To what circuit arrangement is a common-base detector  equivalent?

1 Answer

Answer :

A diode detector followed by a stage of audio amplification.

Related questions

Description : Which junction acts as the detector in a common-base detector?

Last Answer : Emitter-base junction.

Description : In a logic circuit the NOR and NAND gate functions ____________. A. must be accomplished with a common base transistor arrangement B. are available in diode form C. are exact opposites with the ... . have output conditions that are exact opposites to the output condition for OR and AND, respectively

Last Answer : Answer: D

Description : What circuit functions does the tube in a gated-beam detector serve?

Last Answer : Limits, detects, and amplifies.

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Last Answer : When the input voltage variations are too small to give a usable output from a series detector.

Description : What simple, one-transistor detector circuit uses the heterodyne principle?

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Description : What are the four most common materials used in semiconductor detector fabrication?

Last Answer : Silicon, gallium arsenide, germanium, and indium phosphide.

Description : How is the output signal developed in the common-emitter detector?

Last Answer : By the collector current flow through R4.

Description : Which junction of the transistor in the common-emitter detector detects the modulation envelope?

Last Answer : Emitter-base junction

Description : What is the current gain in a common-base circuit called?

Last Answer : Alpha (α).

Description : The area between base 1 and base 2 in a UJT acts as what type of common circuit component?

Last Answer : Variable resistor.

Description : What is the total resistance of the circuit shown in figure 3- 59? (Hint: Redraw the circuit to simplify and then use equivalent resistances to compute for RT.)

Last Answer : 4Ω

Description : Sound waves transmitted from a source are sometimes weak when they reach the detector. What instrument is needed to boost the weak signal?

Last Answer : An amplifier.

Description : In the output of an ac error detector, what indicates the (a) direction and (b) amount of control necessary for correspondence?

Last Answer : (a) Phase. (b) Amplitude.

Description : An error signal is the difference between what two quantities fed to the CT (error detector)?

Last Answer : Input signal and feedback.

Description : Why is detector saturation not generally a problem in fiber optic communications systems?

Last Answer : Because fiber optic communications systems operate at low optical power levels.

Description : For efficient operation, should a detector have a high or low responsivity at the operating wavelength?

Last Answer : High.

Description : Describe the operation of an optical detector

Last Answer : It is a transducer that converts an optical signal into an electrical signal. It does this by generating an electrical current proportional to the intensity of incident optical radiation.

Description : What is the function of the detector?

Last Answer : To extract the modulating audio signal.

Description : How can a peak detector for pam be modified to detect pdm?

Last Answer : By making the time constant for charging the capacitor at least 10 times the maximum received pulse width.

Description : What is the time constant of the resistor and capacitor in a peak detector for pam?

Last Answer : At least 10 times the interpulse period.

Description : What characteristic of a pulse does a peak detector sample?

Last Answer : Pulse amplitude or pulse duration

Description : In its simplest form, what functions must a radar detector be capable of performing?

Last Answer : Detecting the presence of rf energy.

Description : How is a quadrature detector changed when used for phase demodulation?

Last Answer : The quadrature grid signal is excited by a reference from the transmitter.

Description : Name two advantages of the gated-beam detector.

Last Answer : Extreme simplicity, few components, and ease of adjustment.

Description : What condition must exist on both the limiter and quadrature grids for current to flow in a gated-beam detector?

Last Answer : Both grids must be positively biased

Description : What is the primary advantage of a ratio detector?

Last Answer : Suppresses amplitude noise without limiter stages.

Description : What is the function of an fm detector?

Last Answer : Converting frequency variations of received fm signals to amplitude variations

Description : What is the simplest form of fm detector?

Last Answer : Slope detector.

Description : which components act as the filter network in the diode detector?

Last Answer : C1 and R1.

Description : How does the current-diode detector differ from the voltage-diode detector?

Last Answer : The current-diode detector is in parallel with the input and load.

Description : What is the function of the diode in a series-diode detector?

Last Answer : Rectifies the rf pulses in the received signal.

Description : What does the simplest diode detector use to reproduce the modulating frequency?

Last Answer : The modulation envelope.

Description : What three functions does the transistor in a regenerative detector serve?

Last Answer : Oscillator, mixer, and detector.

Description : To measure incident power, you must rotate the coupler detector of the wattmeter so that the arrow indicating power flow points toward which end of the transmission line?

Last Answer : Load.

Description : In a logic circuit, the NOT gate function _____________. A. does not alter a logical input B. serves to amplify a given signal level C. must be accomplished with a common collector transistor arrangement D. reverses an input logic condition

Last Answer : Answer: D

Description : A figure of merit used to measure the performance of a radiation detector. A. Noise equivalent power B. Ripple factor C. Safe factor D. Quality factor

Last Answer : A. Noise equivalent power

Description : What is the arrangement of both series and shunt components called?

Last Answer : Combination peaking.

Description : What is the main difference in the energy arrangement between an isolated atom and the atom in a solid?

Last Answer : The energy levels of an atom in a solid group together to form

Description : What is the junction arrangement of the original avalanche transit-time diode?

Last Answer : Pnin.

Description : What is the primary disadvantage of the pointer arrangement for indicating coil rotation?

Last Answer : Coil balance.

Description : What is the primary disadvantage of the pointer arrangement for indicating coil rotation?

Last Answer : Coil balance.

Description : Describe the physical arrangement of a ground screen.

Last Answer : It is composed of a series of conductors arranged in a radial pattern and buried 1 to 2 feet below the ground.

Description : In the arrangement shown, the magnitude of each resistance is `1Omega`. The equivalent resistance between O and A is given by

Last Answer : In the arrangement shown, the magnitude of each resistance is `1Omega`. The equivalent resistance between O and A is ... )/(3)Omega` D. `(5)/(6)Omega`

Description : A ground is indicated by the ground-detecting system on the main electrical switchboard. The FIRST step in locating the actual ground is to _____________. A. close all circuit breakers in ... ground detection system indicates normal C. change over generators D. check each circuit with a megohmmeter

Last Answer : Answer: B

Description : The voltage at the reference electrode of the circuit shown in the illustration is applied to the input of a/an ______________. EL-0090 A. class A detector whose output drives an ... drives an 2-stage isolation transformer D. magnetic amplifier whose output controls a saturable reactor

Last Answer : Answer: D

Description : A particular circuit that rids FM of noise A. Detector B. Discriminator C. Phase Shifter D. Limiter

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Description : Draw and label the circuit diagram of ratio detector 

Last Answer : Draw and label the circuit diagram of ratio detector  

Description : Draw the circuit diagram of practical diode detector and explain its working. 

Last Answer : Circuit diagram of practical diode detector:  Explanation- The circuit operates in the following manner- The diode has been reversed so that now the negative envelope is demodulated. Due to this ... to produce AGC voltage. The DC AGC voltage is proportional to the amplitude of AM signal. 

Description : Draw the practical AM diode detector circuit. Sketch its input and output waveforms. 

Last Answer : Practical AM diode detector 1. Skip distance:-Skip distance is defined as the shortest distance from a transmitter, measured along the surface of earth at which a sky wave of fixed frequency ... had taken place from a surface located at a greater height, called Virtual height of this layer.