ATT FC/ET Week 6 Exam Questions With 100% Correct Answers 2023

The transistor in a multivibrator are biased __________. - so that they are either in cutoff or saturation How many transistors do multivibrators have? - 2 The purpose of a multivibrator is to _______. - convert DC energy to square wave energy When transistors in a multivibrator is on, the output voltage is _________. - LOW Triggered multivibrators generate a square wave output - only when an external input is applied. In monostable multivibrators, the output of Q2 is fed back through the ________. - resistor to the input of Q1 In multivibrator feedback circuits, how are the transistors connected? - Q1 output to Q2 input and Q2 output to Q1 input Multivibrator frequency is determined by ___________. - the components in the feedback circuit. In an astable multivibrator, what determines which transistor turns ON when power is first applied? - The transistor that conducts first In an astable multivibrator, with Q1 ON Q2 is turned on by ____________. - C1 Charging When Q2 turns ON, Q1 is turned OFF by ________. - C2 Discharging In this astable multivibrator, what component is the collector load resistor for Q2? - R4 In this astable multivibrator, what component is the base biasing resistor for Q1? - R3 In this multivibrator, the purpose of R6 is ____________. - symmetry control The frequency of this astable multivibrator is ___________. - 1.26 kHz In this astable multivibrator, the purpose of C1, C2, R2, R4, and D2 is ____________. - External synchronizing. The frequency of this astable multivibrator is ____________. - 1.13 kHz In this astable multivibrator, the purpose of R5 is ________. - frequency control In this astable multivibrator, what components determine the frequency of the output square wave? - C1, R2 and C2, R3 What type of feedback circuit do astable multivibrators use? - The purpose of an astable multivibrator is to _______. - convert DC energy to square wave energy In this astable multivibrator, the purpose of C1, C2, R2, R4, and D2 is _______. - external synchronizing In this astable multivibrator, the purpose of D1 and D3 is _____. - to ensure sharp rise times. In this circuit, the amount of AVC voltage is Determined by the strength of the incoming ______. - IF signal The section of a basic receiver that contains the RF amplifier, local oscillator, and mixer circuits is the ___________. - tuner The DC input at the bottom of R5 from the detector is ______. - negative AVC voltage Q6 and Q7 are ________ amplifiers. - push - pull When S1 is placed to OPR, if the IF signal strength at the detector decreases, what happens to the base bias voltage on Q2 - Positive bias increases This type of waveform would be the output of the __________. - detector In the tuner circuit, this waveform is found at the ________. - output of the local oscillator. In the tuner circuit, this waveform, at 455 kHz, is found at the ___________. - output of the circuit Between TP4 and TP3, the feedback signal is shifted _______. - 180 degrees When an oscillator is first turned on, noise is generated by the ________. - resistors