T Tiger555 New Member Feb 28, 2011 #1 Hi, I need to take summing up O/P from an op amp, but i am getting in -ve, how to make it +ve voltage? Thanks.
Hi, I need to take summing up O/P from an op amp, but i am getting in -ve, how to make it +ve voltage? Thanks.
Nigel Goodwin Super Moderator Most Helpful Member Feb 28, 2011 #2 Add another opamp as an inverter after it.
T Tiger555 New Member Feb 28, 2011 #3 Hi, I when i tried that, i got +15v as output. not the exact +ve. that is , if the input -5v and i need output +5v ?? Plz see the link below.. Circuit Simulator Applet (cut n paste) Nigel Goodwin said: Add another opamp as an inverter after it. Click to expand...
Hi, I when i tried that, i got +15v as output. not the exact +ve. that is , if the input -5v and i need output +5v ?? Plz see the link below.. Circuit Simulator Applet (cut n paste) Nigel Goodwin said: Add another opamp as an inverter after it. Click to expand...
Nigel Goodwin Super Moderator Most Helpful Member Feb 28, 2011 #4 Tiger555 said: Hi, I when i tried that, i got +15v as output. not the exact +ve. that is , if the input -5v and i need output +5v ?? Plz see the link below.. Circuit Simulator Applet (cut n paste) Click to expand... You're missing the input resistor, equal resistors, gain of -1.
Tiger555 said: Hi, I when i tried that, i got +15v as output. not the exact +ve. that is , if the input -5v and i need output +5v ?? Plz see the link below.. Circuit Simulator Applet (cut n paste) Click to expand... You're missing the input resistor, equal resistors, gain of -1.
T Tiger555 New Member Feb 28, 2011 #5 Thanks alot! Got the idea to solve it. Cheers!! Nigel Goodwin said: You're missing the input resistor, equal resistors, gain of -1. Click to expand...
Thanks alot! Got the idea to solve it. Cheers!! Nigel Goodwin said: You're missing the input resistor, equal resistors, gain of -1. Click to expand...