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8179121 |
Bridge 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...
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8154275 |
Apparatus 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...
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8143881 |
Current 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...
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8129982 |
Voltage sensing circuits and methods for inverters
A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage....
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8067953 |
Semiconductor 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...
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8030915 |
Integrated 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;...
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8031045 |
Apparatus and method for an A/B RF redundant sensing switch
An A/B RF automatic-set-up redundant sensing switch that monitors the relative differences in signal strength of the A and B paths and processes it according to a predetermined logic setting with...
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7944196 |
RF detector with crest factor measurement
An RF detector configured to provide two outputs, one being a function of the true RMS power level of an RF input signal, and the other being a function of the instantaneous/peak power of the RF...
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7919959 |
Signal 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...
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7839137 |
Distributed 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...
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7794658 |
Open circuit delay devices, systems, and methods for analyte measurement
System, circuits, and methods to reduce or eliminate uncompensated voltage drop between an electrode of an electrochemical cell usable for analyte measurement. In one example, a system is provided...
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7786720 |
Passive mixer power detector method and apparatus
The power level of an RF signal is detected using a circuit having relatively low DC offset, high dynamic range, small frequency and temperature dependence and low flicker noise. According to one...
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7777479 |
Current detector with variable output voltage level
A current detector with variable output voltage level. The current detector includes an operational amplifier, an adjusting circuit, a load circuit for detecting current running therethrough, and a...
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7755348 |
Current 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...
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7719259 |
Temperature stable current sensor system
A current sensor system that uses a sensor resistor to sense current flow and in which the level of voltage drop across that resistor is used to control the current flow through another resistor,...
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7719258 |
Method and apparatus for current measurement using hall sensors without iron cores
A method and apparatus for current measurement using Hall sensors without iron cores, used to estimate a flowing current in an electric conducting cable are provided by the exemplary examples of...
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7701198 |
Power 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...
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7696742 |
Method 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...
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7683604 |
Amplifier 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...
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7675544 |
System and method for video transmission line fault detection
A video circuit including a video amplifier adapted to generate an amplified output video signal from an input video signal; a short detection circuit adapted to generate a first signal indicative...
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7659707 |
RF detector with crest factor measurement
An RF detector configured to provide two outputs, one being a function of the true RMS power level of an RF input signal, and the other being a function of the instantaneous/peak power of the RF...
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7652466 |
Buffer 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...
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7554319 |
Circuits and methods for voltage sensing
A voltage sensing circuit includes a voltage divider and a voltage rectifier. The voltage divider divides a first output voltage on a first output voltage line to a first divided output voltage....
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7538539 |
Current meter with reduced range switching and load transients
An ammeter for ATE instrumentation includes an amplifier, a first current measuring circuit coupled to the amplifier's power supply leads, and a second current measuring circuit coupled to the...
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7429856 |
Voltage 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...
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7385384 |
Diagnosis 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,...
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7135849 |
Extremal 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...
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6943540 |
Multiple-channel solenoid current monitor
An arrangement for monioring multiple channel solenoid currents wherein a plurality of separately controllable solenoid coils are coupled commonly by a single current measurement element to one...
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6937052 |
Sensing 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...
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6765377 |
Q-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...
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6734659 |
Electronic 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...
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6509743 |
Active 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...
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6462528 |
Method 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...
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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...
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6304096 |
Measuring device for measuring the intermediate circuit voltage of gradient amplifiers
A measuring device for measuring the intermediate circuit voltage of a gradient amplifier of a magnetic resonance imaging apparatus has a measuring circuit with a potential-dividing connection to a...
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6259243 |
Method 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...
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6133740 |
Chlorine 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...
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5650750 |
Common 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....
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5632280 |
Method 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....
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5621350 |
Circuit 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...
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5606249 |
Electrical 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...
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5572118 |
Charge 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...
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5546079 |
Output 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...
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5543706 |
Circuit 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...
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5451865 |
Method 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...
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5424677 |
Common 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...
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5378998 |
Current measurement circuits
A circuit for measuring current flowing along a line including a resistance has two transistors with their emitters connected to the line on opposite sides of the resistance and with their...
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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...
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5332963 |
High input impedance buffer with low feedback resistance
A high input impedance AC buffer for use in an instrument that does not require high frequency compensation or calibration. An op-amp receives an input signal that is to be measured via a high...
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5287055 |
Circuit for measuring current in a power MOS transistor
A circuit for measuring current in a power MOS transistor (M0) comprises second (M1) and third (M2) transistors in series of the same type and same technology as, but having a smaller surface than,...
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