Hey guys,
I got given an assignment which involves being given a resistive bridge that looks like this:
Where the resistors are all variable. I applied +10V and V+ and -10V at V-. At points A and B we got (pretty close to) 0V.
Then we applied points A and B to this circuit where the black dots are:
And wham.. the collector voltages of the transistors are now very closely matched... A little while earlier, we had just grounded these terminals (effectively 0V as well), and the collector voltages weren't so closely matched.
So why is *this* 0V matching the voltages so much better than the other 0V?
Thanks!
Andrew
I got given an assignment which involves being given a resistive bridge that looks like this:
Where the resistors are all variable. I applied +10V and V+ and -10V at V-. At points A and B we got (pretty close to) 0V.
Then we applied points A and B to this circuit where the black dots are:
And wham.. the collector voltages of the transistors are now very closely matched... A little while earlier, we had just grounded these terminals (effectively 0V as well), and the collector voltages weren't so closely matched.
So why is *this* 0V matching the voltages so much better than the other 0V?
Thanks!
Andrew