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Why is the polarity of capacitors in RC coupled amplifiers such that the negative terminal receives the input signal?
Wiki User
∙ 13y ago
The input signal is assumed to have zero DC bias. Input stages will typically have a positive bias on the base or grid, respectively, of the first stage transistor or tube. So, the input terminal is more negative.
ANSWER: The polarity of the capacitor is determined by the bias polarity as used. If the bias is negative then the capacitor negative terminal must be connected to it.
Wiki User
∙ 13y ago
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