41. Bootstrap voltage sweep generator uses
42. Using the incremental low frequency small-signal model of the MOS device, the Norton equivalent resistance of the following circuit is
43. The approximate O/P Frequency of 555 Oscillator for RA = RB = 2.2 kΩ and C = 2000 pF-
44. The current gain of a BJT is
45. The cascade amplifier is a multistage configuration of
46. An OPAMP-based comparator drives an LED, with VF = 1.6V, the current through which is regulated by a 1 kΩ resistor and a silicon diode in series. Assume a ±10V DC voltage is applied as ±VCC respectively to the op-amp. Then find out the current through the LED when the comparator output is +10V.
47. Blocking oscillators are used as
48. What is the formula of lower cut-off frequency of an RC coupled amplifier?
49. A common emitter transistor amplifier has a collector load of 10 kΩ. If its hfe = 100 and hie = 2 kΩ (hre ≈ hoe ≈ 0), the voltage amplification of the amplifier is nearly equal to
50. When the gate-to-source voltage (VGS) of a MOSFET with threshold voltage of 400 mV, working in saturation is 900 mV, the drain current is observed to be 1 mA. Neglecting the channel length modulation effect and assuming that the MOSFET is operating at saturation, the drain current for an applied VGS of 1400 mV is
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