478results about "Altering measuring range circuits" patented technology

An integrated circuit can have a first substrate supporting a magnetic field sensing element and a second substrate supporting another magnetic field sensing element. The first and second substrates can be arranged in a variety of configurations. Another integrated circuit can have a first magnetic field sensing element and second different magnetic field sensing element disposed on surfaces thereof.

A method for continuously controlling color of a display device comprises the steps of receiving three sets of data respectively representing the portions of three primary colors, accumulating three counts in accordance with the data, respectively, and setting three bistable devices for the respective durations of the accumulating. The outputs of the three bistable devices are coupled for respectively energizing three buses, to which the light emitting diodes of three primary colors are connected in accordance with their colors, for controlling the portions of the light signals of the primary colors emitted therefrom.

In one embodiment a method of operating a mobile device includes sensing either an orientation or a movement of the mobile device, determining a command based on the sensed orientation or sensed movement, sensing a proximity of an object in relation to at least a portion of the mobile device, and executing the command upon the proximity of the object being sensed. In another embodiment, a method of operating a mobile device governs a manner of interaction of the mobile device relative to one or more other mobile devices. In at least some embodiments, at least one of the mobile devices includes an accelerometer and an infrared proximity sensor, and operation of the mobile device is determined based upon signals from those components.

An electronic accessory assembly to be used with a host electronic instrument provides previously recorded data from a non-volatile memory as to the accessory's operational capabilities. This memory is accessed by a host device either when the host device is powered up, or when an new accessory is connected to the host device. The host device then uses this information along with the operational requirements of the user to set the operational parameters of the accessory/host combination to optimally perform the functions required by the user.

A new Utility Meter and Display System for reading and displaying utility usage information within a building structure. The inventive device includes an encasement, a microprocessor within the encasement, a display, a keypad, and a printer within the encasement for printing selected information for the user. The microprocessor is electronically connected to a water meter, an electric meter, a gas meter and a telephone for reading the usage of the various utilities. The printer is electronically connected to the microprocessor for printing out selected screens on the display. The inventive device preferably includes a modem within for receiving billing information from the utility companies for determining the current rates.

The invention discloses a weak current detection device for radiation detection, which is used for detecting large dynamic weak current and requires recording and displaying measured data in real time. The device comprises a DC power module, a weak current amplifying and I/V switching circuit, an A/D conversion circuit, a central control unit, a range selection switching circuit and a user terminal, wherein the central control unit is used for finishing the functions of data processing, range switching and data communication; and the range selection switching circuit realizes automatic range selection by selecting a feedback channel of a feedback network. The weak current detection device realizes automatic range switching, adopts a T-shaped resistance network structure in a feedback network of the weak current amplification and an I/V switching circuit U2, improves the equivalent resistance of the feedback network and avoids the temperature drift and capacitive reactance influence brought by high impedance generally. Therefore, the technical problems that the conventional weak signal measurement equipment has low range, slow response, low resolution, and the like, so that the precision reaches 0.1pA or below and the resolution is 10fA.

Provided is a measurement apparatus that measures a current flowing through a load, including a power supply section that outputs a current supplied to the load; a current measuring section that measures a load current flowing between the load and the power supply section; a switch that is connected in parallel with the current measuring section between the load and the power supply section; and a control section that disconnects the switch during measurement of the load current and connects the switch when the load current falls outside of a predetermined reference range.

A simplified user interface for an electronic test and measurement device comprises an arrangement of a segmented LCD device and a plurality of keys used to implement a softkey system, in combination with a single AMPs input connector and a rotary selector having only a single position for each basic kind of parameter to be measured. The segmented LCD device includes, at each location adjacent to a key, a plurality of segments representing a vertically-arranged list of functions to be controlled. In one embodiment of the invention, the housing of the electronic test and measurement device is fabricated to have finger-like projections overlaying a portion of the LCD screen for creating the appearance of the continuation of displayed LCD softkey separation lines.

An electronic gas sensor signal conditioner which can automatically adapt to a wide variety of commercial off-the-shelf sensors and provide a digital output in a standard, easily used format. The signal conditioner has analog and digital sections. The analog section includes a sensor excitation sub-section and a signal amplification sub-section. The digital section comprises a microcontroller and controls the analog section. The digital section also converts the signal from the analog section into digital form, reads the sensor TEDS (Transducer Electronic Data Sheet), applies calibration constants and converts the signal into a standard, easily readable digital format.

