Infineon Technologies Ag

Francesco Labate

Michael Staber

Christian Fleischhacker

Hubert Weinberger

Günter Koder

In order to carry out an equidistant data transfer between clock domains having different clock rates, a combination of a counter () and a finite state machine () is proposed. Said counter () continuously counts off the clock cycles of the faster clock (CLK, while the finite state machine () monitors the clock edges of the slower clock (CLK) and an enabling signal (EN) for the data transfer with the faster clock (CLK) is produced according to the count of the counter ().

Method and circuit for transmitting data between systems having different clock speeds

An adjustable filter, particularly for use as an antialiasing filter in digital telecommunications networks, includes adjustable capacitors which determine frequency response for the purpose of accurate alignment with a particular cut-off frequency. The active filter includes, in line with the invention, a control device with a measuring device for ascertaining the actual cut-off frequency of the filter. On the basis of the ascertained actual cut-off frequency of the filter and the information about the nominal cut-off frequency which is to be set, an adjustment parameter for the adjustable capacitor is selected from a memory arrangement. This adjustment parameter is used to adjust the adjustable capacitor such that the desired nominal cut-off frequency is obtained and, at the same time, the alignment is performed to achieve the nominal cut-off frequency with sufficient accuracy.

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Villach, Austria

Francesco Labate