Thomas M Kaplan
Engineers at Snider Ln, Allen, TX
License number
Colorado 42720
Issued Date
Dec 29, 2008
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
1810 Snider Ln, Allen, TX 75002
Professional information
Method And Apparatus For Facilitating An Interface To A Digital Signal Processor
US Patent:
6198753, Mar 6, 2001
Filed:
May 20, 1997
Appl. No.:
8/858993
Inventors:
Harbhajan S. Virdee - Richardson TX
Thomas M. Kaplan - Allen TX
Thomas M. Kaplan - Allen TX
Assignee:
Alcatel USA Sourcing, L.P. - Plano TX
International Classification:
H04J 306
US Classification:
370509
Abstract:
According to the teachings of the present invention, a data path interface (16) for receiving an incoming signal (14) and facilitating an interface to a digital signal processor (18) includes a synchronizer (62) for determining a signaling frame in a processed signal received from the digital signal processor (18). The data path interface (16) also includes an idle code detector (76) operable to detect an idle code in the incoming signal (14) by comparing the incoming signal (14) to at least one user-programmable idle code pattern. The data path interface (16) further including a least significant bit detector (78) operable to detect a loss of information in the incoming signal (14) by monitoring the status of the least significant bit of each channel to determine whether that bit is stuck at a particular value. The data path interface (16) still further including a daughter card interface (80) operable to receive signals containing eight-bit words and to concatenate those signals to form signals containing sixteen-bit words. The daughter card interface (80) being further operable to transmit the concatenated signal to a daughter card (28).
Idle Code Density Detector
US Patent:
6111862, Aug 29, 2000
Filed:
Jun 19, 1997
Appl. No.:
8/879844
Inventors:
Thomas M. Kaplan - Allen TX
Assignee:
Alcatel USA Sourcing, L.P. - Plano TX
International Classification:
H04B 320, H04M 100
US Classification:
370287
Abstract:
An echo canceler (10) includes an idle code density detector (12) that measures an idle code density over a period of time. The idle code density detector (12) includes an idle code detector (30) that identifies idle codes and non-idle codes. An idle code integrator (32) increments an idle code count (36) by a first weight factor (38) for each idle code identified by the idle code detector (30). The idle code integrator (32) decrements the idle code count (36) by a second weight factor (40) for each non-idle code identified by the idle code detector (30). A threshold detector (34) continuously compares the idle code count (36) to a threshold value (42). When the idle code count (36) exceeds the threshold value (42), the threshold detector (34) generates a control signal (22) to disable an adaptive filter (14) and a processor (18) of the echo canceler (10).