Description : What amplifier class of operation is the most inefficient but has the least distortion?
Last Answer : Class A.
Description : What two primary items determine the class of operation of an amplifier?
Last Answer : The amount of bias and the amplitude of the input signal
Description : For what class of operation is the final rf power amplifier of a plate-modulator circuit biased?
Last Answer : Class C
Description : The underlying principle of operation of the parametric amplifier is based on what property?
Last Answer : Reactance.
Description : What are the four classes of operation of a transistor amplifier?
Last Answer : A, AB, B, C.
Description : Explain with circuit diagram and waveform the operation of class AB push pull power amplifier.
Last Answer : Class AB Push Pull Power Amplifier: Circuit Diagram: Circuit Decription: The circuit consists of two centre-tapped transformers T1 and T2, two identical transistors Q1 and Q2 , Resistor R and ... two halves & produces a full sine wave in the load resistor. Waveform :
Description : Describe the operation of class-C type of power amplifier with the help of neat sketch.
Last Answer : Circuit diagram: Operation: * Class C power amplifier is a type of amplifier where the transistor conducts for less than one half cycle of the input signal. Less than one ... resonant circuit oscillates in one frequency (generally the carrier frequency) all other frequencies are attenuated.
Description : Draw diagram of class A push-pull amplifier and explain its operation.
Last Answer : Class A Push-pull Amplifier: The circuit diagram of class A push-pull amplifier is as shown in the fig.(a). Operation: The resistors R1 and R2 along with Vcc provide the dc biasing so as ... Vcc is applied to the collectors of transistors Q1 and Q2 through the centretapped output transformer.
Description : One of the following is a high powered RF ac basic transmitter that has two or more stages, the oscillator stage which determines the frequency opereation and RF amplifier stage orstages that develop the ... to develop a good frequency stability. A. Goldsmith B. MOPA C. Alexanderson D. Hartley
Last Answer : B. MOPA
Description : What class of operation has the highest fidelity?
Last Answer : Class A operation.
Description : Why is class C operation more efficient than class A operation?
Last Answer : The amplifier operates (and therefore uses power) for less time in class C than in class A.
Description : If the output of a circuit needs to be a complete representation of one-half of the input signal, what class of operation is indicated?
Last Answer : Class B operation.
Description : What determines the frequency, bandwidth, and power handling capability of a waveguide probe?
Last Answer : Size and shape
Description : A refracted wave occurs when a wave passes from one medium into another medium. What determines the angle of refraction?
Last Answer : The density of the two mediums, and the velocity of the waves.
Description : What determines whether these components are considered series or shunt?
Last Answer : . The relationship of the components to the output-signal path.
Description : Which quantity (voltage or current) determines the intensity of an electrical shock?
Last Answer : Current.
Description : In a dual-speed synchro system what determines the two specific speeds at which the data will be transmitted?
Last Answer : The gear ratio between the two transmitters.
Description : What determines whether a differential synchro adds or subtracts?
Last Answer : The way the differential synchro is connected in a system is the deciding factor on whether the unit adds or subtracts its inputs.
Description : the voltage drop across RS and R1 determines the amount of base-emitter ____ for Q1.
Last Answer : Bias.
Description : What determines the rate of discharge of the capacitor in a filter circuit?
Last Answer : Value of capacitance and load resistance.
Description : What determines the chemical activity of an atom?
Last Answer : The number of electrons in the valence shell.
Description : What factor determines whether a radio wave is reflected or refracted by the ionosphere?
Last Answer : Thickness of ionized layer.
Description : In an externally synchronized radar, what determines the prr of the transmitter?
Last Answer : The master oscillator.
Description : What factor determines the difference between the transmitted frequency and the received frequency in an fm transmitter?
Last Answer : Travel time.
Description : In addition to recovery time, what determines the minimum range of a radar set?
Last Answer : Pulse width
Description : . What determines the rate of discharge of the capacitor in a filter circuit?
Last Answer : Value of capacitance and load resistance
Description : The profile parameter (α) determines the shape of the multimode graded-index core's refractive index profile. As the value of the aincreases, how does the core's profile change?
Last Answer : From a triangular shape to step.
Description : What is the main factor that determines receiver sensitivity?
Last Answer : Noise
Description : What determines the shape and size of a soldering iron tip?
Last Answer : The type of work to be done.
Description : What determines the frequency of a tunnel-diode oscillator?
Last Answer : The tuned circuit or cavity frequency.
Description : When the repealer potential is constant, what property of the electron determines how long it will remain in the drift space of the reflex klystron?
Last Answer : Velocity.
Description : What determines the placement of the catcher cavity?
Last Answer : The frequency period of the buncher grid signal
Description : What determines the beam elevation angle of an antenna that is electronically scanned in elevation?
Last Answer : Frequency or phase of radiated energy.
Description : What determines whether a substance is a conductor or an insulator?
Last Answer : The number of valence electrons.
Description : What determines the valence of an atom?
Last Answer : The number of electrons in the outer shell.
Description : The way a magnetic head will be used determines how it is constructed. Name three factors that determine the final construction of a magnetic head.
Last Answer : a. Type of head (record, reproduce, or erase). b. Frequencies it will record or reproduce. c. Whether it will be used on a single or multitrack recorder.
Description : What factor determines the direction a gyro will precess in response to a particular force?
Last Answer : Direction of spin.
Description : What determines the range of wavelengths over which meaningful data is obtained for calculating the chromatic dispersion?
Last Answer : The wavelength range of the optical source(s) used.
Description : The fiber's normalized frequency (V) determines how many modes a fiber can support. As the value of V increases, will the number of modes supported by the fiber increase or decrease?
Last Answer : Increase.
Description : What determines the bandwidth of an AM transmission?
Last Answer : The highest modulating frequency.
Description : What determines the frequency of a sine wave?
Last Answer : The rate at which the vector which is generating the sine wave is rotating.
Description : What determines the phase relationship between the voltages in a two-phase ac generator?
Last Answer : Placement of armature coils.
Description : What determines the amount of slip in an induction motor?
Last Answer : Load.
Description : What determines the number of field poles required to establish a rotating magnetic field in a multiphase motor stator?
Last Answer : The number of phases in the applied voltage.
Description : If C4 were removed from the circuit, what would happen to the output of the amplifier?
Last Answer : The output would decrease. (C4 decouples R2 preventing degenerative feedback from R2.)
Description : What components form the input-signal-developing impedance for the amplifier?
Last Answer : C2 and the secondary of T1.
Description : What two methods are used to compensate for the problems that cause low gain in an rf amplifier?
Last Answer : . RF transformers are used and the transistor is neutralized.
Description : What problem is caused in an rf amplifier by a loosely coupled transformer?
Last Answer : A too-narrow bandpass.
Description : What is the most common form of coupling for an rf amplifier?
Last Answer : Transformer coupling.
Description : Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?
Last Answer : Yes.