题目内容
A transistor can be mainly used for a/an
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2 common types of power supply units (PSU) are__________ and switched-mode.
A common emitter amplifier, the input and output singles are in 180° phase displacement.
The 555 IC chip is a widely used amplifier circuit.
An operating point (Q) must set in the middle of the Load line (in a transistor amolifier).
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