Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 8174254 | Measuring device with negative-feedback DC voltage amplifier A measuring device having a detector with at least one detector element and, connected downstream of the detector, a DC voltage amplifier with at least one input (and at least one output. The DC voltage amplifier provides at least one negative-feedback path, which e... | 05/08/2012 |
| 8022688 | RF power detector Real power delivered to a load in an RF transmit path is measured. Measuring the real power includes supplying a first voltage from a first side of a passive network disposed between the power amplifier and the load, supplying a second voltage from a second side of ... | 09/20/2011 |
| 7342761 | Apparatus and method for limiting application of electrical power to a load The application of electric power from a power source to a load is controlled by detecting the magnitude of electric current flowing to the load and producing a first signal level that is indicative of that magnitude. The first signal level is compared to a referenc... | 03/11/2008 |
| 7327149 | Bi-directional MOS current sense circuit A current sensing circuit comprises a power device adapted to conduct a bidirectional current between first and second terminals thereof, first and second sensing devices operatively coupled to the power device, a sense amplifier providing first and second voltages ... | 02/05/2008 |
| 7230431 | Integrating electrometer amplifying circuit An aerosol particle spectrometer utilizes a high voltage central electrode and a series of annular, axially arranged collector electrodes maintained at ground, for collecting positively charged particles suspended in an aerosol flowing between the electrodes. Each c... | 06/12/2007 |
| 7184345 | High speed and high precision sensing for digital multilevel non-volatile memory system A digital multilevel non-volatile memory includes a massive sensing system that includes a plurality of sense amplifiers disposed adjacent subarrays of memory cells. The sense amplifier includes a high speed load, a wide output range intermediate stage and a low imp... | 02/27/2007 |
| 7148701 | Apparatus for measuring electrical impedance The present invention provides an apparatus for measuring electrical impedance comprising: two input electrodes contacted to a subject for measuring impedance; a difference amplifier to which two signals inputted to the two input electrodes are inputted; a device fo... | 12/12/2006 |
| 7103487 | Circuitry and methods for current measurements referred to a precision impedance Circuitry and methods for obtaining accurate measurements of current supplied by an integrated circuit are provided. Current calculations are performed using information from a precision termination resistor and from the ratio relationship of two on-chip resistors. ... | 09/05/2006 |
| 7071677 | Accurate and efficient sensing method for bi-directional signals An exemplary method and circuit for sensing bi-directional current through a resistive element comprises a sampling unit, a charge transfer unit, and an amplifier. The sampling unit is switchably coupled to the resistive element and samples and stores a voltage corr... | 07/04/2006 |
| 7015728 | High voltage floating current sense amplifier A high voltage floating current sense amplifier circuit, including first and second resistive devices and a floating amplifier circuit, that senses current through a current sense device coupled between an output node and a battery node each referenced to a common n... | 03/21/2006 |
| 6977513 | Current detection circuit of bidirectional switch A bidirectional main switch includes two main switches M1 and M2 formed of two main MOSFET'S Q1 and Q2, respectively; a bidirectional mirror switch including two mirror switches M3 and M4 formed of two mirror MOSFET'S Q3 | 12/20/2005 |
| 6944556 | Circuits and methods for current measurements referred to a precision impedance Circuitry and methods for obtaining accurate measurements of current supplied by an integrated circuit are provided. Current calculations are performed using information from a precision termination resistor and from the ratio relationship of two on-chip resistors. ... | 09/13/2005 |
| 6633167 | Signal supply apparatus and method for examining the same, and semiconductor device, electro-optical apparatus and electronic apparatus using the same In a signal supply apparatus such as might find use in an electro-optical device, signals that are supplied from multiple digital-to-analog converters are subject to impedance conversion by respective voltage followers, and provided as outputs to control ... | 10/14/2003 |
| 6621259 | Current sense amplifier and method A current sense amplifier (10) for measuring current flowing through a sense resistor (12) coupled between first (11) and second (13) terminals, respectively, of the current sense amplifier, the current sense amplifier includes a first amplifier (18) havi... | 09/16/2003 |
| 6603301 | Multiple range current measurement system with low power dissipation, fast setting time, and low common mode voltage error A multi-range measuring circuit for measuring a flow of electrical current between a first node and a second node. A measurement resistor is connected to the first node to develop a voltage having a high range output. A summing node connected in series wi... | 08/05/2003 |
| 6429641 | Power booster and current measuring unit A power booster and current measuring circuit provides a quiet, accurate voltage to a load (such as a transistor during parametric testing) with a load current of up to 1 ampere, and can measure that load current to an accuracy of &#b1;0.1 % over a range ... | 08/06/2002 |
| 6365914 | Semiconductor device provided with a built-in minute charge detecting circuit A semiconductor device has a minute charge detecting circuit and a test circuit for suppressing harmful influence of stray capacitance and external noises during detection of a minute electric charge. The minute charge detecting circuit is constructed of ... | 04/02/2002 |
| 5977824 | Circuit feedback loop with monitored loop gain A circuit arrangement includes a feedback loop, with a forward path and a feedback path, and a re-combining stage. A measuring circuit is provided to produce a measuring signal derived from a result signal and a feedback signal by linear combination.... | 11/02/1999 |
| 5818238 | Apparatus for measuring current and other parameters of an electornic device in response to an applied voltage A first terminal of a device-under-measurement (DUM) is connected to the input of a buffer amplifier having its output applied to the inverting input of an operational amplifier through a resistor having the value "aR". A resistor having a value "R" is co... | 10/06/1998 |
