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Composite Amplifier Stability Analysis First Scheme & Second Scheme. Tim Green, MGTS Precision Linear Analog Applications August 7, 2014. First Scheme - Loop Gain Op Amp U1. Run DC Operating Point first to be sure all op amp inputs and outputs are in the linear region of operation.
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Composite Amplifier Stability AnalysisFirst Scheme & Second Scheme Tim Green, MGTS Precision Linear Analog Applications August 7, 2014
First Scheme - Loop Gain Op Amp U1 Run DC Operating Point first to be sure all op amp inputs and outputs are in the linear region of operation. Otherwise AC Analysis is not valid if op amp outputs are saturated or common mode inputs violated.
First Scheme - Loop Gain Op Amp U1 Loop Gain Phase Margin = 68.9deg
First Scheme - Loop Gain Op Amp U2 Run DC Operating Point first to be sure all op amp inputs and outputs are in the linear region of operation. Otherwise AC Analysis is not valid if op amp outputs are saturated or common mode inputs violated.
First Scheme - Loop Gain Op Amp U2 Loop Gain Phase Margin = 77.1deg
First Scheme - Loop Gain Op Amp U2 Loop Gain Phase Margin = 77.1deg
Second Scheme - Loop Gain Op Amp U1 Run DC Operating Point first to be sure all op amp inputs and outputs are in the linear region of operation. Otherwise AC Analysis is not valid if op amp outputs are saturated or common mode inputs violated.
Second Scheme - Loop Gain Op Amp U1 Loop Gain Phase Margin = 69.9deg
Second Scheme - Loop Gain Op Amp U2 Run DC Operating Point first to be sure all op amp inputs and outputs are in the linear region of operation. Otherwise AC Analysis is not valid if op amp outputs are saturated or common mode inputs violated.
Second Scheme - Loop Gain Op Amp U2 Loop Gain Phase Margin = 62.5deg
All Embedded Schematics in this presentation can be run in the Free TINA_TI SPICE simulator available at: http://www.ti.com/tool/tina-ti