所屬科目：中山◆電機◆電子學
(b) Find the input resistance and overall gaineffect needs to be considered).
(c) If is sinusoid with a peak amplitude , find the maximum allowable value of for which the transistor remains in saturation. What is the corresponding amplitude of the output voltage?
(d) What is the value of resistance R3 that needs to be inserted in series with capacitor as shown in Fig. 2 in order to allow us to double the input signal peak amplitude ? What output voltage now results?
(b) If a load resistance 6201e198c95be. = 1 kΩ is connected to the output terminal, find the voltage gain from the base to the emitter of Q2 and the input resistance 6201e1c213cbb. looking into the base of Q2.
(a) Calculate the differential gain .
(b) Let the output resistance of current source is 25 kΩ. Calculate common-mode gain 620 and CMRR (in dB).
4.Consider a CC-CE amplifier such as that in Fig. 5 with the following specifications: I1 = I2 = 1 mA and identical transistors with β = 100, = 400 MHz, and = 2 pF. Thermal voltage = 25 mV. Let the amplifier be fed with a source having a resistance = 4 kΩ, and assume a load resistance = 4 kΩ. Find the midband voltage gain Vo/vsig and estimate the 3-db frequency fH by the method of open-circuit time constants (please show the value of each time constant).
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= 0.3 V. What must the MOSFET's 
(W/L) be? What is the dc voltage at the drain? 
and overall gain
effect needs to be considered).
is sinusoid with a peak amplitude 
, find the maximum allowable value of for which the transistor remains in saturation. What is the corresponding amplitude of the output voltage? 
as shown in Fig. 2 in order to allow us to double the input signal peak amplitude ? What output voltage now results?
= 1 kΩ is connected to the output terminal, find the voltage gain from the base to the emitter of Q2 and the input resistance 6201e1c213cbb.
looking into the base of Q2. 
.
and CMRR (in dB). 
= 400 MHz, and 
= 2 pF. Thermal voltage 
= 25 mV. Let the amplifier be fed with a source 
having a resistance
= 4 kΩ, and assume a load resistance 
= 4 kΩ. Find the midband voltage gain Vo/vsig and estimate the 3-db frequency fH by the method of open-circuit time constants (please show the value of each time constant).