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Can I ground AC voltage sources when I do DC analysis of differential amplifier with BJT and current mirrors circuits?

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  • \$\begingroup\$ Only if they, themselves, don't have DC. \$\endgroup\$ – a concerned citizen May 21 '18 at 15:43
  • \$\begingroup\$ If you want to ignore a source for a particular analysis, you typically "zero" it (set it to 0 V or 0 A) rather than ground it. \$\endgroup\$ – The Photon May 21 '18 at 15:46
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When doing DC analysis, if the AC sources don't have a DC component themselves, it is possible to analyze the circuit ignoring the AC sources.

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