Ideal infinite gain

Tags

• amplificadores
• Amplifiers and op-amps
• Electronics
• physics
• Electronics formula
• physics formula
• Op-amp

Detail

Variables

• $v_+,v_-,v_o,v_{\mathrm{in}}$V
• $A$gain (dimensionless)
• $R_f,R_{\mathrm{in}},R_g$Ω
• $\mathrm{CMRR}$dimensionless.

Conditions

• Ideal op-amp with negative feedback except comparator; |Vo| < Vsat.

Conventions

• V or dimensionless

Related formulas

• Related

  Open-loop equation

  $$v_o=A(v_+-v_-)$$
  Open formulaOpen in section

• Related

  Virtual short

  $$v_+\approx v_-$$
  Open formulaOpen in section

• Related

  Voltage divider

  $$V_o=V_i\frac{R_2}{R_1+R_2}$$
  Open formulaOpen in section

• Related

  Superposition principle

  $$x=\sum_k x_k$$
  Open formulaOpen in section