Log and Antilog Amplifier Question & Answers November 4, 2022 By WatElectronics This article lists 75 Log and Antilog Amplifier MCQs for engineering students. All the Log and Antilog Amplifier Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Log and Antilog Amplifier. The logarithmic and antilogarithmic amplifiers are very useful in performing mathematical operations or we can say that it is the essential part of the analog computer. So, apart from performing the mathematical operations, these log and antilog amplifiers are very useful for signal compression. So, using this amplifier we can even reduce or enhance the dynamic range of the signal. The log and antilog amplifiers can be designed by using the diode or transistors. Using the logarithmic characteristics of the circuit components it is possible to convert the multiplication into addition and division into subtraction and similarly, it is possible to convert the powers and roots into multiplication and division respectively. We have one signal A and if we pass this signal through the logarithmic amplifier followed by the scaling circuit which scales the input by some factor B, then the output of the circuit will be equal to B times the log of the signal A, and if we pass the signal through the antilog amplifier then we can raise the original signal to the power of the scaling factor. Similarly, let us assume that we are passing the output of the logarithmic amplifier through some division circuit, which divides the output of the logarithmic amplifier by a factor of one by two and then if we pass this signal through the antilog amplifier then we can find the square root of the original signal. The division circuit can be as simple as the voltage divider circuit just by changing the division factor. So, this type of circuit is very useful in finding the RMS value of the signal. 1). In how many ways logarithmic amplifiers can be designed? Two Four Three Six Hint 2). _________________ are the main applications of logarithmic and anti-logarithmic circuits? Compression Decompression Both a and b None of the above Hint 3). The voltage mode multiplier is one type of multiplier depending on ______________ mode? Input Output Input/output None of the above Hint 4). The precision transimpedance ______________ amplifier is an example of log amplifier? Audio frequency Radio frequency Power Logarithmic Hint 5). Which one of the following log amps is also called true logarithmic amplifier? Baseband log amp Demodulating log amp Both a and b None of the above Hint 6). The figure shown below ____________ compensated dual input log amplifier? Thermistor Transistor Temperature None of the above Hint 7). What is the standard form of ILA? Integrated Log Amp Internal Log Amp Interchange Log Amp None of the above Hint 8). Which one of the following amplifiers is non-linear circuit? Log Anti-log Both a and b None of the above Hint 9). The multipliers are categorized into _________________ types depend on circuit configuration? Two Four Three Six Hint 10). What is the standard form of OFCC? Operational Floating Current Conveyor Operational Floating Common Conveyor Operational Floating Conductance Conveyor None of the above Hint 11). The figure shown below is a circuit diagram of _________________ amplifier? Audio frequency Radio frequency Anti-log amplifier None of the above Hint 12). In how many ways anti-logarithmic amplifiers can be designed? Two Four Three Six Hint 13). What is the standard form of EDFA? Erbium Differential Fiber Amplifier Erbium Doped Fiber Amplifier Erbium Dynamic Fiber Amplifier None of the above Hint 14). The wavelength of erbium doped fiber amplifier is _________________? 20 mm 1540 m 1280 cm 1530-1560 nm Hint 15). Which one of the following amplifiers is polarization sensitivity? EDFA Raman SOA None of the above Hint 16). The figure shown below is a transfer function of _________________ amplifier? Audio frequency Radio frequency Anti-log amplifier Log amplifier Hint 17). The ln(xy) = ln(x) + ln(y) (product rule) is a property of ________________? Dielectric Natural log Antilog None of the above Hint 18). The gain of Raman amplifier is ______________ decibels? >25 >30 >40 >100 Hint 19). What is the standard form of SRS? Simple Raman Scattering Scattering Raman Simulated Simulated Raman Scattering None of the above Hint 20). What is the standard form of CDTA? Current Differencing Transconductance Amplifier Current Differencing Transformer Amplifier Current Differencing Triode Amplifier None of the above Hint Log and Antilog Amplifier MCQ for Quiz 21). The figure shown below is a circuit diagram of _________________ amplifier? Audio frequency Log amplifier Anti-log amplifier None of the above Hint 22). Which one of the following amplifiers is a switchable? EDFA Raman SOA None of the above Hint 23). What is the standard form of DWDM? Dynamic wavelength-division multiplexing Different wavelength-division multiplexing Dense wavelength-division multiplexing None of the above Hint 24). The absorption of light is the mode of excitation of ____________ phenomenon? Photoluminescence Phosphorescence Radioluminescence Cathodoluminescence Hint 25). The figure shown below is a graph of Y is equal to _________________? log(X) log (AK)=K1+A1 log(K/A) =K1-A1 None of the above Hint 26). What is the value of log eighteen? 1.30 1.26 1.78 1.28 Hint 27). Which one of the following options is the correct value for log 14? 1.18 1.15 2.30 5.67 Hint 28). What is the standard form of ASE? Amplified Spontaneous Energy Amplified Simple Emission Amplified Spontaneous Emission None of the above Hint 29). The gain of erbium doped Fiber amplifier is ______________ decibels? >25 >30 >40 >100 Hint 30). In which one of the following quadrant multipliers the opposite voltage can be added either of the inputs? Three-quadrant Two-quadrant One-quadrant None of the above Hint 31). The figure shown below is a circuit diagram of _________________ amplifier? Audio frequency Log amplifier Anti-log amplifier None of the above Hint 32). The wavelength of Raman amplifier is _________________? 