Of all the amplifiers, this product with...he audible spectrum.

Output amplifiers are packed______ cartons of 100 pieces each.

The main function of the power amplifiers is to provide a sufficiently large power signal to the load. ()

BJTs are commonly used as （ ）. A: the primary components in amplifiers B: series damper circuits C: the primary components in rectifiers

The electronic components of a contemporary electronic system are mainly ( ). A: IC chips B: Transistors C: Field effect transistors D: Integrated operational amplifiers

Which of the following statements is true? A: Op-amps are high-gain dc amplifiers B: Op-amps have extremely high input impedance. C: Op-amps have extremely low output impedance. D: All of the above

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