1
Stephen C Kenyon, Laura J Simkins, Leroy L Brown, Richard Sebastian: Broadcast signal recognition system and method. Ensco, Sixbey Friedman & Leedom, May 22, 1984: US04450531 (366 worldwide citation)

The method for the automatic electronic recognition of a program unit broadcast by radio waves includes the formation of a plurality of reference signal segments from the program unit and the processing of such segments to obtain digitized reference signal segments which are then normalized and stor ...


2
Jerome Johnson Tiemann, Daniel David Harrison: Low power parallel correlator for measuring correlation between digital signal segments. General Electric Company, Marvin Snyder, Douglas E Stoner, April 20, 1999: US05896304 (166 worldwide citation)

Correlation between a pair of digital signal segments is measured by apparatus including a plurality of multipliers. Each of the multipliers produces the product of a respective sample of each one of the signal segments. The outputs of a plurality of digital-to-analog (D/A) converters are coupled to ...


3
Klaus Schulze: Process and circuit arrangement for the automatic recognition of signal sequences. Media Control Musik Medien Analysen Gesellschaft mit beschrankter Haftung, Cushman Darby & Cushman, April 17, 1990: US04918730 (159 worldwide citation)

An arrangement for automatically recognizing signal sequences such as spe and/or music signals, particularly useful for statistical evaluation of the frequency of play of music titles, commercial advertising spots, or verbal materials, etc. One envelope signal is generated from each preset signal se ...


4
Donald W Rouse, Lawrence B Horwitz: Correlation detectors for use in direct sequence spread spectrum signal receiver. Sangamo Weston, Dale Gaudier, December 24, 1985: US04561089 (133 worldwide citation)

A plurality of transmitters synchronized to a common clock each transmit a data signal spread by a common bipolar pseudo-random code having a different assigned code sequence shift. A receiver, synchronized to the clock, discriminates the signal transmitted by a predetermined transmitter from signal ...


5
Richard Stepp: Multiple-input four-quadrant multiplier. Siemens Aktiengesellschaft, Jeffrey P Morris, May 19, 1992: US05115409 (110 worldwide citation)

A four-quadrant multiplier based on a Gilbert cell is utilized to multiply several signals by a similar signal. The transistors in two pairs of coupled differential amplifiers of one input terminal of the inner multiplier that is activated like a Gilbert cell by way of a diode-and-transistor section ...


6
Lowell W Bauer: Digital-to-bandpass converter. The United States of America represented by the Secretary of the Navy, Richard S Sciascia, Don D Doty, Harvey A David, October 19, 1976: US03987280 (90 worldwide citation)

A conversion system is disclosed for generating a desired bandpass waveform rom digital samples of a lower frequency, bandlimited original waveform. The system utilizes a single digital to analog converter and an impulse driver to generate a weighted pulse train that contains frequency shifted repli ...


7
Alexander W Moopenn, Anilkumar P Thakoor, John J Lambe: Hybrid analog-digital associative neural network. The United States of America represented by the Administrator National Aeronautics and Space Administration, Thomas H Jones, Paul F McCaul, John R Manning, February 21, 1989: US04807168 (81 worldwide citation)

Random access memory is used to store synaptic information in the form of a matrix of rows and columns of binary digits. N rows read in sequence are processed through switches and resistors, and a summing amplifier to N neural amplifiers in sequence, one row for each amplifier, using a first array o ...


8
Kenneth E Johnson, William L Abbott, Hung C Nguyen: Timing control for PRML class IV sampling data detection channel. Quantum Corporation, David B Harrison, November 2, 1993: US05258933 (80 worldwide citation)

A multi-mode timing loop for a PR4,ML sampled data channel includes an analog to digital converter and a digital finite impulse response filter for providing conditioned digital samples. The timing loop includes a reference clock source for putting out a reference clock frequency related to a nomina ...


9
Gilbert P Hyatt: Signature filter system. Gilbert P Hyatt, July 24, 1990: US04944036 (79 worldwide citation)

A filtering system is provided for acquiring and processing signals using a sampled filter for signal separation and signal enhancement; such as for determing locations, distances, and times in a geophysical exploration system. Signature signals permit mixing and seperation with sampled filters, suc ...


10
Robert P Talambiras: Sampling network analyzer with stored correction of gain errors. Dranetz Engineering Laboratories, Richard C Woodbridge, November 8, 1983: US04414638 (75 worldwide citation)

An improved sampling network analyzer is described, in which a stored memory, for example, a programmable read-only memory (PROM), is utilized to store the discrepancies between various predetermined mid-band voltage gains and their desired, exact values, and to supply this correction information to ...



Click the thumbnails below to visualize the patent trend.