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. 24, 1989
Filed:
Mar. 03, 1987
Mark A Nichols, Las Vegas, NV (US);
Pathfinder Systems, Inc., Las Vegas, NV (US);
Abstract
A circuit is described for use in a telephone switching system, for generating a large number of frame sync pulses that are progressively offset in time from one another, and that each control the operation of a pair of codecs (coder/decoder circuits). A high frequency clock signal is divided to generate a series of square waves that are 2's multiples of the lowest frequency square wave, such as 8 kHz, 16 kHz, 32 kHz, 64 kHz, and 128 kHz. These square waves are inputted to an integrated circuit of a type commonly used for addressing, to generate pulses on the several outputs at controlled different times, these pulses being delivered to the codecs. A plurality of such integrated circuits are used, with the inverse of the lower frequencies also being generated, and with different combination of the lower frequencies and their inverses delivered to different ones of the integrated circuits.