题目内容
（请给出正确答案）
[主观题]
Positive feedback is used to produce a special type of circuit called a（n) _______.
A、inverting amplifier
B、noninverting amplifier
C、oscillator
D、feedback regulator
提问人：网友pwl999
发布时间：2022-01-07
题目内容
（请给出正确答案）
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第3题
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第4题
Calculate the gain of a negative feedback amplifier having A = 1000 and F = 0.099.
A、1000
B、100
C、10
D、1
第5题
The feedback circuit connection shown here is _______ 
A、voltage series feedback
B、voltage shunt feedback
C、current series feedback
D、current shunt feedback
第6题
The _______ margin is defined as the negative of the value of |AF| decibels at the frequency at which the phase angle is 180°.
A、error
B、phase
C、gain
D、feedback
第7题
Adding a negative voltage-feedback network to an amplifier has no effect on the value of ________ for the circuit.
A、input impedance
B、frequency response
C、signal distortion
D、None of the above
第8题
The _______ margin is defined as the angle of 180° minus the magnitude of the angle at which the value |AF| is unity (0 dB).
A、error
B、phase
C、gain
D、feedback
