291PGLFT

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Clock Generators, PLLs, Frequency Synthesizers all work using the same principle to produce, regulate and synchronize digital signals. The technology is known as the Programmable Glitch-Free Logic-Frame-Time (PGLFT)—often known as simply 291PGLFT. 291PGLFT technology is based on an over-sampling digital signal processing concept, which produces an output clock synchronized with a digitally filtered version of an input signal. The PGLFT offers great levels of performance, far beyond the capabilities of traditional techniques.

291PGLFT Application Field

The 291PGLFT-based system is most suitable for a wide range of low-frequency applications, where the system clock must be synchronized with a reference clock, such as in communication systems, telecommunications, audio and video systems, medical electronics, network-synchronizing, and military applications. The low-frequency application can include audio and data clock synchronization, system wide-synchronization, remote and local clock distribution, clock skew adjusting, timing compensation, clock contention, and frequency stabilization.

Working Principle of the 291PGLFT

The principle of operation for 291PGLFT is digital filtering of the clock frequency with higher sample rates, accurate timing delay and phase-shifting, and extremely fast switching at the reference clock level. The digital filter works by delaying the reference clock by a small amount. The output clock frequency then is “sliced” into smaller “windows” of time, and its edges accurately synchronized with the reference clock. The output clock frequency is synchronized with the reference frequency by the selection of very small integer periods, called “driving”. These fast edges allow an extremely fast switching rate over the reference frequency.

In addition to this, the PGLFT also includes filters to control jitter of the output clocks, which helps to reduce interference that otherwise could cause product instability. The PGLFT also includes an oscillator and a multiplexer to sample the reference frequency at certain time intervals, thus providing a well-defined jitter characteristic to ensure product integrity.

The PGLFT system is very efficient due to its low-level logic, high-performance digital filters, and the possibility of using the output clock for multiple applications. The combination of the digital filter and the programmable logic allows very tight control over the cycle-by-cycle characterization of the output clock, allowing the output clock to be set to the exact frequency of the reference clock, thus providing greater system accuracy and performance.

Conclusion

The 291PGLFT technology is an advanced method of generating and synchronizing digital signals with a consistently high level of accuracy and reliability. This technology enables the user to generate, regulate, and synchronize digital signals with high precision and accuracy, compared to traditional methods. Also, by using the output clock for multiple purposes, this technology provides greater system accuracy and performance.

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