Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8169215 | Magnetic sensor and method of manufacturing thereof The present invention relates to a magnetic sensor with which magnetic characteristics are made extremely stable by consideration of an area of contact of a base layer of a magnetic substance and a semiconductor substrate. On a semiconductor substrate (111) a... | 05/01/2012 |
| 8150657 | Physical quantity measuring instrument and signal processing method thereof The present invention relates to a physical quantity measuring instrument and signal processing method thereof capable of reducing noise components and improving reliability without increasing size or cost of the circuit. A physical quantity detecting unit (11 | 04/03/2012 |
| 8143343 | Microphase-separated structure, immobilized microphase-separated structure and wavelength-variable laser oscillator, temperature sensor and light filter using the structure A microphase-separated structure comprising a block copolymer, which contains at least a block chain A consisting of a monomer A as a repeating unit and a block chain B consisting of a monomer B as a repeating unit, and a solvent, wherein the solvent has a temperatu... | 03/27/2012 |
| 8085035 | Hall element and magnetic sensor A Hall element is provided which has a high sensitivity and contributes to an improvement in S/N ratio per current by using a low-concentration n-well within a suitable range. The Hall element includes a p-type semiconductor substrate layer of p-type silicon, and an... | 12/27/2011 |
| 8084083 | Method for manufacturing an anisotropic conductive adhesive sheet A method for manufacturing an anisotropic conductive adhesive sheet is disclosed. The sheet comprises at least a curing agent, a curable insulating resin, and conductive particles. The method comprises providing an adhesive layer on a biaxially stretchable film to f... | 12/27/2011 |
| 8054291 | Pointing device A pointing device is provided which can reduce its size and height, reduce leakage magnetic flux density to the outside. Magnetic sensors are disposed symmetrically two by two on X and Y axes on a printed circuit board. A silicone resin is placed on the printed circ... | 11/08/2011 |
| 8027803 | Traveling direction measuring apparatus and traveling direction measuring method The present invention relates to a traveling direction measuring apparatus usable as a pedestrian navigation system in locations where it is difficult to obtain high positioning accuracy such as inside buildings or around multistory buildings where a GPS cannot be u... | 09/27/2011 |
| 7948412 | Delta-sigma modulator The present invention provides a continuous-time delta-sigma modulator which is configured with an SC (SCR) feedback DA (103) for improving tolerance to jitter for a clock signal and operates stably by maintaining a certain feedback amount without being influ... | 05/24/2011 |
| 7898240 | Current measuring apparatus The present invention provides a current measuring apparatus having an improved structure to inhibit the possible adverse effect of a current in a different phase and the possible generation of an induced electromotive force caused by a measurement target current, e... | 03/01/2011 |
| 7881900 | Acceleration measuring device A reference point defined on a two dimensional or three dimensional orthogonal coordinate space and scale reference of respective axes are estimated based on a distribution on the three dimensional orthogonal coordinate space at the time when respective axial compon... | 02/01/2011 |
| 7847635 | Transconductance amplifier Provided is a transconductance amplifier capable of suppressing variation in the range of a linear relationship between an input voltage and an output current depending on the magnitude of a tuning voltage Vctrl, thereby adjusting transconductance over a wider range... | 12/07/2010 |
| 7843190 | Position detection apparatus A magnetic flux detection unit and a rectangular solid magnet are provided. The magnetic flux detection unit includes one or more pairs of Hall sensors, each pair having two Hall sensors arranged on a substrate. The solid magnet is arranged movably in a direction in... | 11/30/2010 |
| 7818138 | Position detecting device and position detecting method The present invention relates to a position detecting device capable of canceling an error due to looseness in a vertical direction and of eliminating variation in temperature characteristics by calculating a ratio between output voltages of a plurality of Hall elem... | 10/19/2010 |
| 7805275 | Traveling direction measuring apparatus and traveling direction measuring method A traveling direction measuring apparatus including 3-axes acceleration detecting means for detecting acceleration, and acceleration data acquiring means for repeatedly obtaining 3-axes acceleration data, said 3-axes acceleration varying with walking of a pedestrian... | 09/28/2010 |
| 7791014 | Optical device and a method of manufacturing an optical device having a photoelectric conversion element and an optical adjustment element The present invention provides an optical device that is miniature, is highly sensitive and has a simplified package, and a manufacturing method thereof with high production efficiency and high reliability. The present invention is an optical device comprising: a ph... | 09/07/2010 |
| 7777562 | Distortion suppression circuit for digital class-D audio amplifier A digital Class-D amplifier distortion suppression circuit design is disclosed. A distortion suppression feedback loop is described to improve audio performance by suppressing output stage non-linearity and improving power supply noise rejection achieving reduced TH... | 08/17/2010 |
| 7768349 | Transconductance amplifier An embodiment of the present invention has a differential pair including a first and second MOS transistors having their sources grounded; a third and fourth transistor with their source terminals connected to drain terminals of the first and second transistors, res... | 08/03/2010 |
| 7768048 | Infrared sensor IC, and infrared sensor and manufacturing method thereof An infrared sensor IC and an infrared sensor, which are extremely small and are not easily affected by electromagnetic noise and thermal fluctuation, and a manufacturing method thereof are provided. A compound semiconductor that has a small device resistance and a l... | 08/03/2010 |
| 7724088 | Push-pull amplifier A push-pull amplifier includes a voltage inversion circuit 9 that uses an output of the differential amplifier 1 as an input signal, and includes a set of resistors 7a, 7b, and a differential amplifier 8 for inverting... | 05/25/2010 |
