83-2 OP-AMP --resistor circuits N 0→U2=bc 0 0 R B R i=0 i=0 N P 0 Dr=0.UA=UB D=A(U4-UB)=cons tant The inverting OP-AMP circuit. R2 KCL R RI R2 ●● 0 and i=0 R 0 01 R, R2 R
§3-2 OP-AMP --resistor circuits Ri = i N = 0 i P = 0 A cons t x A B c A B = 0 = = ( − ) = tan Ro = 0 →2 = C = = → → = → − + 0 0 0 i i R i i The inverting OP-AMPcircuit. i R R KCL x x = − + − 2 2 1 1 : x = 0 and i = 0 1 2 1 2 2 2 1 1 0 R R or R R + = = − A B − 2 = + x 0 N i P i + + − x R2 − + 2 − + 1 R1 i + + −
The non-inverting OP-AMP circuit. at node r .-b KCL +i=0 R i=0 and =v 2 R R2 (U2>U1) R Example 3-1: In the inverting and non-inverting OP-AMP circuit, gains are 10. Find Ri,r2. For the inverting circuit. R 10,2=10,f:R1=10k,then,R2=100k R, For the non-inverting circuit. 4101+2=10,j:R1=10k,hem,2=90k R1
The non-inverting OP-AMPcircuit. : 0 2 2 1 + = − + i R R KCL at node x x x 1 i = 0, and x = Example 3-1:In the inverting and non-inverting OP-AMP circuit, gains are 10. Find R1 , R2 . For the non-inverting circuit: ( ) 2 1 1 2 1 2 1 1 = + R R R2 x x − + 2 − + 1 i R1 + + − For the inverting circuit: 10, 10, : 10 , , 100 . 1 2 1 2 1 2 i f R k then R k R R = = = = 10,1 10, : 10 , , 90 . 1 2 1 2 1 2 i f R k then R k R R = + = = =
