55results about "Resistors adjusted by short-circuiting resistive elements" patented technology

The invention discloses a potentiometer. The potentiometer comprises a resistive element, an insulation base supporting the resistive element, an electric brush and a rotating handle driving the electric brush to rotate, wherein the resistive element is circular-fan-shaped, a first limiting baffle block and a second limiting baffle block are respectively arranged at two end parts of the resistive element, the electric brush and the rotating handle are installed at the circle center of the resistive element, the section of the electric brush is step-shaped; the thickness of the part, close to the resistive element, of the electric brush is greater than the thickness of part, close to the rotating shaft, of the electric brush; a plurality of raised adjusting gear blocks are arranged between the first limiting baffle block and the second limiting baffle block along the arc-shaped circumferential surface of the insulation base, and a positioning groove positioned above the raised gear adjusting blocks is formed in the rotating handle. The rotating handle drives the electric brush to rotate to adjust the value of resistance, so that unnecessary friction during rotating process of the electric brush is effectively reduced, the raised adjusting gear blocks are used for adjusting and controlling gears, and the second rotating shaft can move up and down relative to the first rotating shaft, so that gear locking and adjusting is realized.

The device for detecting and tracking a status of a device under laser trim includes: a series connected string of trim tracking links; and a plurality of detecting devices wherein each detecting device is coupled in parallel with a corresponding trim tracking link. This device allows detection of laser beam to work surface misalignment and the termination of lasing before critical active circuit components can be damaged.

A method of manufacturing a ferromagnetic tunnel junction element, having an insulating film, a first ferromagnetic film and a second ferromagnetic film, including a step of turning the ferromagnetic tunnel junction element on electricity for a given period before a practical operation of the ferromagnetic tunnel junction element, so that a resistance of the insulating film is stabilized.

A variable potentiometer with a wiper terminal and first and second terminals has relay switches for shorting or for unshorting resistors. When resistance is reduced between the wiper and one of said terminals, resistance is increased between the wiper and another terminal. In one embodiment two strings of resistors with the same nominal values are used between the wiper and the terminals. In another embodiment, a single string of resistors are used and are switched into either the electrical connection between the wiper and the first terminal or between the wiper and the second terminal. When resistance is lowered between the wiper and one of said first or second terminals a first resistor is replaced with a first short circuit and when resistance is increased between said wiper and another of said first and second terminals a second short circuit is replaced with the first resistor.

The invention discloses a protective resistor for use in an ultrahigh-voltage very fast transient overvoltage test, which comprises a connecting flange, a resistor body, middle uniform rings and end uniform rings, wherein the resistor body comprises an insulating barrel which is wounded with at least two layers of resistance wires; both of the two ends of the insulating barrel are connected with a connecting flange by a middle uniform ring; the other end of each connecting flange is connected with an end uniform ring; spiral grooves are formed on the outside surface of the insulating barrel; the resistance wires are wound in the spiral grooves; and the outside surface of the insulating barrel is wounded with an epoxy glass silk ribbon and cured after being wounded with each layer of resistance wires. When the embodiment of the invention is used, the structural deformation or insulation damage of the protective resistor used outdoor are prevented.

A high Q on-chip inductor includes a primary winding and an auxiliary winding that is coupled to receive a proportionally opposite representation of an input of the primary winding. Further, the auxiliary winding has an admittance that is greater than the admittance of the primary winding thereby yielding an asymmetry in the admittances. As such, a push / pull mechanism is obtained in a 2-port system (e.g., 1st and 2nd nodes of the primary winding) that produces a large Q factor for an on-chip inductor.

