What is the purpose of the pump in a parametric amplifier?

What is the purpose of the pump in a parametric amplifier?
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1 Answer

Answer :

Supplies the electrical energy required to vary the capacitance.
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Related questions

In a nondegenerative parametric amplifier the difference between the input frequency and the pump frequency is called what?

Description : In a nondegenerative parametric amplifier the difference between the input frequency and the pump frequency is called what?

Last Answer : Idler- or lower-sideband frequency.

What is the primary difference between the pump signal of a simple parametric amplifier and the pump signal of a nondegenerative parametric amplifier?

Description : What is the primary difference between the pump signal of a simple parametric amplifier and the pump signal of a nondegenerative parametric amplifier?

Last Answer : The pump signal of a nondegenerative parametric amplifier is higher than twice the input signal.

The pump signal frequency must be of what value when compared to the input signal of a simple parametric amplifier?

Description : The pump signal frequency must be of what value when compared to the input signal of a simple parametric amplifier?

Last Answer : Exactly double the input frequency.

What is the most important feature of the parametric amplifier?

Description : What is the most important feature of the parametric amplifier?

Last Answer : The low-noise characteristic.

The underlying principle of operation of the parametric amplifier is based on what property?

Description : The underlying principle of operation of the parametric amplifier is based on what property?

Last Answer : Reactance.

What is the output frequency of an upper-sideband parametric-frequency converter?

Description : What is the output frequency of an upper-sideband parametric-frequency converter?

Last Answer : The sum of the input frequency and the pump frequency.

What is the purpose of a frequency-determining network in an rf amplifier?

Description : What is the purpose of a frequency-determining network in an rf amplifier?

Last Answer : To provide maximum impedance at the desired frequency.

What is the purpose of the rectifier in a magnetic amplifier?

Description : What is the purpose of the rectifier in a magnetic amplifier?

Last Answer : The rectifier eliminates hysteresis loss.

What is the purpose of the buffer amplifier?

Description : What is the purpose of the buffer amplifier?

Last Answer : Reduce interaction between oscillator and load.

What is the purpose of the circulator in a tunnel-diode amplifier?

Description : What is the purpose of the circulator in a tunnel-diode amplifier?

Last Answer : Prevent feedback to the tuned input circuit.

What is the purpose of an amplifier-coupling network?

Description : What is the purpose of an amplifier-coupling network?

Last Answer : To transfer energy (a signal) from one stage to another.

Where online can I learn about parametric functions?

Description : Where online can I learn about parametric functions?

Last Answer : http://www.tutorvista.com/math/study-types-of-differentiation

……… are also called as parametric subroutines a.Micro b.Macro c.Sub Macro d.Sub Micro

Description : ……… are also called as parametric subroutines a.Micro b.Macro c.Sub Macro d.Sub Micro

Last Answer : b.Macro

Which of the following is not a method to describe a curve mathematically? a.Explicit form b.Laplace form c.Implicit form d.Parametric form

Description : Which of the following is not a method to describe a curve mathematically? a.Explicit form b.Laplace form c.Implicit form d.Parametric form

Last Answer : b.Laplace form

Find parametric equation for Y-coordinates of Hermite cubic spline curve having endpoints P0[4,4]; P1[8,5] a.2u3-3u2+2u+4 b.3u3-2u2-2u-4 c.2u3-3u2-2u-4 d.2u3+3u2+2u+4

Description : Find parametric equation for Y-coordinates of Hermite cubic spline curve having endpoints P0[4,4]; P1[8,5] a.2u3-3u2+2u+4 b.3u3-2u2-2u-4 c.2u3-3u2-2u-4 d.2u3+3u2+2u+4

Last Answer : a.2u3-3u2+2u+4

Find parametric equation for X-coordinates of hermite cubic spline curve having endpoints P0[4,4]; P1[8,5] a.-5u3+8u2+u+1 b.5u3+8u2+u+1 c.8u3-5u2-u+1 d.8u3+5u2+u+1

Description : Find parametric equation for X-coordinates of hermite cubic spline curve having endpoints P0[4,4]; P1[8,5] a.-5u3+8u2+u+1 b.5u3+8u2+u+1 c.8u3-5u2-u+1 d.8u3+5u2+u+1