| 5619114 | Signal averager for use with motor controller A method and apparatus used with a motor controller for determining the average value of a voltage signal including at least two analog integrators that integrate the voltage signal during consecutive and alternating integration periods, a selector receiv... | 04/08/1997 |
| 5515001 | Current-measuring operational amplifier circuits An operational amplifier connected in series with a load and a current-measuring impedance and having at least two input ports and an output port, the output port of the operational amplifier further being directly connected to current-measuring impedance... | 05/07/1996 |
| 5483818 | Method and apparatus for detecting ionic current in the ignition system of an internal combustion engine A method and a circuit are provided for detecting low level ionic currents. An ionization detection voltage is applied to a spark plug and a resulting output voltage signal is sent to a threshold device. The output voltage signal is developed by a low off... | 01/16/1996 |
| 5392001 | Capacitively-coupled amplifier with improved low frequency response A capacitively-coupled amplifier circuit includes an amplifier for receiving an input signal via a coupling capacitance and for amplifying the input signal to produce an output signal. A resistor provides a bias voltage to the amplifier. The resistor is b... | 02/21/1995 |
| 5365200 | CMOS gauge driver An integrated circuit apparatus comprises a first stage amplifier and a second stage amplifier. The first stage amplifier is characterized by a cross-coupled integrated layout providing a rail-to-rail swing and a linear gain, A, substantially defined as A... | 11/15/1994 |
| 5341090 | Bidirectional, transconductance, DC amplifier having high output compliance voltage A bidirectional, transconductance, DC amplifier exhibiting a compliance voltage exceeding either of the DC power supply voltages nearly double the compliance voltage of conventional circuits. The circuit uses a differential input operational amplifier. A ... | 08/23/1994 |
| 5103390 | AC load simulator An AC load simulator for simulating the waveforms of capacitive reactance, inductive reactance, impedance or any waveform in an A.C. circuit for a better understanding and inspecting of the working status of an A.C. supply or a power part in a specific lo... | 04/07/1992 |
| 5034698 | Dual-path wideband and precision data acquisition system A dual path amplifier circuit configuration to obtain wideband and precision DC response includes a wideband voltage amplifier, an input termination, a virtual ground feedback amplifier, and a compensated attenuator. The circuit allows precision DC and wi... | 07/23/1991 |
| 4977367 | Range selector switch for ion chamber instrument An ion chamber type instrument for measuring radioactivity includes a high gain operational amplifier having a feedback network of range determining resistors connected between the amplifier output and input. Electronic switches in series with at least so... | 12/11/1990 |
| 4945445 | Current sense circuit A current sense circuit (100) includes a semiconductor power switch such as a MOSFET (102) having a source metallization contact pad (14) with a conductor jumper bond wire (106) directly connected thereto in the MOSFET module housing (104), which bond wir... | 07/31/1990 |
| 4935692 | Vector ammeter having digital signal processing unit An improved type of vector impedance measuring instrument is disclosed. The vector impedance is a vector current relative to (or normalized to) a pertinent voltage. A transducer for converting the impedance to corresponding current and voltage includes a ... | 06/19/1990 |
| 4928059 | Sinusoidal current sense and scaling circuit A circuit for providing a scaled sinusoidal voltage proportional to a sinusoidal current referenced to a first reference potential. The scaled sinusoidal voltage is referenced to a second reference potential. A scaling resistor is connected between an ope... | 05/22/1990 |
| 4833400 | High frequency multi-range attenuator having a high input impedance Attenuator having a high input impedance and several switching levels for high frequencies and oscilloscope and active probe comprising such an attenuator. A high frequency attenuator (15) having a high input impedance and several switching stages intende... | 05/23/1989 |
| 4771233 | Printed curcuit board lead ammeter An ammeter is used for measuring the current flowing through a lead on a printed circuit board having a four point probe contacting the printed wire under test. Each probe points is spring loaded and approximately one millimeter separates adjacent probe p... | 09/13/1988 |
| 4748406 | Circuit arrangement for controlling a rotary-magnet measuring instrument A circuit arrangement for controlling a rotary-magnet measuring instrument (6) by an input voltage via a controlled source of current has a first amplifier (difference amplifier 1) with a first negative-feedback resistor (R2) and a first input ... | 05/31/1988 |
| 4670663 | Guarded switches for component scanner A test voltage is applied through an array of "guarded" switches (58) to selected ones of a plurality of components to be measured. Each switch (58) comprises first and second input terminals (69, 72), first and second output terminals (70, 74), and a wir... | 06/02/1987 |
| 4659997 | Differential voltage measuring circuit Apparatus for measuring the difference between two voltages in which a first current proportional to the voltage difference is generated at a first point, and there is circuitry for delivering at a second point a second current that is based on the first ... | 04/21/1987 |
| 4658211 | Circuit for regulating the torque of ratio meters In order to maintain the torque of the ratio meter and the drive of amplifiers feeding it independently of the amplitudes of a sine signal voltage and a cosine signal voltage, a regulation is provided. The regulation makes use of two-quadrant voltage-cont... | 04/14/1987 |
| 4628277 | Femtoammeter A femtoammeter is disclosed which resists noise induced reversed bias of the ammeter amplifier and avoids long time constant recovery with unusually high measurement accuracy. The amplifier ammeter has a feedback loop which is provided with paired opposin... | 12/09/1986 |
| 4590547 | Active full-wave rectifier detector circuit Active full-wave rectifier circuit for a current transformer used for example in an earth leak detector circuit and comprising active components such as operational amplifiers and transistors to detect and process relatively weak output voltages.... | 05/20/1986 |
| 4270090 | D.C. Electrostatic voltage follower having ion-coupled probe An electrostatic voltmeter including a probe having a detector which is resistively coupled into a region bearing ionized air and an electrostatic field or potential to be measured. An ionization source in the form of a radioactive material is carried by ... | 05/26/1981 |
