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Class 324/123R - With amplifier or space discharge device


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter having an amplifier or having a space discharge
No. of patents: 103
Last issue date: 05/15/2012


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NumberTitleIssue Date
8179121Bridge sensor with collocated electronics and two-wire interface
A transducer, including: a housing; a bridge sensor circuit disposed within the housing and including at least one micro electro-mechanical systems (MEMS) sensing elements and first and second output ports; circuitry disposed within the housing; and an input/output ...
05/15/2012
8154275Apparatus and method for testing sense amplifier thresholds on an integrated circuit
An apparatus and method for testing sense amplifier threshold voltages on an integrated circuit includes one or more sense amplifier modules each including a number of sense amplifier circuits, a voltage generator unit, and detection logic. The voltage generator uni...
04/10/2012
8143881Current measuring apparatus for power supply
A current measuring apparatus includes a shunt circuit, a current detecting circuit, and a signal amplifying circuit. The current measuring apparatus applies the shunt circuit to receive a current to be measured. The current measuring apparatus applies the current d...
03/27/2012
8067953Semiconductor device for measuring ultra small electrical currents and small voltages
A semiconductor device for measuring ultra low currents down to the level of single electrons or low voltages comprises a first and a second voltage supply terminal, an input terminal for receiving an electrical current or being supplied with a voltage to be measure...
11/29/2011
8030915Integrated sensor with capacitive coupling rejection to the mechanical ground
An integrated sensor includes: i) a voltage regulator coupled with a mechanical ground and delivering a regulated voltage based on a primary power supply voltage referencing an electrical ground; ii) a high-impedance sensitive element powered by the primary power su...
10/04/2011
7919959Signal readout circuit of amperometric sensor
A signal readout circuit comprises a first amplifier, a second amplifier and first to fourth transistors. The signal readout circuit has a first electrode, a second electrode, and a third electrode. The signal readout circuit applied in a wide current-sensing range ...
04/05/2011
7839137Distributed RF/microwave power detector
A distributed RF/microwave power detector for detecting the power of a signal is provided. The distributed RF/microwave power detector includes a power detector on or at least partially embedded in a single substrate. The distributed RF/microwave power detector incl...
11/23/2010
7755348Current sensor output measurement system and method
Analog channel calibration methods, devices and systems are disclosed. One embodiment of the present invention pertains to a method for calibrating a channel offset of a current sensor which comprises measuring a channel offset native to a current sensor channel. Th...
07/13/2010
7701198Power measurement apparatus
A power measurement apparatus includes a radio frequency input terminal, a measurement module, an interface, a memory, and a control unit. The radio frequency input terminal is connected to a radio frequency device. The measurement module is connected to the radio f...
04/20/2010
7696742Method and circuit for reducing noise when measuring intensity of electric current
The measurement of a very low intensity of an electric current is carried out by 5 integrating the electric current over integration cycles having a time period ti and measuring a peak value of a sawtooth voltage at an integrated circuit output each time at the end ...
04/13/2010
7683604Amplifier topology and method for connecting to printed circuit board traces used as shunt resistors
An integrated circuit current shunt amplifier (2A) includes an amplifier (9) having a (+) input connected to a first terminal (5A) of a shunt resistor (RSHUNT). An output transistor (24) has a gate coupled to an output of the a...
03/23/2010
7652466Buffer circuit, amplifier circuit, and test apparatus
There is provided a buffer circuit that outputs a signal according to an input signal. The buffer circuit includes a first receiving transistor that receives the input signal through its base terminal, a first clamp transistor having polarity same as that of the fir...
01/26/2010
7429856Voltage source measurement unit with minimized common mode errors
A particular configuration of voltage source measurement (VSM) circuitry minimizes common mode errors in measurement of current through a device under test (DUT), even across a wide range of output voltages. The current IDUT is not affected by common-mode...
09/30/2008
7385384Diagnosis method for an antenna connection
A method for testing a reliable connection of an antenna includes a coil (L) or something similar connected to a reference potential on one side and to the output of an amplifier on the other side, a first capacitor (C2) arranged in a parallel position to the...
06/10/2008
7365528Method and apparatus of voltage measurement using flying capacitor and switching circuits
The present invention is to provide a method and apparatus of voltage measurement with a high resolution. An apparatus of voltage measurement includes: a buffer circuit for separating a voltage between terminals of a capacitor or an equivalent voltage into a first v...
04/29/2008
7253707Tunable active inductor
An active inductor capable of tuning a self-resonant frequency, an inductance, a Q factor, and a peak Q frequency by applying a tunable feedback resistor to a cascode-grounded active inductor is disclosed. The tunable active inductor includes a first transistor havi...
08/07/2007
7190173Impedance calibration circuit and method thereof
The present invention discloses an impedance calibration circuit and method for calibrating an equivalent impedance of a semiconductor circuit element. The disclosed impedance calibration circuit includes a reference circuit, a second circuit element, and a controll...
03/13/2007
7161442Latch system comprising an action module to increase negative resistance
A latch system used for providing a negative resistance. It includes a current source module used for providing at least one DC current. The latch system also includes a first cross-coupling module, which contains a first inverter, a second inverter, and an action m...
01/09/2007
7135849Extremal voltage detector with high input impedance
An extremal voltage detector produces an output voltage from an operational amplifier having its non-inverting input terminal connected to a first node and its inverting input terminal connected to a second node. A number of identical metal-oxide-semiconductor field...
