Difference between battery and voltage source in tina ti
Answers
Explanation:
I'm using TINA-TI v9 on a Windows 7 computer. I've found that it has a magic voltage source. I tried setting up a battery-powered circuit with an op-amp ground driver, to split the battery voltage to plus and minus 0.9V, simulating alkaline cells at the end of life. A ground driver merely takes the center tap of a 2R voltage divider across the battery, and uses an gain-of-one op amp voltage follower to drive the ground. It works; I've done it with a 9V battery and a TL081C op-amp.
But it doesn't simulate very well in TINA-TI. The attached file 2014-08-20-magic source.TSC shows the basic setup with a battery switch and an additional circuit generating a reference voltage to ground off a pair of diodes, plus a few meters. With the battery switch open, the voltmeter across the other side of it shows about 0.967V with the T&M Multimeter. It will go to nearly zero only if the shorting switch on the right side is closed, and will go back up when the shorting switch is opened. In the circuit, 2014-08-20-magic source-b.TSC, the op-amp circuits are disconnected from the battery switch entirely. The Multimeter then measures a voltage of about 0.4V.
It's a miracle. If only we could scale this up, we could all switch to electric cars with infinite driving ranges ;)