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thnaks for your advice , it is true that i am a begginer,i also see the enhancement , i will go on ;i just posted the first stage of an amp . i can easily get the bias "v9 N3 vss 3" , i think the other transistor suply a voltage rather than copy the current as the ransistor can be different...
It costs to use Cadence,thanks a lot for your reply.during the time, I did much simulation,and got a much better result,the CMRR is 81dB,and 3dB frequence is about 3Mhz ,here is the spice file.we can have more discuse on this topic.
Added after 52 seconds:
* SPICE netlist written by S-Edit...
mcnc 1.25um cmos parameters
Here is the t-spice file I just simulated,it is about a differencial amp.please help me check the file,or adjust the paramenter,thanks a lot!
* SPICE netlist written by S-Edit Win32 8.10
* Written on May 29, 2005 at 22:32:21
.include...
min w 1.2u cmos
I am a university student from China.
I am doing some design of cmos analog opamp using TANNER EDA,and was confused by the W/L;I am using orbtn12/orbtp12 tech.
i appreciate your help that you could send me a finished design of a simple design,
t-spice file,layout even better...
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