61
Douglas C Smith: Communication line transient protection. American Telephone and Telegraph Company, AT&T Information Systems, David H Tannenbaum, David R Padnes, June 14, 1988: US04751607 (22 worldwide citation)

The severity of the problems of transmitting high speed data over a regular twisted wire pair are legendary. These problems arise from a variety of conditions, including the capacitance of the wire (which increases with length) and the propensity of unshielded wire to pickup high induced voltages. A ...


62
Susan F Knowles: Optical fiber cable strain relief assembly. Bell Telephone Laboratories Incorporated, David R Padnes, February 8, 1983: US04372511 (22 worldwide citation)

Sharp bends or kinks which produce microcracks in optical fiber cables are eliminated through the use of a strain relief assembly. The assembly comprises a straight cable duct (101) and a curved cable duct (102). The curved cable duct extends from the straight cable duct and guides an optical cable ...


63
Tzy Hong Chao, Burton R Saltzberg, Jin Der Wang: Technique for determining signal dispersion characteristics in communications systems. AT&T Bell Laboratories, David R Padnes, December 25, 1990: US04980767 (22 worldwide citation)

The present invention covers the notion of determining signal dispersion characteristics, such as amplitude, phase and delay, by transmitting training sequences. More specifically, each sequence comprises a plurality of predetermined symbols and is transmitted two or more times. Detection of each tr ...


64
Frederick J Berkowitz, Sanford S Brown: Dual mode disk controller. American Telephone and Telegraph Company, AT&T Bell Laboratories, David H Tannenbaum, David R Padnes, March 7, 1989: US04811280 (21 worldwide citation)

A dual mode disk controller is disclosed for use between a host processor and its storage medium for controlling data transfer to and from the storage medium. The data is formatted on the medium in two distinct formats, one capable of bulk fast transfers useful in a swapping operation, and the other ...


65
Edmund N Sepe: Coaxial cable. American Telephone and Telegraph Company, AT&T Information Systems, David H Tannenbaum, David R Padnes, April 18, 1989: US04822956 (20 worldwide citation)

Electro-static discharge is a problem with high-speed data even when using coaxial cables. Primarily, this problem arises at the terminal ends of the circuit where connections are made using separate coaxial cables for connecting to various pieces of equipment thereby allowing voltages to be induced ...


66
Qi Bi: Despreading technique for CDMA systems. AT&T Bell Laboratories, David R Padnes, September 6, 1994: US05345468 (20 worldwide citation)

Despreading of the received signal in a CDMA system is provided using code coefficient sequences which are derived from those utilized by the system users to encode their respective symbols. Each derived code coefficient sequence is a function of the correlation between a different user's code coeff ...


67
Shawn M Logan: Track and hold circuit. AT&T Bell Laboratories, David R Padnes, May 21, 1985: US04518921 (20 worldwide citation)

A track and hold circuit comprising an electronic switch and a signal storing device. During a tracking interval, the switch couples a varying input signal from an input node to the storing device in response to at least one track control signal. In a holding interval, the switch isolates the input ...


68
Alexander Feiner, Gi Hong Im, Joseph G Kneuer, Burton R Saltzberg, Jean Jacques Werner: Technique for reducing echoes in conference communications. AT&T Bell Laboratories, David R Padnes, November 8, 1994: US05363441 (20 worldwide citation)

Distortion and instability due to echoes in conference communications is reduced through the use of an echo estimating filter disposed in a conference bridging circuit. This circuit includes a signal combiner which receives information signals from each of the parties in the conference communication ...


69
Hotze Miedema: Method and apparatus for distinguishing between minimum and non-minimum phase fades. Bell Telephone Laboratories Incorporated, David R Padnes, October 25, 1983: US04412350 (20 worldwide citation)

The fade character of a transmitted radio signal comprising an amplitude or phase modulated double-sideband signal is determined from the algebraic sign of the fade induced modulation and the location of the fade notch (.omega..sub.f) relative to the center (.omega..sub.c) of the double-sideband sig ...


70
Mirmira R Dwarakanath, Douglas G Marsh: Operational amplifier with improved offset correction. Bell Telephone Laboratories Incorporated, David R Padnes, March 30, 1982: US04322687 (20 worldwide citation)

Improved input offset voltage compensation of an amplifier (12) is achieved through the use of a servo loop which is added to electronic switch and capacitor offset compensation circuitry disposed in the input (14) and feedback (20) paths of the amplifier. A voltage approximately equal to the offset ...