11/14/2006
7132915Ferrite assembly
A ferrite assembly has a first conductor and a number of ferrite members. Each of the number of ferrite members has a core. The ferrite members are in electrical communication with the first conductor. The ferrite assembly has a number of current dividing members in...
11/07/2006
7071674Micro-electrometer
A voltmeter for measuring atmospheric or other voltages eliminates the dead band without application of high voltages or radioactive isotopes to increase conductivity in the region of the probe. A vacuum tube is operated at substantially reduced conduction in order ...
07/04/2006
7015809Method and system for providing an active routing antenna
An array antenna is disclosed. In one embodiment, the array antenna facilitates transmission of data with amongst fixed radio units. The array antenna includes a number of antenna panels arranged in an hexagonal shape, one or more array control elements controlling ...
03/21/2006
6937052Sensing services and sensing circuits
A current sensing circuit includes a differential current input stage connected to a differential voltage output stage. The differential current input stage includes a reference current input from a current source and a sensor current input from a sensing device; a ...
08/30/2005
6788043Lightning detection and data acquisition system
A lightning detection and data acquisition system. A plurality of remote programmable sensor is utilized to detect cloud to ground and IC lightning strikes. Analog representations of the lightning strikes are converted to digital signals. The digital signals are cla...
09/07/2004
6765377Q-emphasized amplifier with inductor-based bandwidth booster
A buffer employs an input stage with an active, LC load. The active load includes integrated inductors that combine with the parasitic gate capacitances of a pair of transistors in a negative-transconductance (−Gm) booster configuration. The resulting active load ...
07/20/2004
6734659Electronic interface for use with dual electrode capacitance diaphragm gauges
Systems and methods for determining differential currents in a pair of circuits. In a preferred embodiment, an excitation voltage and a tightly coupled differencing current transformer are coupled to a differential capacitance manometer to generate a differential cu...
05/11/2004
6509743Active load or source impedance synthesis apparatus for measurement test set of microwave components and systems
An active load or source impedance synthesis apparatus for experimental characterization of electronic components (E) working in the range from 500 MHz to 110 GHz, includes an active loop with at least one amplifier (Am), one magnitude and phase control s...
01/21/2003
6462528Method and apparatus for probing a conductor of an array of closely-spaced conductors
A method and apparatus for probing a terminal of a ball grid array device, or a conductor of an array of closely-spaced conductors, preferably employs a buried tip resistor located substantially adjacent to the point to be monitored. In this way, a relati...
10/08/2002
6365914Semiconductor 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
6259243Method for electromagnetically shielding inductive voltage detectors
The method of this invention provides a means for altering commonly available inductive voltage detector instruments into dual sensitivity test instruments. By shielding the sensor probe with a metallic material, the probe is made to be unresponsive to en...
07/10/2001
6133740Chlorine specific gas chromatographic detector
A method and apparatus are set forth which enables a gas chromatographic column output to be connected with a pulse discharge chamber in which chemically bound chlorine in volatile organic or inorganic samples is measured. A spark discharge is formed in t...
10/17/2000
5650750Common mode signal and circuit fault detection in differential signal detectors
The present invention is an apparatus and method for detecting differential mode signals in an environment where differential mode signals co-exist, and might be corrupted by, common mode signals. The most basic apparatus of the present invention essentia...
07/22/1997
5632280Method for circuit fault detection in differential signal detectors
The present invention is an apparatus and method for detecting differential mode signals in an environment where differential mode signals co-exist, and might be corrupted by, common mode signals. The most basic apparatus of the present invention essentia...
05/27/1997
5621350Circuit for amplifying a weak dircet voltage signal
A circuit for amplifying a weak direct voltage signal has a direct voltage amplifier that can be periodically switched from the direct voltage signal to a reference signal by a switching member connected to its input terminals. The circuit also has a meas...
04/15/1997
5606249Electrical apparatus with wide dynamic range for monitoring and protecting electric power systems
Electric apparatus responsive to currents and/or voltages having wide dynamic ranges incorporates ranging circuits for each input in which a multiplexer providing the ranging selection has a common input connected to the output of an operational amplifier...
02/25/1997
5572118Charge rate electrometer including means for substantially eliminating leakage currents
The disclosed electrometer is of the type including an integrating amplifier and an electronically controlled switch. When the switch is closed, the electrometer is reset or cleared, and when the switch is open, the amplifier operates as an integrator. Th...
11/05/1996
5546079Output circuit arrangement integrated in an integrated electric circuit for supplying an output signal determined by user selectable parameters
An output circuit in which both the signal type (i.e., current or voltage) as well as the signal level range (for example, 0 to 10 V, -10 V to +10 V) are based on user input parameters. The circuit is integrated in an application-specific integrated circu...
08/13/1996
5543706Circuit and method for measuring current in a circuit
An electronic circuit for measuring current in a working circuit is provided with a first operational amplifier having a positive input, a negative input, and an output connected to at least one in-line amplifier to form a first current path. A second ope...
08/06/1996
5451865Method and apparatus for sensing an input current with a bridge circuit
A current sensor includes first and second branches interconnected by a center conductor magnetically coupled to an annular current comparator for producing an output signal related, in magnitude and phase, to an input current. The input current divides, ...
09/19/1995
5424677Common mode error correction for differential amplifiers
Common mode error correction for differential amplifiers involves accurately measuring both the input and output of an amplifier using a low-leakage measurement path, and calculating common-mode gain. Two measurements are made at each node by appying two ...
06/13/1995
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