To a common-collector(CC) amplifier, its collector is at ac ground

Which transistor amplifier configuration is the most commonly used?  （    ）

The differential amplifier circuit can reject the differential mode inputs.

Adding a negative voltage-feedback network to an amplifier has no effect on the value of （ ） for the circuit.

Here we can use a push-pull amplifier(推挽放大器) as was described earlier in this section(节).

A transistor can be mainly used for a/an A: Rectifier B: Amplifier C: Switch D: Filter E: LED

The startup company TransGadget has also invented a MOS-gated transistor called SuperT, with the symbol and terminal voltage-current characteristics given below.Engineers of TransGadget build a common source amplifier using SuperT as shown below.Here, \(V_S = $Vs V\), \(R = $R k\Omega\), and the transistor parameter \(f = $f \frac{mA}{V^3}\). The amplifier is biased with \(V_{IN} = $VIN V\).What is the dc operating point (bias) output voltage \(V_{OUT}\) (in Volts) of this amplifier?<br/>______

In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ），  what does SNR IN represent？（） A:  the signal to noise of the current optical amplifier B:  the signal to noise of the previous amplifier or source C:  the signal to noise introduced by the optical multiplexer D:  the accumulated noise to signal ratio of the optical channel

中国大学MOOC: The resistance of the load （负载）is too high for the amplifier（放大器）. 前后两个下划线介词短语分别充当_______。

The two input voltages of the differential amplifier are Ui1 = 0.04V ,and Ui2 = 0.08V, the common mode input voltage .? 0.04V|0.06V|0.08V|0.12V