501GILFT

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The 501GILFT (Gill Frequency Tripler) application field and working principle can be used in a wide range of applications. The device is used to generate a doubling of frequency, typically used in digital radio communication devices and can be used for frequency synthesis of up to 8.5GHz. Lower frequecy applications such as clock genereration are also possible.

The device works by taking an external reference frequency and multiplying it by an integer multiple. In this case the external reference frequency is multiplied by three, hence providing a low frequency tripling. This tripling enables the use of higher frequencies without the need for a high power external reference oscillator. Using an on-chip phase detector and a voltage-controlled oscillator (VCO), allows for a phase-locked loop (PLL) to be formed, allowing the 501GILFT to track external reference frequencies of up to 8.5GHz with a wide range of phase differences.

The device is also versatile as it includes a wide range of integrated functions useful for clock and frequency generation. These include an input/output slicer, phase detector, VCO, 3-2 step multiplication circuitry, and a lock to frequency detection circuit. The input/output slicer allows the 501GILFT to operate multiple frequency inputs, phase difference ranges, and voltages. The phase detector ensures accurate frequency multiplication for high phase differences, meaning that the device can lock to a wide range of reference signals. The VCO provides the oscillator for the frequency tripling process and helps to ensure that the device locks easily, and the 3-2 step multiplication circuitry divides the frequency as adding or subtracting frequency information from the output.

The lock to frequency detection circuit tells the system if the 501GILFT is in lock or not and provides useful feedback. This allows the device to accurately track external reference frequencies with a wide range of phase differences and provides the tight frequency performance that the device is renowned for.

The 501GILFT application field and working principle are a great example of the use of modern frequency synthesization techniques. With its wide range of integrated functions, it enables the user to accurately track a wide range of external reference frequencies and provides tight frequency performance. It is therefore suitable for a wide range of clock/timing applications such as digital radio communication devices, clock generation, and frequency synthesis.

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