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steveB said:Q2: The "DC amplifier offset control" is just the signal E. The "DC amplifier" refers to the fact that this control signal needs to come from a DC amplifier (e.g. OPAMP circuit or something similar). The "offset control" refers to the fact that the VCO outputs a nominal frequency when E=0, and the frequency is offset from nominal as E is offset from zero (not all systems work this way and a DC shift may be needed, which makes the terminology imperfect). This frequency is offset (or tuned) by changing the Voltage E. I'm not sure how universal this nomenclature is, but it is descriptive of the function.
But isn't then the "DC error voltage" and "DC amplifier offset control" the same things as JimB also pointed out? Please let me know.
Just a bit curious. Why would high resistance increase noise? As a matter of fact, I can't even picture the 'noise' here.