Hi, can I know where to get a analogue adder circuit thanks.
W [email protected] Jan 1, 1970 0 Jan 17, 2007 #1 Hi, can I know where to get a analogue adder circuit thanks.
J Jan Panteltje Jan 1, 1970 0 Jan 17, 2007 #2 Hi, can I know where to get a analogue adder circuit thanks. Click to expand... 2 resistors.
F Fred Bartoli Jan 1, 1970 0 Jan 17, 2007 #3 Jan Panteltje a écrit : 2 resistors. Click to expand... That one will also divide by 2 for free. If the OP really wants an adder he'll need one opamp and 2 Rs more.
Jan Panteltje a écrit : 2 resistors. Click to expand... That one will also divide by 2 for free. If the OP really wants an adder he'll need one opamp and 2 Rs more.
J Jan Panteltje Jan 1, 1970 0 Jan 17, 2007 #4 Jan Panteltje a écrit : That one will also divide by 2 for free. If the OP really wants an adder he'll need one opamp and 2 Rs more. Click to expand... Depends, if he feeds the 2 R into a low impedance point he adds current just fine without dividing. It is all ration and error allowed. 1M and 1M into your uA meter (1k impedance perhaps) adds with .1% error.
Jan Panteltje a écrit : That one will also divide by 2 for free. If the OP really wants an adder he'll need one opamp and 2 Rs more. Click to expand... Depends, if he feeds the 2 R into a low impedance point he adds current just fine without dividing. It is all ration and error allowed. 1M and 1M into your uA meter (1k impedance perhaps) adds with .1% error.
J Joerg Jan 1, 1970 0 Jan 17, 2007 #5 Fred said: Jan Panteltje a écrit : That one will also divide by 2 for free. If the OP really wants an adder he'll need one opamp and 2 Rs more. Click to expand... IN+ to GND, the 2 Rs from input sources to IN-, one more R from there to OUT. Saves 1 R or about $0.008 fully burdened Ok, it also inverts.
Fred said: Jan Panteltje a écrit : That one will also divide by 2 for free. If the OP really wants an adder he'll need one opamp and 2 Rs more. Click to expand... IN+ to GND, the 2 Rs from input sources to IN-, one more R from there to OUT. Saves 1 R or about $0.008 fully burdened Ok, it also inverts.
J Joel Kolstad Jan 1, 1970 0 Jan 17, 2007 #6 Joerg said: IN+ to GND, the 2 Rs from input sources to IN-, one more R from there to OUT. Saves 1 R or about $0.008 fully burdened Click to expand... I bet you build your instrumentation amplifiers using the two op-amp approach rather than the better-known three op-amp approach too, right?
Joerg said: IN+ to GND, the 2 Rs from input sources to IN-, one more R from there to OUT. Saves 1 R or about $0.008 fully burdened Click to expand... I bet you build your instrumentation amplifiers using the two op-amp approach rather than the better-known three op-amp approach too, right?
J JeffM Jan 1, 1970 0 Jan 17, 2007 #7 wslim22@ gmail.com said: Hi, can I know where to get a analogue adder circuit thanks. Click to expand... http://groups.google.com/group/sci....ongs-in+uu+*-*-not-*-*-*-a-tutorial-newsgroup http://www.google.com/images?q=summing-amplifier
wslim22@ gmail.com said: Hi, can I know where to get a analogue adder circuit thanks. Click to expand... http://groups.google.com/group/sci....ongs-in+uu+*-*-not-*-*-*-a-tutorial-newsgroup http://www.google.com/images?q=summing-amplifier
J Joerg Jan 1, 1970 0 Jan 17, 2007 #8 Joel said: I bet you build your instrumentation amplifiers using the two op-amp approach rather than the better-known three op-amp approach too, right? Click to expand... Nope, with the two-transistors-glued-together approach ))
Joel said: I bet you build your instrumentation amplifiers using the two op-amp approach rather than the better-known three op-amp approach too, right? Click to expand... Nope, with the two-transistors-glued-together approach ))