I am working through Lab 13 of "Student Manual for the Art of Electronics," and I have a few basic questions on section 13-4 (see attachment). First, I am instructed to drive the circuit "with a TTL level from the breadboard oscillator, pulled up to +5V, through a 1k resistor." First of all, I assume they mean I am supposed to pull up the oscillatory TTL signal so that it has a 5V dc offset, right? And second, how exactly am I supposed to accomplish this using a 1k resistor?
I went ahead and performed the experiment without doing an pull-up to the input, and I still see the effect I think they're getting at: the output is no longer a perfect square wave, but is rounded, showing capacitive effects. Is this because the MOSFET acts like a resistor in parallel with a capacitor, and at higher input frequencies the capacitor can't charge fast enough to keep up? Thanks for the help.
I went ahead and performed the experiment without doing an pull-up to the input, and I still see the effect I think they're getting at: the output is no longer a perfect square wave, but is rounded, showing capacitive effects. Is this because the MOSFET acts like a resistor in parallel with a capacitor, and at higher input frequencies the capacitor can't charge fast enough to keep up? Thanks for the help.
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