What is meant by phase discriminator?
What is meant by phase discriminator?
an electronic circuit that converts a frequency or phase modulation into an amplitude modulation for subsequent demodulation.
What are the types of phase discriminator?
There are two classes of phase detectors: a linear phase detector, in which the transfer function is somewhat linear between the output and the input phase error, as shown in Figure 4.41(A), and a binary phase detector (or bang-bang phase detector), in which only the sign of the phase error is extracted, as shown in …
What is phase detector in PLL?
A phase detector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a signal which represents the difference in phase between two signal inputs. The phase detector is an essential element of the phase-locked loop (PLL).
What are 3 running conditions in PLL?
Thus, a PLL goes through three stages (i) free running, (ii) capture and (iii) locked or tracking.
What is the another name of phase discriminator?
This Phase Discriminator is also known as the center-tuned discriminator or the Foster-Seeley discriminator, after its inventors.
What does discriminator mean?
: one that discriminates especially : a circuit that can be adjusted to accept or reject signals of different characteristics (such as amplitude or frequency)
What is the other name for phase discriminator?
What is Zcd?
A zero-crossing detector or ZCD is one type of voltage comparator, used to detect a sine waveform transition from positive and negative, that coincides when the i/p crosses the zero voltage condition. The applications of the Zero Crossing Detector are phase meter and time marker generator.
What is PLL phase noise?
Phase noise consists of small random perturbations in the phase of the signal, i.e. phase jitter. These perturbations are effectively phase modulation and as a result, noise sidebands are generated. These spread out either side of the main signal and can be plotted on a spectrum analyzer as single sideband phase noise.
What causes phase noise?
What Is Phase Noise? Phase Noise is represented in the frequency domain of a waveform and consists of rapid, short-term, random fluctuations in the phase (frequency). This is caused by time domain instabilities (jitter).
Can be used as a phase detector in PLL?
The more complex digital phase-frequency detectors usually have an output that allows a reliable indication of an out of lock condition. An XOR gate is often used for digital PLLs as an effective yet simple phase detector.
What is phase margin in PLL?
In electronic amplifiers, the phase margin (PM) is the difference between the phase lag φ (< 0) and -180°, for an amplifier’s output signal (relative to its input) at zero dB gain – i.e. unity gain, or that the output signal has the same amplitude as the input.
