Transistors Objectives part 04
61 . A reverse bais saturation current for a particular. PN junction is 1 micro amperes at 300 k .its dc slope resistance at 150 mv forward bias will be closer to 78 ohm
62 . Which of the following is not provided in a PNP transistor heater.
63 . Which of the following amplifier circuit using junction transistor has the best gain common emitter.
64 . Each of two cascade stage has a voltage gain of 30. The overall gain is 900.
65 . The Darlington pair consists of the following two stages both CC.
66 . In amplifier, the parasitic oscillations result due to transistor inter junction capacitance.
67 . Which of the following combination has no phase inversion of the signal two CE stages.
68 . The circuit consisting of two transistor connected in series with the dc supply voltage is called stacked v+.
69 . In oscillator class C operation in preferred because it is most efficient.
70 . Three cascade stages have gain of 10,20 and 25. The overall gain will be 5000.
71 . How many cascaded stages of CE amplifier will result in polarity inversion of the input signal three or five.
72 . Type equation here.72. Which coupling produces the minimum interference with frequency response direct coupling.
73 . Complimentary symmetry use two transistor that are PNP AND NPN.
74 . Which of the following circuit can operate class AB for audio power output Darlington pair.
75 . A dc amplifier both ac and dc.
76 . For an amplifier the power gain in decibels will be equal to voltage gain in decibels only when R0=Ri.
77 . The bandwidth of the amplifier is BW. If n stages of an such an amplifier are cascaded, the bandwidth will be
78 . A bipolar transistor is a current controlled device whereas a FET is a voltage-controlled device.
79 . Which of the following devices acts as a NPN and a PNP transistor connected base to base and
emitter to collector SCR.
80 . Which of the following is the fastest switching device MOSFET.