The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1999
Filed:
Jun. 16, 1997
Manfred Ammler, Bergheim, DE;
Peter Hora, Schrobenhausen, DE;
Guenter Fendt, Schrobenhausen, DE;
Norbert Mueller, Schrobenhausen, DE;
TEMIC TELEFUNKEN microelectronic GmbH, Heilbronn, DE;
Abstract
In a method and system for transmitting digital data, a data acceptance clock signal generator that has a controllable clock frequency in a peripheral module is correspondingly adapted to clock frequency information derived from a synchronization pulse train transmitted by a central unit. The same oscillator is used as a frequency source for determining the clock frequency information and for generating the data acceptance clock pulse. In this manner, simple RC oscillators are adequate to fulfill any requirements of long time accuracy of the oscillator. The clock frequency can be changed in that the central unit simply transmits altered clock frequency information. It is also possible to carry out an adjustment or adaptation in the case of deviations of the oscillator frequency in the peripheral unit. Preferably, the clock frequency information is derived from the reciprocal value of the time duration of at least one synchronization pulse, which is determined in a quantized manner by a first counter in a clock frequency information acquisition circuit which counts the number of oscillator pulses occurring during the synchronization pulse. The resulting count value is provided to a data acceptance clock signal generator, which is clocked by the same oscillator and counts the number of oscillator pulses until reaching a prescribed threshold value, whereupon it outputs a corresponding clock signal. By properly adapting numerical elements, it is also possible to process pulse width modulated signals using the present method and apparatus.