Frequency distortion occurs when the amplitudes of the different frequency components of an input signal are changed by a factor that is not the same for all frequencies. Phase distortion occurs when there is a phase shift between a system's output- and its input-signal components.
The distortion that occurs in an instrument when the relative phases of the input signal differ from those of the output signal.
Phase Distortion in the amplifier is also known as delay distortion. As the name indicates whenever there is a time delay between input and occurrence of the signal at the output. It is said to be phase distorted signal. It occurs mainly due to electrical reactance.
Frequency distortion: This occurs when a circuit or device causes the voltage/current of different frequency components in an input signal to be modified by different amounts. This can only be seen on broadband signals. This generally occurs in filters when the magnitude of the Bode plot is nonlinear.
Amplitude distortion refers to unequal amplification or attenuation of the various frequency components of the signal, and phase distortion refers to changes in the phase relationships between harmonic components of a complex wave.
Two common types of distortion. In barrel distortion (left), magnification decreases with distance from the centre of the image; in pincushion distortion (right), magnification increases with distance.
Frequency is the number of cycles a radio wave completes in one second. For example, wireless network signals typically operate at 2.4ghz or 5ghz. Amplitude is how strong those radio frequencies are. Finally, phase is the relation that multiple radio signals have that share the same space and frequency.
Frequency response distortion
Non-flat frequency response is a form of distortion that occurs when different frequencies are amplified by different amounts in a filter. For example, the non-uniform frequency response curve of AC-coupled cascade amplifier is an example of frequency distortion.
Traditionally, most distortion units overdrive and shape the amplitude of a signal in various ways to generate a rougher sound. Phase Distortion instead lets the signal modulate the phase of itself, essentially resulting in something similar to feedback FM.
The signal received may differ from the signal transmitted. The effect will degrade the signal quality for analog signals and introduce bit errors for digital signals. There are three types of transmission impairments: attenuation, delay distortion, and noise.
Phase distortion results when different frequencies travel at different signal velocities due to dielectric dispersion in the PCB substrate. Because the dielectric constant varies with frequency, the signal velocity also varies with frequency.
Phase Distortion or Delay Distortion is a type of amplifier distortion which occurs in a non-linear transistor amplifier when there is a time delay between the input signal and its appearance at the output.
The frequency is inversely proportional to the time interval for 1 degree of phase. The frequency of a signal is given by f, and the time the (in secs) regarding one degree of phase is the = 1 / (360f) = T / 360. Therefore, a one-degree phase shift on a 5 MHz signal shows a time shift of 555 picoseconds.
There are four main types of distortion that come from map projections: distance, direction, shape and area. The Mercator projection, for example, distorts Greenland because of its high latitude, in the sense that its shape and size are not the same as those on a globe.
If the phase shift is uniform with respect to frequency, a modulated signal will not be distorted, but if the phase shift is nonlinear with respect to frequency, the output signal is distorted compared to the input.
In frequency modulation, the frequency of the carrier varies. But in Phase Modulation (PM), the phase of the carrier signal varies in accordance with the instantaneous amplitude of the modulating signal. The amplitude and the frequency of the carrier signal remains constant whereas the phase of the carrier changes.
One of the most common causes of phase problems comes from recordings of the same source made with two or more mics placed at different distances. The distance variations cause the sound to arrive at the mics (and therefore get recorded) at slightly different times.
Phase in audio refers to the position of a sound wave in time. Think of a sine wave on a graph. The wave's phase is its position along the x-axis. For a periodic waveform, the phase tells you the point along its shape where the wave's pattern begins.
Distortion brings about a change in the shape of the audio waveform, meaning the output is different from the input. If a single frequency (a test tone) is played into a system, and the output consists of multiple frequencies, there is non-linear distortion.
Distortion refers to the difference between the input and output signals through a particular system, be that difference a newly created peak, change in relative intensity of frequencies, etc.. And such distortion is detrimental to high-fi audio, where the intent is to be as faithful as possible to the original.
The term high-frequency distortion is used for distortion in the frequency range from 2 kHz up to 1 MHz.
Phase is the same frequency, same cycle, same wavelength, but are 2 or more wave forms not exactly aligned together. "Phase is not a property of just one RF signal but instead involves the relationship between two or more signals that share the same frequency.
Frequency is the number of cycles per second, with each cycle representing a unit of time. Frequency is measured in hertz (Hz) or one of its derivatives, such as kilohertz (kHz) or megahertz (MHz). Figure 1. A complete wave cycle is 360 degrees of phase or 2π radians of phase.
Note that the phase noise increases as the carrier frequency increases, while holding the same general shape of the curve.