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:
Jan. 04, 1994
Filed:
Dec. 10, 1992
Ralph Urbansky, Schwaig, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
A circuit arrangement for adjusting the bit rates of two signals of which the higher bit rate signal is structured in frames, includes a buffer memory (2), a write counter and a read counter (6, 8) as well as a phase comparator (7) and a control circuit (10). With these modules the bits of the lower bit rate signal are arranged in the frames of the higher bit rate signal. In addition to these bits negative or positive stuff bits are also inserted in the frames. In order to avoid jitter when the lower bit rate signal is recovered at the receiver end, the phase different between the two signals is determined more accurately. This effected with a counter (55, 56) whose count is applied to the phase comparator (7) to determine the digits after the decimal point for the phase difference. Furthermore, a controller (9) is provided in an automatic control system (7, 10, 8) for controlling the clock for the read counter (8), to which controller the output signal of the phase comparator (7), as well as information about the number of positive or negative bits to be stuffed during the next stuffing operation, is applied.