模拟电子技术基础（西安邮电大学）章节测试课后答案2024春

第五章测试

1.Given this configuration, determine the input impedance if VS = 40 mV, Rsense = 0.5 kΩ, and the input current is 20 μA.（    ）
A:1,500 Ω B:582 kΩ C:5.822 MΩ D:1.5 MΩ
答案:A
2.The transistor model replaces the （    ） with the junction diode's ac resistance.  
A:collector-base junction B:emitter—base junction   C:collector-emitter junction 3.Calculate the voltage gain for this circuit. （   ）
A:-16.34 B: -7.91 C:-8.4 D:-137.25 4.A transistor amplifier has an input signal applied to its emitter terminal and an output signal taken from its collector terminal. The amplifier is a(n) （    ）.
A:common-base amplifier B:common-emitter amplifier C:common-collector amplifier D:emitter follower 5.The voltage gain of a very well-designed common collector amplifier configuration, using a pnp transistor, is （    ）.
A:about -0.9 B:in the range -0.95 to -0.99 C:about 0.9 D:in the range 0.95 to 0.99