Apr 14, 2012 #1 E ECE101 Newbie level 5 Joined Nov 25, 2011 Messages 8 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,342 1: Vout = Vin.R2 / R2 + R1 2: (R2 + R1). Vout = Vin. R2 3: (-R2. Vin + R2) + R1. V out = 0 4: R2(-Vn +1) + R1.Vout = 0 5: R2 = (R1.Vout) / (Vin + 1) How does one go from line 2, to line 3? I end up with: 2: (R2 + R1). Vout = Vin. R2 3: (-R2. Vin) + R2. Vout + R1. Vout = 0 Could someone please explain?
1: Vout = Vin.R2 / R2 + R1 2: (R2 + R1). Vout = Vin. R2 3: (-R2. Vin + R2) + R1. V out = 0 4: R2(-Vn +1) + R1.Vout = 0 5: R2 = (R1.Vout) / (Vin + 1) How does one go from line 2, to line 3? I end up with: 2: (R2 + R1). Vout = Vin. R2 3: (-R2. Vin) + R2. Vout + R1. Vout = 0 Could someone please explain?
Apr 14, 2012 #2 keith1200rs Super Moderator Staff member Joined Oct 9, 2009 Messages 10,865 Helped 2,065 Reputation 4,130 Reaction score 1,597 Trophy points 1,403 Location Yorkshire, UK Activity points 57,270 ECE101 said: How does one go from line 2, to line 3? Click to expand... By accidentally missing off the Vout from R2? It would be easier to follow with the schematic. Keith
ECE101 said: How does one go from line 2, to line 3? Click to expand... By accidentally missing off the Vout from R2? It would be easier to follow with the schematic. Keith
Apr 14, 2012 #3 _Eduardo_ Full Member level 5 Joined Aug 31, 2009 Messages 295 Helped 118 Reputation 238 Reaction score 103 Trophy points 1,323 Location Argentina Activity points 2,909 1: Vout = Vin.R2 / R2 + R1 must be Vout = Vin.R2 /(R2 + R1) 2: (R2 + R1). Vout = Vin. R2 OK 3: (-R2. Vin + R2) + R1. Vout = 0 must be (-R2.Vin + R2.Vout) + R1.Vout = 0 4: R2(-Vn +1) + R1.Vout = 0 5: R2 = (R1.Vout) / (Vin + 1) error propagation. If you need R2 by KCL (Vin - Vout)/R1 = Vout/R2 then R2 = R1.Vout/(Vin - Vout)
1: Vout = Vin.R2 / R2 + R1 must be Vout = Vin.R2 /(R2 + R1) 2: (R2 + R1). Vout = Vin. R2 OK 3: (-R2. Vin + R2) + R1. Vout = 0 must be (-R2.Vin + R2.Vout) + R1.Vout = 0 4: R2(-Vn +1) + R1.Vout = 0 5: R2 = (R1.Vout) / (Vin + 1) error propagation. If you need R2 by KCL (Vin - Vout)/R1 = Vout/R2 then R2 = R1.Vout/(Vin - Vout)