Which oscillator uses tapped capacitors for feedback?

1 Answer

Answer :

Colpitts.

Related questions

Description : Which oscillator uses a tapped inductor for feedback?

Last Answer : Hartley.

Description : An oscillator that uses a tapped coil to obtain the feedback is called: a. A Hartley circuit b. A Pierce circuit c. A multivibrator d. A negative feedback circuit

Last Answer : An oscillator that uses a tapped coil to obtain the feedback is called: a. A Hartley circuit b. A Pierce circuit c. A multivibrator d. A negative feedback circuit 

Description : Which oscillator uses a tickler coil for feedback?

Last Answer : Armstrong.

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

Last Answer : Resistor-capacitor networks.

Description : What transmission method uses a stable cw reference oscillator, which is locked in phase with the transmitter frequency?

Last Answer : Pulse-Doppler.

Description : When a transmitter uses a high-power oscillator to produce the output pulse, what switches the oscillator on and off?

Last Answer : High-voltage pulse from the modulator.

Description : Which of the following best describes a dip-meter? A. An SWR meter B. A counter C. A variable LC oscillator with metered feedback current D. A field strength meter

Last Answer : C. A variable LC oscillator with metered feedback current

Description : Best described a dip-meter. A. A variable LC oscillator with metered feedback current B. An SWR meter C. A counter D. A field strength meter

Last Answer : A. A variable LC oscillator with metered feedback current

Description : The major function of transistor. Q2 is A) It provides voltage gain B) It provides the feedback signal C) It isolates the oscillator from loading effects D) It provides a phase shift.

Last Answer : ) It provides a phase shift.

Description : Which of the following is not true: A) An oscillator is a circuit that converts DC to AC B) An oscillator is an amplifier that supplies its own input signal C) All oscillators generate sine waves D) In phase feedback is called positive Feedback

Last Answer : C) All oscillators generate sine waves

Description : State type of feedback used for oscillator circuit. Explain Barkhausen criteria.

Last Answer : Concept of feedback: Feedback is process to fed back part of output to the input. Feed back concept is introduced in amplifier to improve the parameters of amplifier like voltage gain, current gain ... signal  d) Voltage shunt: Output signal is voltage signal, feedback signal is current signal. 

Description : Positive feedback is used in 1. Amplifier 2. Rectifier 3.Oscillator 4. Detector 

Last Answer : Positive feedback is used in 1. Amplifier 2. Rectifier 3.Oscillator 4. Detector 

Description : Feedback factor at the frequency of oscillation of a Wien bridge oscillator is:  (1) 3 (2) 1/3 (3) 1/29 (4) 3/29

Last Answer : Feedback factor at the frequency of oscillation of a Wien bridge oscillator is: 1/3.

Description : Before working on electrical equipment containing capacitors, what should you do to the capacitors?

Last Answer : Discharge them by shorting them to ground.

Description : What effect does an increase in capacitance have on a capacitor’s opposition to current flow?

Last Answer : Opposition to current flow decreases.

Description : What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?

Last Answer : Shorting probe.

Description : Why are synchro capacitors placed physically close to differentials transmitters and CTs?

Last Answer : To keep the connections as short as possible in order to maintain system.

Description : How are synchro capacitors connected in a circuit?

Last Answer : They are delta-connected across the stator windings.

Description : What type of current is eliminated by synchro capacitors?

Last Answer : Magnetizing current.

Description : What type of synchros usually require the use of synchro capacitors?

Last Answer : TDXs, CDXs, and Cts.

Description : In a full-wave voltage doubler, are the capacitors connected in series or in parallel with the output load?

Last Answer : In parallel.

Description : Why is the use of large value capacitors in filter circuits discouraged?

Last Answer : Expense

Description : Why is the use of large value capacitors in filter circuits discouraged?

Last Answer : Expense

Description : Examine the three capacitors shown below. What is the capacitance of each?

Last Answer : a. 26µF or 260,00pF b. 630pF c. 9600pF

Description : Charged capacitors can kill. True or false?

Last Answer : True.

Description : What component in a blocking oscillator controls pulse width?

Last Answer : Transformer.

Description : What signal is used to synchronize the coherent oscillator to a fixed phase relationship with the transmitted pulse?

Last Answer : Coho lock pulse.

Description : What is the primary advantage of power-amplifier transmitters over keyed-oscillator transmitters?

Last Answer : Frequency stability.

Description : Name a disadvantage of sine-wave oscillator synchronizers.

Last Answer : It requires additional shaping circuits.

Description : What basic circuits meet the requirements of an externally synchronized master oscillator?

Last Answer : Sine-wave oscillator, single-swing blocking oscillator, and master trigger (astable) multivibrator.

Description : What is the primary advantage of power-amplifier transmitters over keyed-oscillator transmitters?

Last Answer : Frequency stability.

Description : Name a disadvantage of sine-wave oscillator synchronizers.

Last Answer : . It requires additional shaping circuits.

Description : What basic circuits meet the requirements of an externally synchronized master oscillator?

Last Answer : Sine-wave oscillator, single-swing blocking oscillator, and master trigger (astable) multivibrator.

Description : What type of multivibrator can be used as a radar master oscillator?

Last Answer : Free-running.

Description : What is the polarity of the first alternation of the tank circuit in an emitter-loaded npn pulsed oscillator?

Last Answer : Negative

Description : Why is a high-gain transistor used in the phase-shift oscillator?

Last Answer : Because of the losses encountered in the RC networks.

Description : What is the identifying feature of a Colpitts oscillator?

Last Answer : Split capacitors.

Description : What is the difference between the series-fed and the shunt-fed Hartley oscillator?

Last Answer : In the series-fed Hartley oscillator, dc flows through the tank circuit.

Description : What is the main difference between the Armstrong oscillator and the Hartley oscillator?

Last Answer : Feedback coil. Armstrong uses a separate coil. Hartley uses a tapped coil.

Description : In a heterodyne-type frequency meter, what is the difference between the oscillator frequency and the unknown frequency?

Last Answer : Beat frequency.

Description : What characteristic of a gunn oscillator is inversely proportional to the transit time of the domain across the semiconductor?

Last Answer : The frequency.

Description : Why is the tunnel diode loosely coupled to the cavity in a tunnel-diode oscillator?

Last Answer : To increase the stability.

Description : What determines the frequency of a tunnel-diode oscillator?

Last Answer : The tuned circuit or cavity frequency.

Description : In an fm transmitter, when does an oscillator generate only a steady frequency?

Last Answer : When no modulation is present.

Description : What is the function of the oscillator in a cw transmitter?

Last Answer : It generates an rf carrier at a given frequency within required limits.

Description : Name two methods of oscillator keying.

Last Answer : Plate keying and cathode keying.

Last Answer : Uses of ceramic capacitors is as follows :The ceramic capacitor is use in DC to DC converter.The ceramic capacitor is use with band pass and band stop filter.Ceramic capacitor ... The ceramic capacitor is uses in high frequency circuits.Ceramic capacitors are use for biasing applications.

Description : An oscillator that uses crystal control should be A) Frequency stable B) useful only at low frequencies C) AVFO D) none of the above.

Last Answer : A) Frequency stable

Description : The basic Hartley oscillator uses: (1) One inductor and two capacitors (2) A centre tapped inductor and a capacitor (3) Two capacitors (4) Tickler coil 

Last Answer : The basic Hartley oscillator uses: A centre tapped inductor and a capacitor

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

Last Answer : Degenerative or negative