The invention belongs to the technical field of electric parameter measurement, and provides a shunting element for a printed circuit board. The shunting element is formed by bending a strip-type metal sheet, wherein at least one notch is formed in each of the opposite first and second ends of the strip-type metal sheet, so that the first end is divided into at least one first-type pin and at least one second-type pin, and the second end is divided into at least one third-type pin and at least one fourth-type pin; the width of the first-type pin is greater than that of the second-type pin, and the width of the third-type pin is greater than that of the fourth-type pin. The shunting element is integrally machined by using the strip-type metal sheets, and is simple in structure; the resistance of a finished product is not required to be regulated, so that manufacturing procedures are simplified; at the same time, a conventional terminal sheet part is rreduced, so that a resistance value can be increased or decreased according to actual needs, and the shunting element is high in flexibility; moreover, a welding procedure is not required, so that the shunting element has the advantage of small temperature drift.

A variable potentiometer with a wiper terminal and first and second terminals has relay switches for shorting or for unshorting resistors. When resistance is reduced between the wiper and one of said terminals, resistance is increased between the wiper and another terminal. In one embodiment two strings of resistors with the same nominal values are used between the wiper and the terminals. In another embodiment, a single string of resistors are used and are switched into either the electrical connection between the wiper and the first terminal or between the wiper and the second terminal. When resistance is lowered between the wiper and one of said first or second terminals a first resistor is replaced with a first short circuit and when resistance is increased between said wiper and another of said first and second terminals a second short circuit is replaced with the first resistor.

A method of providing a variable resistance from a resistive member including a resistive resilient material comprises electrically coupling a first conductor with the resistive member at a first contact location over a first contact area; and electrically coupling a second conductor with the resistive member at a movable second contact location over a second contact area. The second contact location is movable relative to the resistive member to change the second contact location between the second conductor and the resistive member, the first contact location and the movable second contact location being spaced from one another by a distance. The method further comprises changing at least one of the first location, the second location, the first contact area, and the second contact area to produce a change in resistance in the resistive member, measured between the first conductor at the first contact location and the second conductor at the second contact location, as the resistive member deforms along the second conductor.

The invention relates to a program-controlled multi-channel variable resistor and a resistance value adjustment and control method thereof. The variable resistor comprises a communication interface, a multi-channel resistance output interface, a single-chip microcomputer and at least one single channel, wherein the communication interface is connected with an upper computer of a control system, each single channel comprises a digital potentiometer and an electro-static discharge protection chip which form a series branch, communication is carried out between the single-chip microcomputer and a serial port conversion module by a universal asynchronous receiver / transmitter (UART) three-wire interface mode, the single-chip microcomputer and the digital potentiometers are arranged through an I<2>C communication mode, or the tap position or the resistance value of the current digital potentiometer are read. The adjustment and control method comprises the following steps of 1) testing a serial port; 2) carrying out direct program-controlled reading and adjustment on the resistance value of the digital potentiometer of an appointed channel; and 3) periodically calibrating the resistance value of the digital potentiometer of each channel by a multimeter. The program-controlled multi-channel variable resistor and the resistance value adjustment and control method thereof have the advantages of simplicity in composition, convenience in use and accurate and reliable resistance value, the embedded software of the single-chip microcomputer can use the resistance value correction linear coefficient of each channel to automatically correct the resistance value, and the accuracy of the resistance value of the variable resistor is guaranteed.

The invention discloses a slide rheostat. The slide rheostat comprises a base and a turntable, wherein an annular conductor is fixedly arranged on the base, a plurality of sub conductors are distributed on the periphery of the annular conductor at intervals, the turntable is rotatably connected with the base, two metal slide sheets are arranged on the turntable, one ends of the two metal slide sheets are electrically connected with the annular conductor, the distance between the other ends of the two metal slide sheets is greater than the interval between two adjacent sub conductors, when the turntable rotates, the other ends of the two metal slide sheets are simultaneously electrically connected with the same sub conductor, the annular conductor is connected with a current input end through a common resistor, and each sub conductor is connected with a current output end through a resistor. The two metal slide sheets of the slide rheostat can rotate clockwise, and also can rotate anticlockwise, the rotation angles are not limited within 360 degrees, and the use is relatively convenient and flexible; after the slide rheostat is applied to an electronic product, the electronic product is relatively convenient to use, so that the user experience on the electronic product is improved.

