operational amplifer voltage gain is 60dB R11kohm R2 99kohm

operational amplifer voltage gain is 60dB, R1=1kohm, R2= 99kohm.

if we want Vout/vin=100, which resistor we should connect parallel in R1?

Solution

for non-inverting opamp

V_out/V_in = (1+R_f/R₁)

to make V_out/V_in = 100

resistor 1.5Kohm should be connected parallel for R_f = 99kohms