Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7902919 | Current amplifying element and current amplification method A current amplifying element that operates at a higher speed than conventional semiconductor devices is provided. An input current flows through an input current path 60 in a direction X, and a magnetic field generated from a magnet 90 is applied in a ... | 03/08/2011 |
| 7626452 | Driving circuit to avoid reverse current for soft switching DC motor A driving circuit includes a power supply, an input capacitor, a Hall sensor, a first amplifier, a second amplifier, a full-bridge driver circuit, and a first operational amplifier. The input capacitor is coupled to the power supply. The input end of the first ampli... | 12/01/2009 |
| 7348839 | Method and apparatus for DC offset cancellation in amplifiers A system, circuit, and method of canceling DC offset errors in cascaded amplifiers comprises arranging a plurality of any of analog voltage and analog current amplifier stages in any of cascaded and parallel configurations; operatively connecting a feedback comparat... | 03/25/2008 |
| 7279891 | Permalloy bridge with selectable wafer-anistropy using multiple layers A magnetic sensing method and apparatus include a plurality of bridge circuits, wherein each bridge circuit or element within a bridge is formed on a separate permalloy layer comprising a plurality of permalloy bridge runners. The permalloy bridge runners can be sel... | 10/09/2007 |
| 7275445 | Modular pressure sensor drive connectable to a computer The modular measuring drive system can include a housing having a cavity and being sized and shaped to fit within a disk drive bay of a computer and a measuring device, disposed within the cavity of the housing, for providing a measurement value to the computer. The... | 10/02/2007 |
| 7231325 | System for evaluating a sensor signal The inventive device for evaluating the sensor signal includes the provider for providing the sensor signal, the processor for processing the sensor signal and for providing an information signal comprising information regarding the amplitude course of the sensor si... | 06/12/2007 |
| 7205622 | Vertical hall effect device A vertical Hall effect apparatus, including methods thereof. A substrate layer can be provided upon which an epitaxial layer is formed. The epitaxial layer is surrounded vertically by one or more isolation layers. Additionally, an oxide layer can be formed above the... | 04/17/2007 |
| 7129882 | Successive approximation ad converter having pulse noise suppression A successive approximation AD converter. A voltage comparator receives an analog input signal and a reference voltage. A successive approximation register receives the voltage comparator output, and a DA converter, connected to the successive approximation register,... | 10/31/2006 |
| 7116094 | Apparatus and method for transmission and remote sensing of signals from integrated circuit devices An apparatus and a method for testing semiconductor devices, such as individual integrated circuits in semiconductor chips, by directing a current in each circuit through a respective selected predetermined path to establish, in each circuit, a respective focused ma... | 10/03/2006 |
| 7084622 | Methods for eliminating magnetic field and temperature related errors in magnetic sensors used for the measurement of coating thickness Methods for eliminating error in magnetic sensors used for measuring a coating thickness caused by static or changing external magnetic fields or temperature. The methods involve measuring an output voltage of a magnetic sensor, corresponding to an internal resistan... | 08/01/2006 |
| 7061311 | Differential amplifier for dual bridge transducer A plurality of bridge transducers are provided in a dual arrangement. An output terminal from each transducer is coupled to differential inputs of an amplifier. Each of the other outputs from the transducers are respectively coupled together and used to control a bi... | 06/13/2006 |
| 7005915 | Series bridge circuit with amplifiers Two bridge type transducers are coupled in series with their outputs each driving one of a pair of differential amplifiers, with the outputs tied together in a push-pull configuration. In further embodiments, push-pull operation is obtained by matching amplifier gai... | 02/28/2006 |
| 6921955 | Noise-proof semiconductor device having a Hall effect element A noise-proof, integrated semiconductor current detector is disclosed which has formed in a semiconductor substrate a Hall generator for providing a Hall voltage in proportion to the strength of a magnetic field applied, a control current supply circuit for deliveri... | 07/26/2005 |
| 6909166 | Leads of a no-lead type package of a semiconductor device The present invention relates to leads of a No-Lead type package which includes a chip having an active surface and a rear surface opposite the active surface. The active surface has a plurality of connection points with a plurality of leads arranged around the peri... | 06/21/2005 |
| 6891431 | Integrated semiconductor circuit configuration To measure the current consumption of a circuit device with a current measuring device, the circuit device being supplied by a current/voltage supply line device, as simply as possible without the need for additional measuring devices, an integrated circuit configur... | 05/10/2005 |