The invention discloses a numerical control rheostat based on a weighting switching network, which comprises the weighting switching network and a numerical control resistor. The weighting switching network receives an N bit binary digital signals, the N is a positive integer, the numerical control resistor comprises 2N resistors which have equal ohms and are sequentially connected in series, the weighting switching network comprises N analogue switches, each analogue switch receives one bit binary digital signals, obtains respective weight according to weight of the received binary digital signal and then is in parallel connection with the resistors which have the quantity equal to the weight and are sequentially in series connection, and each resistor is in parallel connection with one analogue switch at most. The numerical control variable resistance can be achieved by the weighting switching network formed by the N analogue switches only, and cost is greatly reduced.

An input device has a circular arc resistive layer and a metal plate as a conductive layer that is faced to the circular arc resistive layer, and can detect a position operated by partial contact between them. The input device has an element unit where a linear insulating layer as a contact preventing unit for preventing both ends of the circular arc resistive layer from simultaneously coming into contact with the metal plate during operation is disposed on one end of the circular arc resistive layer.

The invention discloses a resistance box, which comprises a box body, a plurality of resistance turntables, an output high end and an output low end. Each resistance turntable comprises a resistance disc, a character disc and a rotary switch. The resistance turntable and the character disc are arranged in the box body. The rotary switch comprises a first rotating shaft used for placing a dial, a second rotating shaft used for placing a resistor disc, and a coupling connecting the first rotating shaft and the second rotating shaft. The box body comprises a display panel, and the display panel is provided with an indication window used for displaying numerical values on the character disc. The resistor disc comprises a plurality of resistors connected in series, a plurality of connecting contact pieces arranged at the two ends of each resistor respectively, two contact switches and two wiring terminals connected with the output ends connected in series, first contacts of the two contactswitches are fixedly connected with a second rotating shaft, and second contacts of the two contact switches are movably connected with the connecting contact pieces. The two wiring terminals of the plurality of resistance discs are connected in series, and the output ends of the series connection are respectively connected with the output high end and the output low end. According to the invention, data reading can be carried out conveniently, and carrying is convenient.

An integrated circuit system, and a method of manufacture thereof, includes: an integrated circuit substrate; and a discretized tunable precision resistor having a total resistance including: a resistor body over the integrated circuit substrate, interconnects directly on the resistor body, metal taps directly on the interconnects and at opposing sides of the resistor body, and conductive metal strips over the interconnects, wherein the total resistance is a function of an active resistor length of the resistor body between a pair of the metal taps in contact with two of the conductive metal strips.

The invention relates to the technical field encoder parts and particularly relates to a potential encoding integrated structure. The potential encoding integrated structure comprises an electric brush plate and a resistance carrier plate, wherein the electric brush plate is used for conducting electricity; one side of the resistance carrier plate is provided with a conducting ring and a plurality of conducting strips surrounding the conducting ring; the other side of the resistance carrier plate is provided with a plurality of welding holes corresponding to the conducting strips; the welding holes are electrically connected with the corresponding conducting strips; and a resistor is electrically connected between every two adjacent welding holes. Through the arrangement, integration of the encoder and a potentiometer is realized, i.e. the encoder and the potentiometer are combined into one whole body; better conditions are created for saving limited space of electronic equipment and reducing the size of the electronic equipment; the potential encoding integrated structure has a simple structure, is low in cost and provides conditions for integration of the encoder and the potentiometer.

The present invention provides a digitally controlled rheostat device, comprising a first port A, a second port B, and a voltage regulation circuit connected between the first port A and the second port B. The voltage regulation circuit includes: a standard resistor R, a compensation voltage source US and a digitally controlled voltage source U with a variable output voltage. The compensation voltage source US uses an anti-phase follower circuit 2 to offset the voltage drop at both ends of the standard resistance R; wherein, one end C of the standard resistance R is connected to the first port A, and the other end D is connected to the first port A. The output terminal US- of the compensation voltage source is connected; the reference ground terminal US+ of the compensation voltage source US is connected to the reference ground terminal U+ of the digital control voltage source U; the output terminal U- of the digital control voltage source is connected to the The second port B is connected; the output terminal US_ of the compensation voltage source US is connected to the reference input terminal of the digital-to-analog conversion circuit 3 in the digital-control voltage source to provide a reference terminal voltage for the digital-control voltage source. The above device has the advantages of stable analog output resistance, adjustable resolution and wide range of analog resistance.

