This is stated as series series type of negative feedback but why.

Whereas this one is series shunt topology enter image description here

  • \$\begingroup\$ The 1st has the output load in series with R to provide current limit but does not share ground return like the shunt output.. The 1st is a also voltage to current converter dependant on load R \$\endgroup\$ Mar 1, 2019 at 1:57
  • \$\begingroup\$ If i guess what you mean to say is if current through load resistance is considered zero then feedback voltage is observed ,is it that you meant. \$\endgroup\$ Mar 1, 2019 at 2:12
  • \$\begingroup\$ No the OA input current is always assumed zero with 0Vdiff, so the current flows only thru the resistor paths from source and output \$\endgroup\$ Mar 1, 2019 at 2:18
  • \$\begingroup\$ Yes input current has to be zero but load current can occur due to output voltage.Is the current through load what you considered / made zero to find the type of sampling in the above circuits. \$\endgroup\$ Mar 1, 2019 at 2:21
  • \$\begingroup\$ yes the 1st uses series current source Vin/R thru RL to achieve gain 1+ RL/R while second uses shunt voltage source with same gain 1+R2/R1 independent of RL \$\endgroup\$ Mar 1, 2019 at 2:28


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