Last Answer : a.-5u3+8u2+u+1

Parametric equation for circle a.X=x+Rcosu; Y=y+Rsinu; Z=z b.X=Rcosu; Y=Rsinu; Z=z c.X=x+Rsinu; Y=y+Rcosu; Z=z d.X=Rsinu; Y=y+Rcosu; Z=z

Description : Parametric equation for circle a.X=x+Rcosu; Y=y+Rsinu; Z=z b.X=Rcosu; Y=Rsinu; Z=z c.X=x+Rsinu; Y=y+Rcosu; Z=z d.X=Rsinu; Y=y+Rcosu; Z=z

Last Answer : a.X=x+Rcosu; Y=y+Rsinu; Z=z

Two lines L1 and L2 having Parametric equations are P1=[3 4 7]+u[2 2 -6] and P2=[15 -2]+u[1 4 2]. Tangent vector for line L1 a.2i+2j-6k b.2i+2j+6k c.2i-2j-6k d.6-2j-2k

Description : Two lines L1 and L2 having Parametric equations are P1=[3 4 7]+u[2 2 -6] and P2=[15 -2]+u[1 4 2]. Tangent vector for line L1 a.2i+2j-6k b.2i+2j+6k c.2i-2j-6k d.6-2j-2k

Last Answer : a.2i+2j-6k

Write parametric equation of line having end points P1(3,5,8) and P2 (6,4,3). a.[3 5 8]+u[3 -1 -5] b.[3 5 8]+u[3 1 5] c.[3 8 5]+u[3 -1 -5] d.[3 5 8]+u[-3 1 5]

Description : Write parametric equation of line having end points P1(3,5,8) and P2 (6,4,3). a.[3 5 8]+u[3 -1 -5] b.[3 5 8]+u[3 1 5] c.[3 8 5]+u[3 -1 -5] d.[3 5 8]+u[-3 1 5]

Last Answer : a.[3 5 8]+u[3 -1 -5]

What is a parametric test ?

Description : What is a parametric test ?

Last Answer : In this case, the value of the aggregate parameter is assumed to be a value of aggregate parameters. Later it is checked whether the conjecture is true or false. This method of verifying hypotheses is called ... tests in the parametric test are Z test , T test , Ky -square test and F test.

What is a parametric test ?

Description : What is a parametric test ?

Last Answer : In this case, the value of the aggregate parameter is assumed to be a value of aggregate parameters. Later it is checked whether the conjecture is true or false. This method of verifying hypotheses is called parametric testing.

How do you compare parametric and non-parametric analysis?

Description : How do you compare parametric and non-parametric analysis?

Last Answer : In parametric analysis the underlying distributions of thevariables are described by parameters. These may be known or it maybe possible to estimate them from the observed data. Innon-parametric analyses, ... not used - eitherbecause they cannot be derived or because the tests do not requirethem.

What should I know about parametric equalizers?

Description : What should I know about parametric equalizers?

Last Answer : Parametric equalizers are electronic devices which let a person adjust the level and frequency of a sound. These devices are used by audio engineers in sound recordings.

Considers the total cost of ownership, or development plus support costs, for a project. A. Learning Curve Theory B. Life Cycle Costing C. Parametric Modeling D. Rate of Performance

Description : Considers the total cost of ownership, or development plus support costs, for a project. A. Learning Curve Theory B. Life Cycle Costing C. Parametric Modeling D. Rate of Performance

Last Answer : B. Life Cycle Costing

Which one of the following is not a non-parametric test ? (A) t-test (B) Sign test (C) Chi-square test (D) Run test

Description : Which one of the following is not a non-parametric test ? (A) t-test (B) Sign test (C) Chi-square test (D) Run test

Last Answer : Answer: A

The importance of the correlation co-efficient lies in the fact that: (A) There is a linear relationship between the correlated variables. (B) It is one of the most valid measure of statistics. (C) It allows one to determine the degree or strength of the association be tween two variables. (D) It is a non-parametric method of statistical analysis.

Description : The importance of the correlation co-efficient lies in the fact that: (A) There is a linear relationship between the correlated variables. (B) It is one of the most valid measure of statistics. ... of the association be tween two variables. (D) It is a non-parametric method of statistical analysis.

