64051. An op-amp integrator uses a capacitor as the feedback element.
64052. An op-amp can be used as a comparator to determine when an input voltage exceeds a certain level.
64053. The output voltage of a summing amplifier is proportional to the sum of the input voltages.
64054. Operational amplifiers are never used as nonlinear devices.
64055. In an op-amp comparator, when the input voltage exceeds a reference voltage, the voltage output changes state.
64056. The R/2R ladder is commonly used for D/A converters.
64057. Bounding allows the output of a comparator to be an unlimited voltage.
64058. The difference between the UTP and the LTP is the hysteresis voltage.
64059. The output of an op-amp comparator will be zero when the input voltage exceeds the reference voltage.
64060. A positive feedback network for hysteresis improves an op-amp comparator's noise immunity.
64061. A Schmitt trigger is
64062. Refer to the given figure. This circuit is known as
64063. The output of a Schmitt trigger is a
64064. The permitted flavoring agent in butter is-----
64065. Refer to the given figure. A square-wave input is applied to this amplifier. The output voltage is most likely to be
64066. Refer to this figure. The value of VBC is:
64067. When a transistor is used as a switch, it is stable in which two distinct regions?
64068. The term BJT is short for
64069. For a silicon transistor, when a base-emitter junction is forward-biased, it has a nominal voltage drop of
64070. A certain transistor has IC = 15 mA and IB = 167 A; DC is:
64071. Refer to this figure. The value of VCE is:
64072. What does DC vary with?
64073. A BJT has an IB of 50 A and a DC of 75; IC is:
64074. Refer to this figure. The value of VBE is:
64075. What are the two types of bipolar junction transistors?
64076. In this circuit DC = 100 and VIN = 8 V. The value of RB that will produce saturation is:
64077. The value of DC
64078. A transistor data sheet usually identifies DC as
64079. What is the ratio of IC to IE?
64080. Refer to this figure. The value of DC = 100 and VIN = 8 V. Determine IC(sat).
64081. Which of the following is true for an npn or pnp transistor?
64082. What is the order of doping, from heavily to lightly doped, for each region?
64083. In what range of voltages is the transistor in the linear region of its operation?
64084. The magnitude of dark current in a phototransistor usually falls in what range?
64085. A 35 mV signal is applied to the base of a properly biased transistor with an r'e = 8 and RC = 1 k. The output signal voltage at the collector is:
64086. What is (are) general-purpose/small-signal transistors case type(s)?
64087. What is (are) common fault(s) in a BJT-based circuit?
64088. The dc load line on a family of collector characteristic curves of a transistor shows the
64089. Refer to this figure. Determine the minimum value of VIN from the following that will saturate this transistor.
64090. It is best to check a transistor in-circuit before removing it.
64091. A BJT consists of three regions: base, emitter, and collector.
64092. BJT transistors are of two general types, npn and pnp.
64093. In saturation, both the base-collector and base-emitter junctions are forward-biased.
64094. DC is the ratio of IC to IE.
64095. PD(max) is usually specified at 25°C. For higher temperatures, the value of PD(max) is greater.
64096. Both junctions of a BJT should be forward-biased for linear operation.
64097. If maximum IC and maximum VCE are applied to a BJT, maximum power dissipation will not be exceeded.
64098. DC = IE/IC
64099. Av RC/r'e
64100. Phototransistors usually respond only to light in the red or infrared spectrum.
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