849N202CKI-000LFT

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Clock Generators, PLLs, and Frequency Synthesizers are three related but distinct fields of electronics and technology. Each of these technologies serve different applications and have distinct working principles.

A clock generator is a device typically used to provide a source of synchronous clock signals for subsystems within a larger system. It consists of an oscillator and adivider circuit, usually a digital counter, to generate multiple frequencies from a single source. It is a popular choice for applications that require precise timing control such as microcontroller systems, digital signal processors and communication systems. The oscillator consists of an active device such as a transistor, and its frequency is determined by its frequency-determining components like resistors and capacitors. In its simplest form, the clock generator can be used as a basic divider circuit to generate slower clock frequencies from higher-speed sources.

PLLs, or Phase Locked Loops, are more advanced and are used to electronically measure and compare the phase of signals and then automatically adjust in order to maintain phase synchronization between different signals. A basic PLL configuration consists of an oscillator, a phase comparator, a voltage-controlled oscillator (VCO) and control circuitry. The PLL compares the phase of the computed frequency with the phase of the reference signal. If there is any mismatch, the PLL adjusts its VCO accordingly, so that the phase matches the reference signal. The advantage of PLLs is that they can simultaneously track multiple signals and maintain synchronization over a wide range of frequencies.

Frequency Synthesisers, on the other hand, are a type of electronic circuit used to generate signals at frequencies higher than those provided by a single oscillator. While a single oscillator can only generate a specific frequency, frequency synthesizers combine a number of oscillators to generate a wider range of frequencies. Frequency synthesizers typically use two or more oscillators, each of which is capable of generating a set of frequencies. These are then combined to produce a wide range of frequencies. This process is called frequency multiplication and is used to generate signals for applications such as radio, television and audio communications.

The 849N202CKI-000LFT is a frequency synthesizer designed for applications that require wide-frequency synthesis, such as radio, television, and communication systems. It is composed of an integrated circuit (IC) package and a crystal oscillator. The IC consists of two programmable oscillators, one for the reference frequency source, and one for the frequency synthesis operations. The reference oscillator can be tuned to match the frequency desired. The second oscillator is then used to create the desired frequencies at a much higher resolution. The 849N202CKI-000LFT features a low-power consumption and a small package size, making it suitable for applications such as cell phones, tablets, and other space-constrained applications.

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