What is LM565?
LM565 is a general purpose PLL (Phase Locked Loop) IC designed for demodulation, frequency multiplication and frequency division. The device mainly consists of two components, one is voltage controller oscillator and other is phase detector.
What is PLL and VCO?
A phase-locked loop (PLL) circuit is a feedback system that combines a voltage controlled oscillator (VCO) and a phase detector in such a way that the oscillator signal tracks an applied frequency or phase modulated signal with the correct frequency and phase. The VCO generates the output signal.
What is free running VCO?
The VCO is a special type of oscillator that has a frequency controlled by an applied voltage. The frequency of the VCO without any control signal applied is called the free- running frequency, f0.
What is maximum free running frequency of VCO for PLL 565?
The PLL IC 565 is usable over the frequency range 0.1 Hz to 500 kHz. It has highly stable centre frequency and is able to achieve a very linear FM detection. The output of VCO is capable of producing TTL compatible square wave.
Which IC used in PLL?
IC 565. The purpose of each pin is self-explanatory from the above diagram. Out of 14 pins, only 10 pins (pin number 1 to 10) are utilized for the operation of PLL.
Which type of filter is used in PLL?
(b) PLL capture performance PLL with a 5th-order Butterworth filter.
What is PLL used for?
The PLL is widely used for a variety of purposes. It is used to recover the clock signal in some wireless applications. It is used to recover the original signal in frequency modulation radio. It is used to multiply a frequency by a fixed factor.
What does PLL stand for?
PLL
| Acronym | Definition |
|---|---|
| PLL | Phase-Locked Loop |
| PLL | Parts List (TMINS) |
| PLL | Polskie Linie Lotnicze (Polish Airways) |
| PLL | Pretty Little Liars (TV show) |
How is VCO measured?
The system is calibrated by measuring the insertion loss of the RF path from A to E as a function of frequency. These insertion loss measurements are used to compute the actual output power of the VCO. The VCO frequency is changed by changing the tuning voltage.
What is the conversion ratio of the phase detector in 565 PLL?
Explanation: The conversion ratio of the phase detector of 565 PLL (Monolithic PLL) Kφ = 1.4/π = 0.4458.
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 does a VCO do?
VCOs are used in synthesizers to generate a waveform whose pitch can be adjusted by a voltage determined by a musical keyboard or other input. A voltage-to-frequency converter (VFC) is a special type of VCO designed to be very linear in frequency control over a wide range of input control voltages.
What kind of IC is the lm565?
LM565 is a general purpose PLL (Phase Locked Loop) IC designed for demodulation, frequency multiplication and frequency division. The device mainly consists of two components, one is voltage controller oscillator and other is phase detector.
What do you need to know about the lm565 phase locked loop?
General Description The LM565 and LM565C are general purpose phase locked loops containing a stable, highly linear voltage controlled os- cillator for low distortion FM demodulation, and a double bal- anced phase detector with good carrier suppression.
How does PLL with lm565 circuit work?
We can probe this voltage level from the 7th pin of LM565. The product detector creates an output signal which is proportional to the phase difference rather than to the difference of both frequencies. Nevertheless, pull-in of the PLL occurs also when both frequencies are different.
What is the function of a 14 pin lm565?
LM565 is a 14 pin device and the function of each pin is stated below. Power supply current: 12.5mA LM565 is basically used in applications where a PLL is required, such as FM demodulation and Signal frequency divider or multiplier.