The invention discloses a method for giving an output resistance value of a series and parallel combination, and aims to provide a method, which is rapid in giving and high in accuracy and is accurate, for giving the output resistance value of the series and parallel combination. The method is implemented according to the following technical schemes of taking 100 ohm as an interval value, and employing and connecting four 200-ohm resistance units and a 100-ohm resistance unit in series to form a hundred-resistance combination body having arithmetic progression resistance and having access circuit range being 0-900 ohms; taking 10 ohm as an interval value, and connecting in series to form a decade-resistance combination body with access circuit range being 0-90 ohms according to the mode; taking 1 ohm as an interval value, and connecting in series to form a unit-resistance combination body with access circuit range being 0-9 ohms according to the mode; and taking 0.1 ohm as an intervalvalue, and connecting in series to form a decile-resistance combination body with access circuit range being 0-0.9 ohms according to the mode so that the maximum value is 900+90+9+0.9=999.9 ohms, wherein the minimum resolution is given by a 0.1-ohm resistor.

The invention provides a numerical control variable-resistance device. The numerical control variable-resistance device comprises a first port A, a second port B and a voltage adjusting circuit connected between the first port A and the second port B. The voltage adjusting circuit comprises a standard resistor R, an offset voltage source US and a numerical control voltage source U with the variable output voltage. The offset voltage source US is used for offsetting voltage drop at the two ends of the standard resistor R through a reversal-phase follow circuit (2), wherein one end C of the standard resistor R is connected with the first port A, and the other end D of the standard resistor R is connected with the output end US- of the offset voltage source; the reference ground wire end US+ of the offset voltage source US is connected with the reference ground wire end U+ of the numerical control voltage source U; the output end U- of the numerical control voltage source is connected with the second port B; the output end US- of the offset voltage source US is connected with the reference input end of a digital-to-analogue conversion circuit (3) in the numerical control voltage source to provide the reference end voltage for the numerical control voltage source. The numerical control variable-resistance device has the advantages that the simulation output resistance is stable, the definition is adjustable, and the simulation resistance scope is wide.

The device for detecting and tracking a status of a device under laser trim includes: a series connected string of trim tracking links; and a plurality of detecting devices wherein each detecting device is coupled in parallel with a corresponding trim tracking link. This device allows detection of laser beam to work surface misalignment and the termination of lasing before critical active circuit components can be damaged.

A hydraulic driving rheostat comprises a thin tube. A resistor stripe, a mercury column and medium liquid are arranged in the thin tube, the mercury column is arranged in the middle of the resistor stripe, the medium liquid is arranged on two sides of the mercury column, a first piston is arranged at one end of the thin tube, a second piston is arranged at the other end of the thin tube, the first piston and the second piston change the thin tube into a closed hydraulic transmission device, the resistor stripe is communicated with the exterior of the thin tube, and changes of resistance valves at two ends of the resistor stripe are formed by measuring movement of the mercury column on the resistor stripe to cause short circuit of mercury on different portions of a resistor to reflect change situations of the first piston and the second piston. The hydraulic driving rheostat has the advantages of being high in flexibility and low in cost of construction.

The invention discloses a rotatably controlled electronic switch. The rotatably controlled electronic switch comprises a shell; a horizontally arranged threaded rod is rotatably installed in the shell; a vertically arranged movable plate is in threaded installation outside the threaded rod; one end of the threaded rod extends to the exterior of the shell; two guide holes are formed in the movableplate; two horizontally arranged guide rods are fixedly installed in the shell; the guide rods pass through the movable plate through the guide holes; a horizontally arranged metal strip is fixedly installed in the shell; the metal strip is positioned over the movable plate; furthermore, a first sliding opening is formed in the metal strip; a second sliding opening is formed on the top of the shell; the first sliding opening corresponds to the second sliding opening; an installation cover is fixedly installed on the top of the shell; a vertically arranged metal rod is fixedly installed on thetop of the movable plate; and the top of the metal rod extends into the installation cover through the first sliding opening and the second sliding opening. The rotatably controlled electronic switchdisclosed by the invention is smart in structure, simple in structure, convenient to operate and low in manufacturing cost and maintenance cost, and has the multi-level adjustment effect.

