What are the two methods used for feedback coupling?

1 Answer

Answer :

Inductive and capacitive.

Related questions

Description : What are four methods of coupling amplifier stages?

Last Answer : Direct, RC, impedance, and transformer coupling.

Description : What are two advantages of this type of coupling?

Last Answer : It uses fewer components than capacitive coupling and can provide an increase in gain.

Description : Loose or inefficient coupling of energy into or out of a waveguide can be accomplished by the use of what method?

Last Answer : Slots and apertures.

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

Last Answer : Transformer coupling.

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.

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?

Last Answer : it causes K to be less than unity (I).

Description : Is coupling loss from angular misalignment more critical in expanded beam or butt-jointed connectors?

Last Answer : Expanded beam connectors.

Description : Is coupling loss from fiber separation and lateral misalignment more critical in expanded-beam or butt-jointed connectors?

Last Answer : Butt-jointed connectors.

Description : Does coupling loss from refractive index profile difference result when the receiving fiber has a larger profile parameter

Last Answer : Fiber alignment.

Description : What is the basic fiber cleaving technique for preparing optical fibers for coupling?

Last Answer : Score-and-break.

Description : How does index matching gel affect the amount of coupling loss caused by (a) fiber separation, (b) lateral misalignment, and (c) angular misalignment?

Last Answer : (a) Reduces coupling loss, (b) does not change coupling loss, and (c) increases coupling loss

Description : What connection properties result in fiber optic connector coupling loss?

Last Answer : Poor fiber alignment and end preparation, fiber mismatches, and Fresnel reflection.

Description : In fiber-to-fiber connections, Fresnel reflection is one source of coupling losses. Light is reflected back into the source fiber and is lost. What causes Fresnel reflection?

Last Answer : A step change in refractive index that occurs at fiber joints, caused by fiber separation.

Description : Fiber-to-fiber coupling loss is affected by intrinsic and extrinsic coupling losses. Can intrinsic coupling losses be limited by limiting fiber mismatches?

Last Answer : Yes.

Description : What are the main causes of coupling loss?

Last Answer : Poor fiber end preparation and poor fiber alignment.

Description : How are source-to-fiber coupling and microbending and macrobending losses affected by changes in core diameter and D?

Last Answer : Coupling efficiency increases with both core diameter and D, while bending losses increase directly with core diameter and inversely with D.

Description : In a circuit using grid-leak biasing, the coupling capacitor (Cc) chargcharge path?

Last Answer : rkg, the cathode to grid resistance.

Description : What is meant by the coefficient of coupling?

Last Answer : The ratio of the fines of force produced by one coil to the lines of force that link another coil. It is never greater than one.

Description : Will fiber coupling loss generally increase or decrease if the mode field diameter of a single mode fiber is decreased?

Last Answer : Increase.

Description : As the core and cladding modes travel along the fiber, mode coupling occurs. What is mode coupling?

Last Answer : Mode coupling is the exchange of power between two modes.

Description : What type of coupling is most effective at high frequencies?

Last Answer : Impedance coupling.

Description : What type coupling would be most useful for an audio amplifier between the first and second stages?

Last Answer : RC coupling.

Description : What type coupling is usually used to couple the output from a power amplifier?

Last Answer : Transformer coupling.

Description : . What is the most common form of coupling?

Last Answer : RC coupling.

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

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

Description : Which of the following methods cannot be used to increase the bandwidth for cascaded RF amplifier stages? A) Wave traps in each stage B) Stagger tuning C) A shunt damping resistor across each tuned circuit D) Doubled tuned transformers with tighter coupling

Last Answer : A) Wave traps in each stage

Description : A two-cavity klystron without a feedback path will operate as what type of circuit?

Last Answer : Amplifier.

Description : What type of feedback is usually caused by the base-to collector interelectrode capacitance?

Last Answer : Degenerative or negative

Description : What type of feedback is usually caused by interelectrode capacitance?

Last Answer : Negative (degenerative) feedback

Description : In the inverting configuration, the input signal is applied to the (a) (inverting, noninverting) input and the feedback signal is applied to the (b) (inverting, noninverting) input.

Last Answer : a. Inverting. b. Inverting.

Description : select the correct response from the choices given in the parentheses. Q-20. In a closed-loop configuration the output signal is determined by (the input signal, the feedback signal, both).

Last Answer : Both the input signal and the feedback signal.

Description : In a typical velocity servo block diagram what device is placed in the feedback loop that is not present in the position servo?

Last Answer : Tachometer.

Description : Which components provide the regenerative feedback signal in the phase-shift oscillator?

Last Answer : Resistor-capacitor networks.

Description : Which oscillator uses tapped capacitors for feedback?

Last Answer : Colpitts.

Description : Which oscillator uses a tapped inductor for feedback?

Last Answer : Hartley.

Description : Which oscillator uses a tickler coil for feedback?

Last Answer : Armstrong.

Description : What type of feedback aids an input signal?

Last Answer : Regenerative or positive

Description : A teacher in a classroom has immediate control over (A) the self, selected methods of communication and the message. (B) the audience, the noise and the reception. (C) the feedback, the technology and the audience experience. (D) the communication channel, other communicators, and external factors.

Last Answer : (A) the self, selected methods of communication and the message.

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 are the two basic methods of scanning?

Last Answer : Mechanical and electronic.

Description : What are the two methods used by fiber manufacturers to fabricate multimode and single mode glass fibers?

Last Answer : Vapor phase oxidation and direct-melt process.

Description : What two methods are used to couple energy into and out of magnetrons?

Last Answer : Loops and slots.

Description : What two methods of manufacture are being used to eliminate bonding wires?

Last Answer : Flip-chip, beam lead

Description : What are the two emi transmission methods?

Last Answer : . Conduction and radiation.

Description : Two methods describe how light propagates along an optical fiber. These methods define two theories of light propagation. What do we call these two theories?

Last Answer : The ray theory and the mode theory.

Description : What are two methods used to damp a meter movement?

Last Answer : As the coil moves through the field of the permanent magnet, a current is induced in the coil opposing the movement of the coil; and a vane can be attached to the coil and placed in the airtight chamber so that the movement of the vane opposes the movement of the coil.

Description : In a galvanometer, what two methods are used to indicate the amount of coil rotation?

Last Answer : The pointer arrangement and the light and mirror arrangement.

Description : In a galvanometer, what two methods are used to indicate the amount of coil rotation?

Last Answer : he pointer arrangement and the light and mirror arrangement.

Description : Name two methods of oscillator keying.

Last Answer : Plate keying and cathode keying.