use of the controlled sources in ur schematic , they may do the problem

khouly
 

PA simulation in ADS

In ADS, how to translate single-end signal into differential signal? Then,how about differential to single?
I need to consider the load effect on both sides.

Added after 1 minutes:

I use the VCVS to ideally transform single-end signal into differential one. I have also tried transformer, but same problem still exists.
 

PA simulation in ADS

yeah , u need a balun , or VCVS can u send the schematic and i will check it

i have checked the circuit well in the left corner that source and the VCVS u use not grounded , place a ground conection
 

Re: PA simulation in ADS

This is the overall circuit. I added gnd,but still doesn't work.
 

PA simulation in ADS

i have simulated the circuit , there is a diode excede the explosion current in ur circuit , this may cause the problem

try to increase the max current paramter in it

khouly
 

PA simulation in ADS

How do u find the diode current? I didn't find that in the status window.
 

PA simulation in ADS

i didn't adjust anything , it is my normal setting , but in the HB check the status make detailed

khouly
 

PA simulation in ADS

Could you fix the problem and tell me where you have changed? Thanks a lot.
 

PA simulation in ADS

i will try , and update u

khouly
 

Re: PA simulation in ADS

--------------------------------------------------------------------------------

i checked the schematic of the circuit , what is the use of the controlled sources in ur schematic , they may do the problem

khouly

Added after 2 minutes:



--------------------------------------------------------------------------------

i checked the schematic of the circuit , what is the use of the controlled sources in ur schematic , they may do the problem

khouly
 

PA simulation in ADS

The controlled source is used to model the load effect on the PA output.
SpectreRF use this method to realize single-to-differential transformation
 

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