68201. For an amplifier the input output signals are shown in figure. The class of amplifier is
68202. In a N-P-N transistor the function of the emitter is
68203. The noise figure is
68204. A Darlington pair is used for
68205. In a shunt-shunt negative feedback amplifier, as compared to the basic amplifier
68206. In rectifiers the use of RC filters is recommended when
68207. The coupling capacitor mainly affects
68208. A CE amplifier is the most common BJT amplifier.
68209. The main drawback in the performance of shunt peaked wide band amplifier is
68210. A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The current amplification is
68211. In a CE amplifier circuit
68212. In a push pull circuit the two transistors are
68213. The oscillator shown in figure is a
68214. In which configuration does output ac voltage appear between emitter and ground?
68215. Figure represents a
68216. At high frequencies the output circuit of transistor amplifier reduces to
68217. A pulse transformer uses
68218. A transistor in CE mode is in saturation region. Then the collector is almost at
68219. The semi-conductor type 2 N 34 indicates
68220. The emitter bias largely depends on
68221. A limiter circuit can be built using a diode and resistance.
68222. In saturation region JFET acts like a
68223. Which of the following are difficult to be fabricated in a monolithic IC?
68224. In an op-amp a common mode signal is applied to
68225. The ripple factor of a full wave rectifier is about 0.5.
68226. Which of the following op-amp circuits has zero resistance in the feedback path?
68227. In an LC filter, the ripple factor,
68228. FET can used in
68229. The Malayalam literateur who received the Jnanapith Award in 2007?
68230. Each of two cascaded stages has a voltage gain of 30. The overall gain is
68231. A two stage amplifier has an upper cutoff frequency of 2 MHz and a lower cutoff frequency of 2 MHz and a lower cut off frequency of 30 Hz. If both stages are similar, their individual upper and lower cut off frequencies respectively are
68232. A bipolar transistor is a __________ controlled devices whereas a FET is a __________ controlled devices.
68233. The input impedance of a non-inverting amplifier is very low.
68234. RC oscillator can be used upto
68235. In a N-P-N transistor of the emitter junction is reverse biased and collector junction is also reversed biased, the transistor will operate in
68236. Wide banding technique is employed in the
68237. Assertion (A): The maximum efficiency of a class B push pull amplifier is 78.5%Reason (R): A current mirror uses a compensating diode in parallel with the emitter diode
68238. In a common Emitter BJT amplifier, the maximum usable supply voltage is limited by
68239. High frequency oscillations can be caused by
68240. In order to obtain triangular pulses at the output of the circuit in the figure, the input should be.
68241. In which of the following cities was the Indian Biodiversity Congress(2010)held?
68242. A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What will be the effect on output if the amplifier's gain is twice that required by the Barkhausen criterion?
68243. -------------sector has established itself as the biggest contributor to the State’s GDP as per Kerala State’s Economic Review(February 2011)
68244. In a combination limiter with sinusoidal input voltage the output wave can be nearly square.
68245. Assertion (A): A Darlington amplifier has very low output impedanceReason (R): The circuit has a low resistance RE between emitter and ground
68246. Name the most significant characteristic of National Integration:
68247. A silicon PN junction diode under reverse bias has depletion region of width 10 μm. The relative permittivity of silicon, εr = 11.7 and the permittivity of free space ε0 = 8.85 x 10-12 F/m. The depletion capacitance of the diode per square meter is
68248. The properties of FETs resemble closely to
68249. The source of the harmonic distortion in a RC coupled transistor amplifier is usually
68250. Two transistors have same value of a but different gain (G) bandwidth (B) product. The transistors have similar geometry. However one of them is germanium and the other is silicon. The transistor with lower GB product
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