A digital multi-meter (DMM) is described which can be inserted into a peripheral device card expansion slot of a personal digital assistant (PDA) to provide the PDA with DMM functionality. The DMM is configurable by configuration data supplied by application software running on the PDA. Configuration of the DMM may include, for example, setting measurement function and input ranges. The DMM internal circuitry measures input signals, digitizes them and supplies them to the PDA for display and/or storage. This allows for a data acquisition unit which combines a DMM with the computing power of a PDA. The PDA may be programmed to display or store data in a multitude of ways, depending on the requirements of a particular application. The combined DMM and PDA may benefit from various other functions of the PDA, for example wireless communication of data to allow remote data logging.

Electronic testing devices such as multimeters, and probes therefor. The probes may have off-device display devices attached thereto. The display devices may be non-detachably attached to the probes. In an aspect, conductive pathways to carry probe signals and display signals may be run in parallel or be integrated and may be coupled with a common port or hole of the electronic testing device. In an aspect, a hinge may be used to attach the display devices to the probes. In an aspect, the display device may be attached to a side of the probe to facilitate viewing of the display by a user.

The invention discloses a multichannel voltage collecting device and method. The device of the invention comprises filtering discharge units, multichannel switching units, logic control units and processor units, wherein the number of the filtering discharge units is the same as that of voltage modules to be detected, and the filtering discharge units are respectively connected with the voltage modules to be detected; the multichannel switching units are connected with the filtering discharge units; the logic control units are respectively connected with the multichannel switching units and is used for generating channel switching control signals for the multichannel switching units to carry out voltage collecting channel switching control; and the processor units are respectively connected with the multichannel switching units and the logic control units and is used for processing the collected voltage and controlling the logic control units to generate the channel switching control signals. In the invention, by filtering the output voltage of a power supply module to be detected, when in in transmission, space common mode interference and line transmission interference born by the output voltage of the power supply module to be detected are eliminated; and by switching on and switching off an optical coupler relay control channel, the invention has the characteristics of fast velocity response, short stabilization time, good linearity and long service life.

The invention discloses a current detecting device and method, relating to the field of power electronics. According to the invention, the purpose that one manufactured board is used for detecting current values of different ranges is achieved; the kinds of the manufactured boards are reduced; and therefore, the cost of production, management and maintenance is reduced. The current detecting device comprises a current sensor, a first to an Nth loading units, a controller and an AD(Analog-to-Digital) detecting unit, wherein N is a natural number of 2 or more than 2; the controller is used for respectively controlling switching on or switching off of first to the Nth switching units when the value of detected current belongs to different detecting ranges so that the first to the Nth resistance units form loads adapting to the detecting ranges; the detecting ranges are divided according to the value of the detecting current; and the AD detecting unit is used for sampling the voltage of the loads formed by the first to the Nth resistance units to obtain a load voltage value and computing to obtain the value of current to be detected according to the load voltage value.

A direct current measuring device comprising at least one first magnetic sensor and at least one second magnetic sensor sensitive to a magnetic field generated by an electric current flowing in a conductor. The measuring device comprises a processing unit connected to the magnetic sensors and designed to generate an output signal dependent on the measurement signals supplied by the magnetic sensors. Said processing unit comprises selection means supplying the output signal dependent, for weak electric currents on the first measurement signals from at least one first magnetic sensor, and dependent, for strong electric currents, on the second measurement signals from at least one second magnetic sensor.

A device for measuring current comprises a magnetic field sensor (2) for measuring the magnetic field produced by a current I flowing through a current conductor (1) and a yoke (3) of a magnetic material with a relative permeability of at least 100. The magnetic field sensor (2) preferably comprises a semiconductor chip with at least one Hall element and an electronic circuit for the operation of the Hall element. Two magnetic field concentrators (7, 8) separated by an air gap (6) are arranged on a surface of the semiconductor chip such that field lines (9) of the magnetic field (see FIG. 3) that issue from the first magnetic field concentrator (7) in the vicinity of the air gap (6) and impinge on the second magnetic field concentrator (8) in the vicinity of the air gap (6) pass through the at least one Hall element. The yoke (3) consists of an oblong piece of sheet metal or a laminate of sheet metals with two ends (10, 11) that has been brought by bending into a form with which the front sides of the ends (10, 11) of the yoke (3) lie opposite each other and are separated by an air gap (14). The ends (10, 11) of the yoke (3) are tapered so that a width of the ends of the yoke is less than a width of the yoke.