Valid.The 5KΩ resistors are not very accurate. It is interesting to note that IC fabrication doesn't generally allow precision resistors, but the resistors compared to each other are extremely close in value, which is critical to the circuits operation.
That's a good example of the correct use of the word "penultimate;" often, it is misused to mean "the best," or "at the top."
by Aaron Carman
by Jake Hertz
by Dale Wilson
by Aaron Carman