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Keithley 610C: Difference between revisions
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The opamp has a three-level zero adjustment, with switches for coarse and medium levels, and a 10-turn potentiometer for fine nulling. Zero drift is fairly low once warmed up, especially compared to the predecessor units like the [[Keithley 610B]] which still relied on electrometer vacuum tubes in the input stage. | The opamp has a three-level zero adjustment, with switches for coarse and medium levels, and a 10-turn potentiometer for fine nulling. Zero drift is fairly low once warmed up, especially compared to the predecessor units like the [[Keithley 610B]] which still relied on electrometer vacuum tubes in the input stage. | ||
The 610C contains only 10 transistors and 2 | The 610C contains only 10 transistors and 2 MOSFETs altogether, which are all used for amplification. The power supply is regulated using Zener diodes. | ||
==Pictures== | ==Pictures== | ||