Project 1 Test Bench Circuit Put your circuit in a file name circuit sp with the following structure param VIC the midpoint of your common mode range subckt amplifier inp inn out vddp vddn your circuit ends You can change the names of the inp inn out vddp and vddn nodes in the subcircuit statement to match the names you choose but not their order Your circuit is not supposed to have any independent sources only transistors and resistors The supply is provided to you through the vddp and vddn connections positive and negative supply respectively inp and inn are the positive and negative input respectively out is the output Make sure the sign of the output is right inp is the positive input inn is the negative input switching the input nodes will fix the sign Some of the test bench rely on feedback to get the result and they will fail if you inverse the sign of you amplifier You will have to submit this file through email More detail in project 1 submit guideline Tests 1 Operating point and differential mode gain for VIC midpoint Purpose check specs for Adm Psupply VDsat Vout 0 for VID 0 2 Operating point and differential mode gain for VIC midpoint 0 2 V Purpose check common mode range Adm must meet specs for maximum common mode input 3 Operating point and differential mode gain for VIC midpoint 0 2 V Purpose check common mode range Adm must meet specs for minimum common mode input 4 Operating point and differential mode gain for VDD 1 2 1 1 V and VIC midpoint Purpose check gain variation with supply variation Adm must meet specs 5 Operating point and differential mode gain for VDD 1 2 0 9 V and VIC midpoint Purpose check gain variation with supply variation Adm must meet specs 6 Common mode gain for midpoint Purpose check Acm 7 AC analysis differential mode gain at 1 Hz for Vout 0 V 8 AC analysis differential mode gain at 1 Hz for Vout 0 4 V Purpose check output range Adm must meet specs 9 AC analysis differential mode gain at 1 Hz for Vout 0 4 V Purpose check output range Adm must meet specs Tests 7 9 use a simple feedback network to set the output voltage An AC analysis at low frequency is used instead of a TF analysis because the feedback network is active for DC analyses include OP TF but not for AC analyses Test benches testbench1 sp runs tests 1 6 testbench2 sp runs tests 7 9 Usage put testbench1 sp testbench2 sp models sp circuit sp in the same directory and run hspice testbench1 o testbench1 hspice testbench2 o testbench2 and check the results
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