Last Answer : (C) It allows one to determine the degree or strength of the association be tween two variables.

If C4 were removed from the circuit, what would happen to the output of the amplifier?

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.)

What components form the input-signal-developing impedance for the amplifier?

Description : What components form the input-signal-developing impedance for the amplifier?

Last Answer : C2 and the secondary of T1.

What two methods are used to compensate for the problems that cause low gain in an rf amplifier?

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.

What problem is caused in an rf amplifier by a loosely coupled transformer?

Description : What problem is caused in an rf amplifier by a loosely coupled transformer?

Last Answer : A too-narrow bandpass.

What is the most common form of coupling for an rf amplifier?

Description : What is the most common form of coupling for an rf amplifier?

Last Answer : Transformer coupling.

Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?

Description : Can a parallel LC circuit be used as the frequency determining network for an rf amplifier?

Last Answer : Yes.

If the output impedance of an amplifier circuit is decreased, what is the effect on the gain?

Description : If the output impedance of an amplifier circuit is decreased, what is the effect on the gain?

Last Answer : The gain decreases.

If the input-signal-developing impedance of an amplifier is increased, what is the effect on the gain?

Description : If the input-signal-developing impedance of an amplifier is increased, what is the effect on the gain?

Last Answer : The gain increases.

What component in an amplifier circuit tends to limit the low-frequency response of the amplifier?

Description : What component in an amplifier circuit tends to limit the low-frequency response of the amplifier?

Last Answer : The coupling capacitor (C3).

What components can be used to increase the high frequency response of an amplifier?

Description : What compone What components What components can be used to increase the high frequency response of an amplifier?

Last Answer : Peaking coils.

What is the major factor that limits the high-frequency response of an amplifier circuits?

Description : What is the major factor that limits the high-frequency response of an amplifier circuits?

Last Answer : The capacitance of the circuit.

What are the factors that limit the frequency response of a transistor amplifier?

Description : What are the factors that limit the frequency response of a transistor amplifier?

Last Answer : The capacitance and inductance of the circuit and the interelectrode capacitance of the transistor.

If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?

Description : If current gain is required from an rf amplifier, what type of component should be used as an output coupling element?

Last Answer : A step-down transformer.

What are the upper and lower frequency limits of an amplifier?

Description : What are the upper and lower frequency limits of an amplifier?

Last Answer : The half-power points of a frequency-response curve. The upper and lower limits of the band f frequencies for which the amplifier is most effective.

What is the bandwidth of an amplifier?

Description : What is the bandwidth of an amplifier?

Last Answer : The difference between the upper and lower frequency limits of an amplifier.

When is degeneration tolerable in an amplifier?

Description : When is degeneration tolerable in an amplifier?

Last Answer : When it is necessary to prevent amplitude distortion.

In the basic transistor amplifier discussed earlier, what is the relationship between the polarity of the input and output signals?

Description : In the basic transistor amplifier discussed earlier, what is the relationship between the polarity of the input and output signals?

Last Answer : The signals are opposite in polarity or 180 degrees out of phase with each other.

What amplifier class of operation is the most inefficient but has the least distortion?

Description : What amplifier class of operation is the most inefficient but has the least distortion?

Last Answer : Class A.

What two primary items determine the class of operation of an amplifier?

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

The input and output signals of a JFET amplifier have what phase relationship?

Description : The input and output signals of a JFET amplifier have what phase relationship?

Last Answer : They are 180 degrees out of phase.

What is used to bias a magnetic amplifier so that the control winding remains free to accept control (input) signals?

Description : What is used to bias a magnetic amplifier so that the control winding remains free to accept control (input) signals?

Last Answer : A bias winding and associated circuitry.

At what portion of the magnetization curve should a magnetic amplifier be operated?

Description : At what portion of the magnetization curve should a magnetic amplifier be operated?

Last Answer : . The knee of the curve.

What is the basic principle of a magnetic amplifier?

Description : What is the basic principle of a magnetic amplifier?

Last Answer : change in inductance in a series LR circuit causes a change in true power.

What is the frequency classification of a magnetic amplifier

Description : What is the frequency classification of a magnetic amplifier

Last Answer : An audio (or low) frequency power amplifier.