Electronics & Communication Engineering - Electronics Devices and Circuits

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37.

What is the unit of the parameter ho?                        
A. Volt B. Ohm
C. Siemen D. No unit



38.

What does the negative sign in the voltage gain of the common-emitter fixed-bias configuration indicate?                        
A. The output and input voltages are 180° out of phase B. Gain is smaller than 1
C. Gain is larger than 1 D. None of the above



39.

The differential amplifier produces outputs that are                        
A. common mode B. in-phase with the input voltages
C. the sum of the two input voltages D. the difference of the two input voltages




40.

The ________ model suffers from being limited to a particular set of operating conditions if it is to be considered accurate.                        
A. hybrid equivalent B. re
C. β D. Thevenin



41.

Under which of the following condition(s) is the current gain Av=ÍÎ2Â?                        
A. ro ≥Â10RC B. RB ≥Â10re
C. ro ≥Â10RCÂand RBÂ≥Â10re D. None of the above



42.

The ________ configuration is frequently used for impedance matching.                        
A. fixed-bias B. voltage-divider bias
C. emitter-follower D. collector feedback



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