Originally posted by JoeJester@Jun 14 2005, 03:35 PM
davidand,
Both schematics are difficult to read. Did you get them out of a book?
To cut down on the file size, try saving them as gif or jpg.
[post=8497]Quoted post[/post]
Originally posted by JoeJester@Jun 14 2005, 06:21 PM
David,
As far as your regulator goes, the opamp is operating as a voltage comparator. When the sample voltage [top of RL] exceeds the reference [the zener] Q1 stops conducting and when it drops below the reference, Q1 starts conducting. VL is approximately 24 volts.
What was the question on the other circuit?
[post=8500]Quoted post[/post]
Yes but the VGG polarity is backwards and the VDD = 20vOriginally posted by JoeJester@Jun 14 2005, 07:28 PM
Ok ....
Here's what I think that second circuit looks like .... let me know where my errors are.
[post=8504]Quoted post[/post]
Originally posted by JoeJester@Jun 15 2005, 11:01 AM
20 - (1 mA * 7k) = 13 V
You are correct.
In my now deleted post, I didn't know of the additional information.
Are all these questions from a single reference?
[post=8527]Quoted post[/post]
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