1280-1650 nm 1540 m 1280 cm 1530-1560 mm Hint 33). What is the value of log 19? 1.30 0.30 1.78 1.28 Hint 34). What is the value of log sixteen? 1.30 1.26 1.20 1.28 Hint 35). The figure shown below is a basic log amp saturates with __________________ input? Positive Negative Positive/negative None of the above Hint 36). The biochemical process is the mode of excitation of ____________ phenomenon? Photoluminescence Phosphorescence Radioluminescence Bioluminescence Hint 37). The figure shown below is a logarithmic amplifier using ______________? FET Inductor BJT None of the above Hint 38). What is the value of log 20? 1.30 0.30 1.78 3.40 Hint 39). The gain of silicon optical amplifier is ______________ decibels? >25 >30 >40 >100 Hint 40). In which one of the following quadrant multipliers the opposite voltage can be added both of the inputs? Three-quadrant Two-quadrant One-quadrant Four-quadrant Hint Log and Antilog Amplifier MCQ for Exams 41). The figure shown below is a circuit diagram of _________________ amplifier? Audio frequency Log amplifier Anti-log amplifier None of the above Hint 42). What is the standard form of EDF? Erbium Differential Fiber Erbium Doped Fiber Erbium Dynamic Fiber None of the above Hint 43). The wavelength of silicon optical amplifier is _________________? 1280-1650 nm 1540 m 1280 cm 1530-1560 mm Hint 44). The frictional and electrostatic forces is the mode of excitation of ____________ phenomenon? Triboluminescence Phosphorescence Radioluminescence Bioluminescence Hint 45). The single stage amplifier is come under _____________ amplifier class? Resistor Transformer Transistor Generator Hint 46). The figure shown below is a ________________ log amp? Basic Detecting log amp True log amp None of the above Hint 47). Based on the output the transistor amplifiers are categorized into ______________ types? Two Three Four Five Hint 48). The figure shown below is a AD538 ______________ amp simplified diagram? Log Antilog Both a and b None of the above Hint 49). Which one of the following options is the correct value for log 13? 1.11 1.15 2.30 5.67 Hint 50). The multipliers are categorized into _________________ types based on the quadrant? Two Four Three Six Hint 51). Which one of the following logging elements is used to design the anti-log amplifier? Diode Transistor Resistor None of the above Hint 52). What is the standard form of SOA? Semiconductor Optical Amplifier Semiconductor Optional Amplifier Small Optical Amplifier None of the above Hint 53). The quinine is an example for ___________________ luminescence? Photoluminescence Phosphorescence Radioluminescence Bioluminescence Hint 54). What is the standard form of PDG? Polarization Dependent Gain Polarization Dependent Gain None of the above Hint 55). The figure shown below is a ________________ log amp? Basic Detecting log amp True log amp None of the above Hint 56). Which one of the following amplifiers cost factor is low? Erbium Doped Fiber Amplifier Raman Amplifier Silicon Optical Amplifier Both a and b Hint 57). The wavelength range of white light source is ___________________? 1525-1570 m 1525-1570 mm 1525-1570 cm 900-1700 nm Hint 58). What is the standard form of PDFA? Praseodymium Doped Fiber Amplifier Parallel Doped Fiber Amplifier Praseodymium Diffusion Fiber Amplifier None of the above Hint 59). The cathode ray tube is an example for ___________________ luminescence? Photoluminescence Phosphorescence Cathodoluminescence Bioluminescence Hint 60). The Current mode multiplier is one type of multiplier depending on ______________ mode? Input Output Input/output None of the above Hint Log and Antilog Amplifier MCQ for Students 61). Which one of the following logging elements is used to design the anti-log amplifier? Diode Transistor Resistor None of the above Hint 62). The log ratio and precision log amplifier used in ________________? Analytical Communications Medical instruments All of the above Hint 63). What is the standard form of FRA? Fiber Raman Amplifier First Raman Amplifier Fiber Raman Antilog None of the above Hint 64). Which one of the following amplifiers cost factor is high? Erbium Doped Fiber Amplifier Raman Amplifier Silicon Optical Amplifier Both a and b Hint 65). The figure shown below is an operational amplifier-based network appended to _______________ amplifier? Audio frequency Log amplifier Anti-log amplifier None of the above Hint 66). Which one of the following amplifiers cost factor is medium? Erbium Doped Fiber Amplifier Raman Amplifier Silicon Optical Amplifier Both a and b Hint 67). The wavelength range of amplified spontaneous emission is ___________________? 1525-1570 nm 1525-1570 mm 1525-1570 cm 1525-1570 m Hint 68). The power density of amplified spontaneous emission is ___________________? 1500-1570 nm 10-100 microwatts/nm 1525-1570 cm 1525-1570 m Hint 69). The CL mapping system is an example for ___________________ luminescence? Photoluminescence Phosphorescence Cathodoluminescence Bioluminescence Hint 70). In which one of the following quadrant multipliers the inputs are of same phase? Voltage mode Current mode One-quadrant None of the above Hint 71). The figure shown below is a block diagram of _________________? Log Antilog Log-antilog multiplication None of the above Hint 72). The multi stage log amplifier is one common application example of ______________ amplifier chip? Audio frequency Radio frequency Anti-logarithmic Logarithmic Hint 73). Which one of the following is not an example of log amplifier? Multistage log Precision transimpedance Both a and b None of the above Hint 74). Which one of the following log amps is also called successive detection logarithmic amplifier? Baseband log amp Demodulating log amp Both a and b None of the above Hint 75). Which one of the following amplifiers is not a switchable? Erbium Doped Fiber Amplifier Raman Amplifier Silicon Optical Amplifier Both a and b Hint Read more about Amplifiers For More MCQs Common Collector Amplifier Question & Answers. 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