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circuit_design:uebung_3.5.2 [2021/11/11 19:28] – slinncircuit_design:uebung_3.5.2 [2023/06/26 14:04] (aktuell) – mexleadmin
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 Below you will find circuits with an ideal operational amplifier, which are similar to the non-inverting amplifier and whose voltage gain $A_V$ must be determined. Below you will find circuits with an ideal operational amplifier, which are similar to the non-inverting amplifier and whose voltage gain $A_V$ must be determined.
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    * $R_1 = R_3 = R_4 = R$    * $R_1 = R_3 = R_4 = R$
   * $R_2 = 2 \cdot R$   * $R_2 = 2 \cdot R$
-  * $U_I$ comes from a low-resistance source +  * $U_\rm I$ comes from a low-resistance source 
-  * $U_O$ is due to a high-resistance consumer+  * $U_\rm O$ is due to a high-resistance consumer
  
 __Exercises__ __Exercises__
  
-  - Enter the voltage gain $A_V$ for each circuit. A detailed calculation as before is not necessary.+  - Enter the voltage gain $A_\rm V$ for each circuit. A detailed calculation as before is not necessary.
   - For Figure 7, indicate how the voltage gain can be determined.   - For Figure 7, indicate how the voltage gain can be determined.
-  - Generalize with justification how +  - Generalize with the following justifications: 
-      - a short circuit of the two OPV inputs must be taken into account, +      - How has a short circuit of the two OPV inputs must be taken into account? 
-      - Resistances are to be considered when doing this: +      - How do resistances have to be considered in the following cases: 
-        - with a terminal ("on one side") are directly and exclusively on an OPV input, +        - with one terminal (so "one connector") directly and exclusively on an OPV input, 
-        - with one terminal each are directly connected to an OPV input.+        - with both terminals each directly connected to an OPV input.
   - In which circuits do resistors $R_3$ and $R_4$ represent an unloaded voltage divider?   - In which circuits do resistors $R_3$ and $R_4$ represent an unloaded voltage divider?
  
-In order to approach the problems, you should try to use the knowledge from the inverting amplifier. It can be useful to simulate the circuits via [[http://www.falstad.com/circuit/|Falstad-Circuit]] or Tina TI. In the first two circuits, tips can be seen under the illustration as support. \\+To approach the problems, you should try to use the knowledge from the inverting amplifier. It can be useful to simulate the circuits via [[http://www.falstad.com/circuit/|Falstad-Circuit]] or Tina TI. In the first two circuits, tips can be seen under the illustration as support. \\
  \\  \\
-**__Important__**  : As always in your studies, you should try to generalize the knowledge gained from the task.+**__Important__**: As always in your studies, you should try to generalize the knowledge gained from the task.
  
 <WRAP onlyprint> **Tipps** <WRAP onlyprint> **Tipps**
  
   * How big is the current flow into the inverting and non-inverting input of an ideal operational amplifier? So what voltage drop would there be across a resistor whose one connection only leads to one input of the operational amplifier ($R_3$)?   * How big is the current flow into the inverting and non-inverting input of an ideal operational amplifier? So what voltage drop would there be across a resistor whose one connection only leads to one input of the operational amplifier ($R_3$)?
-  * The operational amplifier always tries to output as much current at the output that the required minimum voltage $U_D$ results between the inverting and non-inverting input. How high can $U_D$ be assumed? Can this voltage also be built up via a resistor ($R_4$)?+  * The operational amplifier always tries to output as much current at the output that the required minimum voltage $U_\rm D$ results between the inverting and non-inverting input. How high can $U_\rm D$ be assumed? Can this voltage also be built up via a resistor ($R_4$)?
   * Can different resistors (e.g. because they are between the same nodes) be combined?   * Can different resistors (e.g. because they are between the same nodes) be combined?
  
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-++++ Tipps|+++++ Hints|
  
-  * Wie groß ist der Stromfluss in den invertierenden und nicht invertierenden Eingang bei einem idealen Operationsverstärker? Welchen Spannungsabfall würde es also an einem Widerstand geben, dessen einer Anschluss nur zu einem Eingang des Operationsverstärkers führt ($R_3$)? +  * How high is the current flow into the inverting and non-inverting input of an ideal operational amplifier? What voltage drop would there be across a resistor whose one connection only leads to one input of the operational amplifier? ($R_3$)? 
-  * Der Operationsverstärker versucht stets soviel Strom am Ausgang auszugeben, damit sich zwischen invertierendem und nicht invertierendem Eingang die benötigte minimale Spannung $U_D$ ergibt. Wie groß kann $U_D$ angenommen werden? Kann diese Spannung auch über einen Widerstand ($R_4$) aufgebaut werden?+  * The operational amplifier always tries to output enough current at the output so that the required minimum voltage is between the inverting and non-inverting input $U_\rm D$ results. How big can $U_\rm D$ be accepted? Can this voltage also via a resistor ($R_4$) being constructed?
  
 ++++ ++++
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-++++ Tipps|+++++ Hints|
  
-  * Wieviel Strom muss über $R_4 = R$ fließen, damit sich die erwartete Spannung $U_4$ ergibt? +  * How much current must flow through $R_4 = R$ so that the expected voltage $U_4$ results? 
-  * Wieviel Strom muss entsprechend über $R_2 = 2 \cdot R$ fließen? +  * How much current must flow through $R_2 = 2 \cdot R$ fließen? 
-  * Wieviel Strom fließt also durch $R_1 = R$? welche Spannung ergibt sich also an $R_1$?+  * How much current must flow through $R_1 = R$? How high is the voltage at $R_1$?
  
 ++++ ++++
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