A method of controlling a current path range using an electric field is disclosed, and the method of controlling a current path range includes applying an electric field to an active layer including a spontaneous polarization material through an application electrode disposed adjacent to the active layer to form a polarization region of the active layer, and forming a variable low resistance region corresponding to a boundary of the polarization region, wherein the variable low resistance region is a region of the active layer having a lower electrical resistance than another region of the active layer adjacent to the variable low resistance region and allows an electrical path to be formed.

A chip component is provided with a block including a dielectric, input and output terminals, which are the first and second terminals that are provided on the surface of the block, an adjustment terminal that is a third terminal that includes an internal electrode extended into the block and that is provided on the surface of the block, and at least two inter-terminal circuits that are provided in the block and that are connected between at least two sets of two terminals of the first, second, and third terminals.

The invention provides an adjustable resistor with low cost and high precision. The adjustable resistor comprises an MCU, a short circuit switch and an adjustable resistor module, wherein a group of resistance output interfaces are arranged at the output end of the adjustable resistor module, the short circuit switch is connected to the opening side of the adjustable resistor module in parallel, and a group of SOUT switches are serially connected between the short circuit switch and the resistance output resistances; and the short circuit switch, the adjustable resistor module and the SOUT switches are connected with the MCU respectively. The invention also provides a control method corresponding to the adjustable resistor. The adjustable resistor has the advantages that various devices inthe digital adjustable resistor can be realized by using common devices, the selective range of resistance value is wide, the selection cost of resistors is low, and moreover, resistance output withsuperhigh precision can be further realized.

A small inexpensive two terminal variable resistance assembly that conveniently changes its resistance when a force of an actuator is applied. It can be made for power applications as well as in miniature dimension versions in values from milli-ohms to meg-ohms.This variable resistor increases its power handling capacity during a decrease in its ohmic value, contrary to present three terminal potentiometers or reostats. It does this by a rolling action that increases or decreases two resistive surface areas in parallel. It could also be used as a variable capacitor.

A touch-type variable resistor structure includes a resistor-base plate, a conductive base plate and a separator member. The resistor-base plate further includes a main plate body and a resistance layer. The resistance layer extended along an extension direction is located on the main plate body. The conductive base plate located on the resistor-base plate includes an electricity-conductive layer facing the resistor-base plate. The separator member located between the resistor-base plate and the conductive base plate further has a central opening. One of the main plate body and the main conductive plate body is formed as a flexible-touch base plate. While the flexible-touch base plate is depressed, part of the electricity-conductive layer would pass through the central opening to electrically couple the resistance layer.

The subject matter of this specification can be embodied in, among other things, an identification system includes a first component having a first resistor and a second resistor, a second component having a sensor configured to sense a voltage difference between a first bus and a second bus and a selector signal output port configured to provide a first selector signal and a second selector signal, and a third component having a switching network configured to electrically connect the second bus to the first bus across one or both of the first resistor and the second resistor in response to the first selector signal, and electrically connect the second bus to the first bus across a different one of the first resistor or the second resistor in response to the second selector signal.

A small inexpensive two terminal variable resistance assembly that conveniently changes its resistance when a force of an actuator is applied. It can be made for power applications as well as in miniature dimension versions in values from milli-ohms to meg-ohms. This variable resistor increases its power handling capacity during a decrease in its ohmic value, contrary to present three terminal potentiometers or reostats. It does this by a rolling action that increases or decreases two resistive surface areas in parallel. It could also be used as a variable capacitor.