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You Are On Multi Choice Question Bank SET 1062

53101. What is the difference between common-mode and differential-mode input signals?





53102. A circuit that uses an amplifier with passive filter elements is called a(n):





53103. The input offset current equals the





53104. Feedback is used in an open-loop operational amplifier circuit.



53105. This circuit is operating in a closed-loop mode.



53106. This circuit is a bandpass filter.



53107. This circuit is a voltage follower.



53108. If the two inputs to a differential amplifier are exactly the same, then the output is the signal multiplied by two.



53109. A virtual ground is a ground for current, but not for voltage.



53110. An op-amp has very low open-loop gain.



53111. If an input signal is applied to the inverting input of an op-amp with the noninverting input grounded, the output signal would be opposite in polarity with the input.



53112. The TO-5 operational amplifier package can have 5 pins.



53113. Operational amplifiers (op-amps) use internal capacitive coupling between stages.



53114. An operational amplifier contains a differential amplifier, a voltage amplifier, and an output amplifier.



53115. If an input signal is applied to the inverting input of an op-amp with the noninverting input grounded, the output signal would be opposite in polarity to the input.



53116. The inverting input is pin 2.



53117. An S-R flip-flop is an example of a bistable multivibrator circuit.



53118. The ideal output impedance for an operational amplifier is 0 .



53119. Current actually flows into or out of a virtual ground.



53120. A voltage-follower op-amp has the output connected directly to the inverting input.



53121. The frequency of a crystal is dependent on how much voltage is applied to activate it.



53122. If the two inputs to a differential amplifier are exactly the same, then the output is the signal multiplied by 2.



53123. An inverting amplifier has a phase shift of 180° from input to output.



53124. The feedback resistor adds to the gain of an op-amp.



53125. A 555 timer can be configured as an astable multivibrator.



53126. A monostable multivibrator must be triggered.



53127. The voltage-follower amplifier circuit has a fixed voltage gain of approximately 10.



53128. An astable multivibrator has two states.



53129. If the frequency of an astable multivibrator is 54.86 kHz then its period is 1.82 s.



53130. An open feedback resistor in an inverting or noninverting op-amp circuit can cause severe clipping of the output signal.



53131. It takes 4 s for the output voltage of an op-amp to rise from –14 V to +14 V. The slew rate of this op-amp is 3.5 V/s.



53132. The difference between the upper and lower trigger points is called the Schmitt trigger.



53133. Changing the input voltage to an op-amp circuit will change its voltage gain.



53134. This circuit is a differentiator.



53135. Crystal oscillator circuits have a very low Q.



53136. In a common-mode input to an op-amp, both inputs are connected to the same signal source.



53137. A PLL can be used as a(n) ___________.





53138. Common-mode signals have _____.





53139. A circuit that has an output equal to the algebraic sum of the inputs is called a(n) ______ .





53140. Switching voltage regulators have ______ than linear regulators.





53141. A ______ is not a multivibrator.





53142. An op-amp circuit in which the output voltage is equal to the difference between the two input voltages is called a(n) _____





53143. The feedback resistor has a value of ______ in the given circuit





53144. The input impedance is ______ for the amplifier in the given circuit. The data sheet values are Zin = 3 M, Zout = 80 , and Aol = 250,000.





53145. The Q of a crystal _________.





53146. The 555 timer can be connected to operate a(n) ___________.





53147. The input voltage must be ______ in the given circuit to obtain the given output voltage.





53148. The voltage required to force the differential output to zero is called _______.





53149. If the input to a comparator is a sine wave, the output is a(n) _________.





53150. The common-mode rejection ratio (CMMR) is the ratio of _____ to ______.





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