| 7687208 | Positive photosensitive resin composition A positive photosensitive resin composition excellent in sensitivity and resolution, characterized by comprising 100 parts by mass of (A) a hydroxypolyamide comprising repeating units represented by the general formula (1), 1 to 50 parts by mass of (B) a photoacid g... | 03/30/2010 |
| 7686982 | Conductive filler Disclosed is a conductive filler which can be fusion-bonded under lower temperature conditions (with the peak temperature of not less than 181° C.) than the reflow heat treatment conditions for an Sn-37Pb eutectic solder. This conductive filler is applicable to hea... | 03/30/2010 |
| 7675377 | Voltage controlled oscillator The present invention provides a voltage controlled oscillator having a wide frequency variation range and an oscillation frequency that shows favorable linearity with respect to control voltage. The present invention includes an amplifier circuit 21, a piezo... | 03/09/2010 |
| 7674566 | Positive photosensitive resin composition The present invention provides a positive photosensitive resin composition, characterized by comprising 1 to 50 parts by mass of a photo-acid generator and 0.01 to 70 parts by mass of a terpene compound in combination with 100 parts by mass of a hydroxypolyamide hav... | 03/09/2010 |
| 7656202 | Driving device and driving method A driving device and driving method for controlling electric power to a load is provided. The driving device controls switching operations of switching elements by setting a first duration in which electric power is supplied to the load and by setting a second durat... | 02/02/2010 |
| 7653507 | Acceleration measuring device The present invention relates to an acceleration measuring device capable of acquiring the offset for correcting the output of a triaxial acceleration sensor. The invention is provided with an acceleration sensor for detecting the acceleration in a triaxial directio... | 01/26/2010 |
| D597428 | Infrared ray sensor | 08/04/2009 |
| 7567078 | Magnetic rotation-angle sensor and angle-information processing device A simple circuit configuration without increasing the number of magnetic poles of a magnet can be performed and angular resolution can be improved. The polarities is determined and the absolute values are compared in accordance with the rotation angle of a magnet ( | 07/28/2009 |
| 7563557 | Polyamide A polyamide having a structure represented by the chemical formula (1): wherein m and n represent an integer satisfying m≧1, n≧1, 2≦(m+n)≦150, 0.3≦m/(m+n)≦0.9, R1 and R2 represent at least ... | 07/21/2009 |
| 7557866 | Automatic gain control circuit An AGC control section (110) has a first operation mode for controlling the gain of a variable gain amplifier (103) to maintain the amplitude of the sync signal measured by a sync signal amplitude measuring circuit (108) at a constant value, and... | 07/07/2009 |
| 7463090 | Driving device Output signal waveform having high input signal reproducibility is outputted from inductive load or the like. Output signals V1a and V1b obtained by feeding back an output signal Vp-n1 at output terminals 50 and 51 ac... | 12/09/2008 |
| 7416822 | Resin and resin composition Disclosed is a hydroxy polyamide represented by the following general formula (1) and having a 5-amino isophthalic acid derivative structure in the main chain structure. (1) (In the formula, m and n represent integers, X represents at least one tetravalent organic g... | 08/26/2008 |
| 7406301 | Modulation-demodulation apparatus and wireless communication apparatus A modulation-demodulation apparatus of a relatively simple arrangement is able to prevent a bad influence caused due to interference between two local oscillators and a portable wireless communication apparatus uses this modulation-demodulation apparatus. In a modul... | 07/29/2008 |
| 7388574 | Pointing device A pointing device is provided which facilitates the assembly, achieves downsizing and has a long life. Magnetic sensors 21 are placed symmetrically two by two along an X axis and Y axis on a printed circuit board 24. A switch 28 is placed on a s... | 06/17/2008 |
| 7376527 | Azimuth measuring device An azimuth measuring device is provided that can obtain offset information when the direction of the azimuth measuring device is arbitrarily changed. The offset information is calculated based on coordinates of a reference point obtained by a reference point estimat... | 05/20/2008 |
| 7353705 | Oscillation type intertial force sensor The oscillation type inertial force sensor includes an oscillator arranged to detect an inertial force, an oscillation circuit unit arranged to drive the oscillator, and a signal processing circuit unit arranged to generate a signal according to the magnitude of the... | 04/08/2008 |
| 7340362 | Azimuth measurement device and azimuth measurement method There are provided an azimuth measurement device and its method for realizing an update of an offset calculated from the data acquired by azimuth measurement. A geomagnetism output measured by a 3-axis magnetic sensor is amplified and input to an A/D conversion sect... | 03/04/2008 |
| 7282323 | Highly heat-resistant, negative-type photosensitive resin composition Disclosed is a negative type photosensitive resin composition comprising (A) a polyamide having a photopolymerizable unsaturated double bond, (B) a monomer having a photopolymerizable unsaturated double bond, (C) a photopolymerization initiator and (D) a melamine re... | 10/16/2007 |
| 7177779 | Azimuth measuring device and azimuth measuring method An azimuth measuring device capable of calibrating a magnetic sensor without putting load on a user is provided. When a point having amplified output values Sx, Sy, Sz after a sensitivity correction as x, y, z components is arranged on an xyz coordinate system, an o... | 02/13/2007 |
| 7129691 | Current sensor and current sensor manufacturing method A low-cost, current sensor suitable for mass production and a manufacturing method thereof are provided. The current sensor is small with high sensitivity and can be packaged in a standard assembly line which is normally used when an integrated circuit is manufactur... | 10/31/2006 |
| 7106046 | Current measuring method and current measuring device A current measuring method capable of reducing the size of a current sensor while ensuring electric insulation easily and suitable for enhancing reliability by preventing heat generation. A current measuring device comprises a printed board (3) having a condu... | 09/12/2006 |
