Home › GATE ECE › Electronics & Communication › GATE ECE — Core › For non-inverting amplifier (input to + terminal…
For non-inverting amplifier (input to + terminal, R_in & R_f resistor divider): gain:
A-R_f/R_in
B1 + R_f/R_in (always > 1, no inversion)
CJust R_f
DR_in/R_f
Answer & Solution
Correct answer: B. 1 + R_f/R_in (always > 1, no inversion)
Non-inverting: V- = V+ = V_in. R_in & R_f divider sets V- = V_out × R_in/(R_in+R_f). Equate: V_out = V_in (1 + R_f/R_in). Gain ≥ 1. Buffer (voltage follower): R_in = ∞, R_f = 0, gain = 1.
Related questions
For n-bit ADC with full-scale V_FS, resolution (LSB) is:Cutoff frequency of RC low-pass filter:Wave equation in vacuum (Maxwell):VSWR (Voltage Standing Wave Ratio) for matched load (R_L = Z_0):Characteristic impedance of a lossless transmission line:Shannon channel capacity:FM (frequency modulation) varies:In AM (amplitude modulation), modulating signal varies: