A new type of balanced-bridge controlled oscillator

Karlquist, R.K.

doi:10.1109/freq.1997.639206

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…For this reason we decided to simulate separately all the parts of Gaia that need high multiplication factors, adapting the power of all the noises to the adequate PLL profiles. We have modeled three possible PLLs, with a "bad", a "medium" and a "good" response -based on the specifications of prototype and commercial devices such as those described in Kitching (2003) and Karlquist (1999). shows the results, which have been truncated to lower frequencies for the sake of a better visualization.…”

Section: Frequency Dividers and Multipliersmentioning

confidence: 99%

Assessing the Clock of Gaia: Design and Implementation of A Clock Framework Simulator

et al. 2004

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A powerful and highly configurable simulator of generic clock frameworks is presented and evaluated. This software tool was initially designed to test the reliability of clock data for the Gaia space mission. However, our application has been developed as much parameterized as possible in order to easily adapt it to any other space mission. The main goals of our software tool are to simulate the real performance of an atomic master clock, including the typical noises present in this kind of devices, and to check the reliability of the generation and distribution of clock sub-products. The latter, which are generated by other devices such as frequency multipliers and dividers, are also implemented in the simulator, as well as the corresponding transmission lines. In our simulator the clock outputs obtained from the several nodes of the framework can be displayed with the appropriate graphical tools, therefore easing the task of validating several design issues. Also, the parameters of the master clock and of all the framework devices, as well as the whole clock framework structure are entered using XML files, which can also be graphically verified. Finally, the accuracy and stability of the atomic clock which is expected to fly on-board of Gaia is assessed. We also discuss in depth the several issues regarding the time data products that Gaia will require and we characterize the most important elements.

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Section: Frequency Dividers and Multipliersmentioning

confidence: 99%

Assessing the Clock of Gaia: Design and Implementation of A Clock Framework Simulator

et al. 2004

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“…The oscillator is however highly complex because if the bridge should work in a balanced state then the structure of the oscillator leads to a complete AFC loop, controlled by the bridge [3].…”

Section: Introductionmentioning

confidence: 99%

Highly pure signal generators

Papež¹,

Papezova²

2009

2009 9th International Conference on Telecommunication in Modern Satellite, Cable, and Broadcasting Services

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The special testing signal generators were designed for a series of frequencies in the frequency band 0.5 to 20 MHz. The generator is very simple. It is composed of only one stable crystal oscillator and one high power amplifier. The frequency stability of the generators is in the order of 10 -6 /day, the output power is 1W, the value of SINAD is under -130 dB and the total harmonic distortion is under -170 dB by using a linear narrowband filter.

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