| 6674322 | Amplifier circuit with offset compensation An amplifier circuit with offset compensation is particularly suited for a Hall element. In addition to the useful signal demodulation that is normally present and connected downstream of an amplifier, an error signal demodulator provides an error signal ... | 01/06/2004 |
| 5389889 | Temperature-compensated current source for use in a hall analog magnetic-field detector A temperature-compensated current source energizes a Hall element. The current source includes a voltage divider across the DC voltage supply busses and a differential amplifier arranged as a voltage follower which develops the output voltage across a ref... | 02/14/1995 |
| 5334944 | Differential amplifier circuit for enhancing small voltage signals A differential amplifier circuit suitable for amplifying a faint signal, such as the output of a magnetic sensor including a Hall element. The differential amplifier circuit includes switching units which are provided at the input and output terminals of ... | 08/02/1994 |
| 4726453 | Self-adjusting single- or twin-tube shock absorber A self-adjusting single- or twin-tube shock absorber having a cylinder closed at both ends and filled with at least one damping medium, a piston rod sealingly inserted into the cylinder, and a piston carried on the cylinder side end of the piston rod for ... | 02/23/1988 |
| 4709214 | Integrated Hall element and amplifier with controlled offset voltage An integrated circuit includes an epitaxial layer. In a near central region thereof is formed a symmetrical array of four equal sized Hall cells that are connected in parallel to form one Hall element. A moat surrounds the Hall element consisting of two c... | 11/24/1987 |
| 4705964 | Integrated circuit hall switch with adjustable operate point A silicon integrated circuit has a Hall-element, a differential amplifier and a Schmitt trigger circuit connected in tandem to form a Hall switch. It is demonstrated that only one set of component parameters, e.g. resistor values, exists that provides an ... | 11/10/1987 |
| 4645950 | Two-lead Hall effect sensor A two-lead Hall effect sensor (10) has a combined voltage supply and output terminal (12) and a ground or reference terminal (14). A Hall device (16), a comparator (18) and a voltage/current converter (20) are each connected between terminals (12) and (14... | 02/24/1987 |
| 4645949 | Circuit arrangement for enhancing the utilizable hall-signal of hall sensor Circuit for enhancing the utilizable Hall signal of a Hall sensor, including N Hall generators being operated with impressed control current and having Hall signal paths, N voltage to current converters each having an output and each being coupled to the ... | 02/24/1987 |
| 4616188 | Hall effect isolation amplifier An isolation amplifier circuit is described that utilizes a magnetic field in combination with a Hall effect device to isolate input signals and output signals. The input signal is applied to a conducting coil that produces a magnetic field in a Hall effe... | 10/07/1986 |
| 4464629 | Hall element device A Hall element device comprising a plurality of Hall elements including a first and last Hall element, each of the elements including a first input, a second input, a first output and a second output; a control current circuit, electrically connected to e... | 08/07/1984 |
| 4382762 | Thermoforming apparatus and method Thermoforming equipment includes a solid state sensor adapted to determine when a sheet of thermoplastic material has been clamped between a forming mold and a heating platen. Clamping force is provided by a cutter blade carried by said mold around the pe... | 05/10/1983 |
| 4218659 | Amplifier circuit for a hall-effect head A Hall-effect element is connected at one Hall current terminal to ground and at the other Hall current terminal to a DC voltage application circuit. Two Hall voltage terminals of the Hall-effect element are coupled with the base and the emitter of a firs... | 08/19/1980 |
| 4163119 | Protective circuit for electroacoustic transducer with hall element and voice coil temperature rise time constant circuit The output signal of an l-f (low-frequency) power amplifier is supplied to an electroacoustic transducer, through an inductive element for preventing parasitic oscillation, to cause the inductive element to generate a magnetic flux whose density depends o... | 07/31/1979 |
| 4134030 | Hall-effect integrated circuit switch An integrated circuit in which the Hall-Effect device and the sensing circuit can be incorporated on a single monolithic chip includes a Hall-Effect generator responsive to a magnetic flux change for generating a Hall-Effect voltage. A differential amplif... | 01/09/1979 |
| 4099238 | Apparatus for determining a magnetic field A magnetic field is determined with a Hall element having a high sensitivity. Such an element is very susceptible to a variation of environmental temperature and thus requires a compensation thereof for the determination of a magnetic field. Two electric ... | 07/04/1978 |
| 3974425 | Isolator circuit with improved frequency response An isolator circuit of the type designed to accept an input current and to generate a corresponding output current which is isolated from the input. The isolator circuit is formed with a core developing a flux in response to the input current and having a... | 08/10/1976 |
