64201. The common-emitter configuration has a ________ level of input impedance with a ________ voltage and current gain.
64202. For a common-base configuration, the input impedance is relatively ________ and the output impedance quite ________.
64203. The output voltage and the input voltage are ________ for the common-emitter configuration.
64204. AC current ratios ac and ac convert directly from h parameters.
64205. Besides the fact that DC = IC/IB and ac = IC/IB, these quantities are always the same for purposes of small-signal amplification.
64206. r'e is temperature dependent.
64207. A common-collector amplifier has high input impedance, good current gain, and a voltage gain of 1.
64208. The total voltage gain of a multistage amplifier is the product of the individual stage gains.
64209. A Darlington pair provides a very low input impedance.
64210. The output resistance of the common-emitter amplifier is approximately equal to the collector resistance.
64211. A coupling capacitor couples dc to an amplifier.
64212. A common-emitter amplifier has the advantages of good voltage, current, and power gain, but the disadvantage of a relatively low input impedance.
64213. The common-base amplifier has a good voltage gain, low input impedance, and high current gain.
64214. Which of the following configurations has the lowest output impedance?
64215. Which of the h-parameters corresponds to re in a common-base configuration?
64216. Refer to this figure. Find the value of IE.
64217. Which of the following is referred to as the reverse transfer voltage ratio?
64218. What is the range of the capacitor Cds?
64219. An amplifier rated at 30-W output is connected to a 5- speaker. Calculate the input voltage for the rated output if the amplifier voltage gain is 20 dB.
64220. A 3-dB drop in hfe will occur at a frequency defined by ________.
64221. An amplifier rated at 30-W output is connected to a 5- speaker. Calculate the input power required for full power output if the power gain is 20 dB.
64222. The larger capacitive elements of the design will determine the ________ cutoff frequency.
64223. Which of the following elements is (are) important in determining the gain of the system in the high-frequency region?
64224. The input power to a device is 10,000 W at 1000 V. The output power is 500 W, and the output impedance is 100 . Find the voltage gain in decibels.
64225. By what factor does an audio level change if the power level changes from 4 W to 4096 W?
64226. For audio systems, the reference level is generally accepted as ________.
64227. What is the range of the capacitors Cgs and Cgd?
64228. For the low-frequency response of a BJT amplifier, the maximum gain is where ________ .
64229. In the input RC circuit of a single-stage BJT, by how much does the base voltage lead the input voltage at the cutoff frequency in the low-frequency region?
64230. What is the normalized gain expressed in dB for the cutoff frequencies?
64231. Which of the low-frequency cutoffs determined by CS, CC, or CE will be the predominant factor in determining the low-frequency response for the complete system?
64232. Determine the break frequency for this circuit.
64233. What is the ratio of the common logarithm of a number to its natural logarithm?
64234. Which of the following configurations does (do) not involve the Miller effect capacitance?
64235. What magnitude voltage gain corresponds to a decibel gain of 50?
64236. By what other name(s) are the cutoff frequencies in a frequency response plot called?
64237. The ________-frequency response of a transformer-coupled system is calculated primarily by the stray capacitance between the turns of the primary and secondary windings.
64238. logea = ________ log10a
64239. In the hybrid or Giacoletto model, which one of the following does rb include?
64240. What is the ratio of the output voltage to the input voltage at the cutoff frequencies in a normalized frequency response plot?
64241. Which of the following statements is true for a square-wave signal?
64242. A change in frequency by a factor of ________ is equivalent to 1 decade.
64243. Which of the following capacitors is (are) included in Ci for the high-frequency region of a BJT or FET amplifier?
64244. In the input RC circuit of a single-stage BJT, by how much does the base voltage lead the input voltage for frequencies much larger than the cutoff frequency in the low-frequency region?
64245. In the ________-frequency region, the capacitive elements of importance are the interelectrode (between terminals) capacitances internal to the active device and the wiring capacitance between the leads of the network.
64246. What is the ratio of the output power to the input power at the cutoff frequencies in a normalized frequency response plot?
64247. The magnitude of the third harmonic is ________ of the magnitude of the fundamental.
64248. The ________ region produces the maximum voltage gain in a single-stage BJT or FET amplifier.
64249. The resistance associated with the 1-mW power level is ________ , chosen because it is the characteristic impedance of audio transmission lines.
64250. The Miller effect is meaningful in the ________ amplifier.
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