Synchronisation method of a timing device of a synchronised electrical system

Abstract

Abstract To satisfy more stringent requirements for the frequency stability of the clock supply to a clocked electrical system, it is known to use a high-precision oscillator instead of a previously used crystal oscillator, but this is very costly and space-consuming. The novel method provides the possibility for providing a clock supply which is inexpensive and satisfies the requirements placed on the frequency stability. When the external reference frequency fails for a relatively long time, a system-internal frequency standard is switched on which is spatially separate from the clock device. After a certain heating-up time, the natural frequency of the frequency standard is switched through to the clock device as an internal reference frequency. <IMAGE>

Inventors

• 👤 Wolfram Dipl.-Ing. Ernst

Bibliographic Details