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Does higher frequency mean higher power?
Higher frequency does not mean more power. There is no magic photon pump that you can just tune to higher frequency and get the same number of photons per second and hence higher power.
What is frequency of an oscillator?
Oscillators are often characterized by the frequency of their output signal: An audio oscillator produces frequencies in the audio range, about 16 Hz to 20 kHz. An RF oscillator produces signals in the radio frequency (RF) range of about 100 kHz to 100 GHz.
Is power affected by frequency?
When you get into motors, transformers, and other non-resistive loads, the power may vary with frequency. It can certainly affect power. Reactive elements will take more or less (reactive) power with changes in frequency.
Why does Active Power depend on frequency?
Frequency of an electric system depends on the active power balance. If a generation-load active power imbalance occurs, the frequency will either increase or decrease, thus moving away from its nominal operating value. In order to control the frequency the active power balance must be restored.
Does changing frequency affect power?
How is a frequency modulated oscillator built?
An oscillator can be built using LC (inductor-capacitor) tank circuit. When we vary the capacity of the capacitor in LC tank circuit then the frequency of the oscillator will vary according to capacitance change. The idea of this modulator is by employing a varactor (voltage-dependent variable capacitor) in the LC tank circuitry.
Which is an oscillator used for Automatic Frequency Control?
Many applications require an oscillator circuit the output frequency of which is variable by a voltage input. This is called a voltage controlled oscillator (VCO). VCOs are used in the automatic frequency control (AFC) of radio and TV receivers and in electronic test equipment.
How are voltage and frequency related in FM demodulator?
Fig. 2.29. Voltage/frequency relationships in an ideal FM demodulator. This technique is widely used, especially in the case of receivers where the tuning is performed by the application of a voltage to one or more varicap diodes, and which, in consequence, lends itself well to the super-imposition of an additional AFC voltage.
How is the capacitance of an oscillator controlled?
As the capacitance is controlled by a voltage level, then it can be controlled using audio signal from microphone. A signal from direct microphone output will be too small, so we need a pre-amp before feeding the signal to this circuit.