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Institution

Motorola

CompanySchaumburg, Illinois, United States
About: Motorola is a company organization based out in Schaumburg, Illinois, United States. It is known for research contribution in the topics: Signal & Communications system. The organization has 27298 authors who have published 38274 publications receiving 968710 citations. The organization is also known as: Motorola, Inc. & Galvin Manufacturing Corporation.


Papers
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Patent
11 Jul 1997
TL;DR: In this paper, the load impedance at the output of a power amplifier is modified by varying a voltage variable capacitor (VVC) to maximize the efficiency of the power amplifier.
Abstract: A unique method and apparatus modifies the load impedance at the output of a power amplifier by varying a voltage variable capacitor (VVC) (310) to maximize the efficiency of the power amplifier (304) A comparator (509) generates amplifier control signal (211) based upon a detected power output signal (216) and a reference signal In addition to providing power control, the control signal is also coupled to a VVC circuit (506) to control the output impedance of the power amplifier In an alternate embodiment, a separate VVC control signal (527) based upon a comparison of the power control signal and the battery voltage is coupled to a VVC In another alternate embodiment, a second VVC can be coupled in parallel to the first VVC The second VVC is preferably controlled by a signal (805) based upon the current in the power amplifier Finally, an alternate embodiment incorporates a VVC circuit (506) at the input of the power amplifier to compensate for variations in input impedance to improve other power amplifier parameters such as IM, gain, output power and noise level

159 citations

Patent
Bruckert Eugene1
03 Mar 1993
TL;DR: In this paper, a spread-spectrum noise cancellation method was proposed to cancel a portion of a spread spectrum noise signal in the received signal (200) by generating an estimated signal (270) by spreading (260) the second known signal at the second component received phase (204) with the first known signals at the first component receiving phase (224) and adjusting a gain (268) of an integrated form of the spread second signal as a function of the received amplitudes of the first (216) and the second (236) components.
Abstract: A spread-spectrum noise canceller (182) is provided. A received phase and a received amplitude for a first (216) and a second (236) component of a received spread-spectrum signal (200) is determined. The second component (236) is structurally similar to [a replica of] the first component (216), but differs by being received at a different time, being transmitted along a different path, or having a different phase [which was received at a different time]. In addition, the spread-spectrum signal (200) includes a first and a second known signal. A portion of a spread-spectrum noise signal in the received signal (200) is canceled by generating an estimated signal (270) by spreading (260) the second known signal at the second component received phase (204) with the first known signal at the first component received phase (224) and adjusting a gain (268) of an integrated form of the spread second known signal as a function of the received amplitudes of the first (216) and the second (236) components. Subsequently, the second known signal is processed out of the received spread-spectrum signal (200) by subtracting (166) the estimated signal (270) from a demodulated form (216, 236) of the received spread-spectrum signal (200).

159 citations

Patent
23 Dec 2006
TL;DR: In this paper, a user profile is created by recording a plurality of inferred or estimated emotional states of the user, which can include a time sequence of emotional states, stimulus contexts for such states, and a temporal relationship between the emotional state and the stimulus context.
Abstract: A method (50) of altering content provided to a user includes the steps of creating (60) a user profile based on past physiological measurements of the user, monitoring (74) at least one current physiological measurement of the user, and altering (82) the content provided to the user based on the user profile and the at least one current physiological measurement. The user profile can be created by recording a plurality of inferred or estimated emotional states (64) of the user which can include a time sequence of emotional states, stimulus contexts for such states, and a temporal relationship between the emotional state and the stimulus context. The content can be altered in response to the user profile and measured physiological state by altering at least one among an audio volume, a video sequence, a sound effect, a video effect, a difficulty level, a sequence of media presentation.

159 citations

Patent
B. Maiti1, Philip J. Tobin1, C. Joseph Mogab1, Christopher C. Hobbs1, Larry E. Frisa1 
30 Jun 1998
TL;DR: In this article, a metal layer (18) is formed over a gate dielectric layer (14, 16) on a semiconductor substrate, and a masking layer (20) is patterned to mask a portion of the metal layer.
Abstract: In one embodiment, a metal layer (18) is formed over a gate dielectric layer (14, 16) on a semiconductor substrate. A masking layer (20) is patterned to mask a portion of the metal layer (18). An exposed portion of the metal layer (18) is nitrided to form a conductive nitride layer (24). The masking layer (20) is removed and the conductive nitride layer (24) is patterned to form a first gate electrode (23) having a first work function value, and the conductive layer (18) is patterned to form a second gate electrode (25) having a second work function value which is different from that of the first work function value.

159 citations

Patent
30 Oct 1998
TL;DR: In this paper, a planar fuel cell with a membrane electrode assembly sandwiched between two current collector assemblies is presented, and the interconnect tab is sealed to prevent leaking of fuel or oxidant gases.
Abstract: A planar fuel cell (20) is provided, including a membrane electrode assembly (23) sandwiched between two current collector assemblies (21, 22). The membrane electrode assembly is a single sheet of a polymer electrolyte membrane with an array of anodes (27) on one side and an array of corresponding cathodes (28) on the other side. The current collectors (25) can be supported by a plastic frame (24), and they have an interconnect tab (26) that provides an electrical pathway to the exterior of the membrane electrode assembly. The interconnect tab is situated to provide electron transfer between the anodes and the cathodes such that the interconnect tab does not traverse the thickness of the polymer electrolyte membrane. When the planar fuel cell is assembled, the interconnect tab is sealed to prevent leaking of fuel or oxidant gases. Fuel is distributed (36) to only one side of the membrane electrode assembly and oxidant is distributed (36) only to the other side.

159 citations


Authors

Showing all 27298 results

NameH-indexPapersCitations
Georgios B. Giannakis137132173517
Yonggang Huang13679769290
Chenming Hu119129657264
Theodore S. Rappaport11249068853
Chang Ming Li9789642888
John Kim9040641986
James W. Hicks8940651636
David Blaauw8775029855
Mark Harman8350629118
Philippe Renaud7777326868
Aggelos K. Katsaggelos7694626196
Min Zhao7154724549
Weidong Shi7052816368
David Pearce7034225680
Douglas L. Jones7051221596
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
20229
202129
2020131
2019134
2018144