Electrical Engineering Archive: Questions from August 06, 2009
SeongXiong askedDesign a passive low-filter using resistors and a 100uF capacitorthat will have a passband gain of 0...Design a passive low-filter using resistors and a 100uF capacitorthat will have a passband gain of 0.8 and a cutoff frequency of10000 HZ.
SeongXiong askedClearly state any simplifyingapproximatio...The amplifier shown has a BJT with =200,
1.Find Clearly state any simplifyingapproximations that you use.
2. Draw the small signal equivalent circuit, all component valuemust be shown on yours diagram.
3. Estimate the mid-band voltage gain.
4. Calculate the high frequency cutoff.
SeongXiong askedDraw the small signal equivalent...The BJT in the amplifier shown below has the followingparameters:
Draw the small signal equivalent circuit. For the frequencies weare interested in, you may treat the blocking and bias capacitorsas shorts.
1. Calculate the midband gain,
2. Calculate the Miler Capacitance.
3. Calculate the value of the first upper corner frequency in hertzor radian/sec. that is, at what frequency does the gain of thisamplifier begin to drops?