The clever part of a PLL can be found in how it looks at the phase of two signals. For signals to be totally in phase, they must be at the same frequency and also must ebb and peak at the same point.

Basics The basic idea is simple. A PLL uses a crystal oscillator, but it isn’t the main output. The primary output is from an adjustable oscillator, usually a voltage-controlled oscillator (VCO).

IC designer Don Sauer saw my blog about the difficulties of simulating PLLs and sent me a SPICE file (zip) of a basic PLL that you can play with. Don writes: I have a simple spice netlist for a PLL ...

The Agilent 86100CU-400 PLL and jitter spectrum measurement software is a free application that makes fast, accurate, and repeatable PLL measurements using a precision jitter source and receiver. This ...

We use our Phase Noise Analysis Procedure and Specific PLL Block Diagram & Phase Noise Propagation Model (Fig. 8, Part 2) for our analysis, which is done at five outputs: 8-9-10-11-12 GHz.

Radiation-hardened phase-locked loop (PLL) circuits represent a critical advancement in safeguarding electronic systems against the deleterious effects of ionising radiation.

Technical terms [1] Phase-locked loop (PLL): A control system used as a basic component of many radio, wireless and telecommunication technologies.

How to produce the lowest phase noise at a PLL output. A standard design procedure for a typical Type 2, second-order loop. Phase-locked loops (PLLs) are ubiquitous in today’s high-tech world.