Abstract: The present invention provides a Gamma voltage generation circuit and method and a data driver. The circuit includes multiple resistors connected in series, configured to generate multiple candidate voltages corresponding to non-linear regions of a voltage-light transmissivity curve, the number of the multiple candidate voltages being more than the number of Gamma voltages corresponding to the non-linear regions of the voltage-light transmissivity curve; and voltage selectors connected to common ends of every two adjacent resistors of the multiple resistors, configured to select at least one candidate voltage from the multiple candidate voltages as the Gamma voltage(s) corresponding to the non-linear regions of the voltage-light transmissivity curve so that an actual Gamma curve coincides with an ideal Gamma curve, each common end corresponding to a candidate voltage.

Abstract: A display device having a data voltage generation circuit and a common voltage generation circuit that are both coupled to a common reference voltage is provided. By utilizing a common ground, variations between the data signals relative to the common voltage may be reduced, thereby improving voltage precision and color accuracy. In one embodiment, the data voltage generation circuit may be a gamma adjustment circuit that utilizes a resistor string having a center grounding point. The common voltage generation circuit may share the resistor string and the grounding point with the gamma adjustment circuit. Thus, data voltage signals and common voltage signals may be derived based on the same voltage reference point. Further, by sharing the resistor string, the total number of circuit components in the display device may be reduced, thereby reducing overall chip area and/or manufacturing costs.

Abstract: An electric field resistor includes N coils. N coils encircle a common center in sequence, and each of the coils has a first terminal and a second terminal, wherein the first terminal of the first coil receives a first reference voltage, the second terminal of the Nth coil receives a second reference voltage. The second terminal of the ith coil is coupled to the first terminal of the (i+1)th coil, wherein N is a positive integer greater than 1 and 1?i<N. Besides, a distance between the ith coil and the (i+1)th coil is in direct proportion to a voltage difference between the first terminal and the second terminal of the (i+1)th coil.

Abstract: An electric field resistor includes N coils. N coils encircle a common center in sequence, and each of the coils has a first terminal and a second terminal, wherein the first terminal of the first coil receives a first reference voltage, the second terminal of the Nth coil receives a second reference voltage. The second terminal of the ith coil is coupled to the first terminal of the (i+1)th coil, wherein N is a positive integer greater than 1 and 1?i<N. Besides, a distance between the ith coil and the (i+1)th coil is in direct proportion to a voltage difference between the first terminal and the second terminal of the (i+1)th coil.

Abstract: Designs and methodologies related to attenuators having a thin-film resistor assembly are disclosed. In some embodiments, the thin-film assembly can include a first and second thin-film resistor, each having a main portion with an input end and an output end. The input end of the first thin-film resistor is interconnected to the input end of the second thin-film resistors, and the output end of the first thin-film resistor is interconnected to the output end of the second thin-film resistor. The first and second thin-film resistors are disposed relative to one another so as to define a separation. The separation region reduces the likelihood of hot spot regions forming at or near the center of the thin-film structure and improves power handling capability for a given resistor width. Also disclosed are examples of how the foregoing features can be implemented in different products and methods of fabrication.

Abstract: A heating system in the form of a multi-layer, yet relatively thin and flexible panel. The panel contains a number of layers including first, second and third electrically insulating layers. A first electrically conductive resistive layer (heater layer) is sandwiched between the first and second insulating layers. A second electrically conductive resistive layer (resistive neutral plane layer) is sandwiched between the second and third insulating layers. The heater layer has a neutral electrical connection and a live electrical connection. The neutral and live electrical connections are electrically connected to each other at the panel only by electrically resistive material of the heater layer extending between the neutral and live electrical connections. The resistive neutral plane layer has a neutral electrical connection electrically connected with the neutral connection of the heater layer.

Abstract: The warming article contains a heating element and a sensing system. The sensing system has a first sensor element being a temperature dependent variable resistor and a second sensor element having at least two resistors in series and corresponding jumpers for one or more resistors in the second sensor element. The first sensor element is linear and flexible and the second sensor element is used to adjust the total sensor resistance to a fixed value at a particular temperature.

Abstract: An adjustable resistor embedded in a multi-layered substrate and method for forming the same. The adjustable resistor comprises: a planar resistor, having a plurality of terminals; and a plurality of connecting lines connected to the planar resistor, each of the connecting lines being drawn from each of the terminals of the planar resistor so as to form a resistor network, wherein the connecting lines are selectively broken by a process for drilling the substrate to form a number of combinations of opened connecting lines such that the resistance value of the adjustable resistor is varied and thus the resistance value of the adjustable resistor can be precisely adjusted.

Abstract: A resistive circuit includes a first terminal and a second terminal and polycrystalline first and second resistive segments coupled between the first and second terminals. A third terminal A is coupled to the first resistive segment, and a third terminal B is coupled to the second resistive segment. The third terminal A has a first voltage with respect to the first terminal, and the third terminal B has a second voltage with respect to the second terminal. With this arrangement, the non-linearity of resistance of the first resistive segment at least partially compensates for non-linearity of resistance of the second resistive segment.

Abstract: A resistor circuit includes first to Mth resistor circuit units. A (2j?1)th resistor circuit unit includes a (2j?1)th first fuse element and a (2j?1)th resistor provided in series between a (2j?1)th node and a 2jth node, and a (2j?1)th second fuse element provided in parallel with the (2j?1)th first fuse element and the (2j?1)th resistor between the (2j?1)th node and the 2jth node. A 2jth resistor circuit unit includes a 2jth first fuse element and a 2jth resistor provided in series between the 2jth node and a (2j+1)th node, and a 2jth second fuse element that is provided in parallel with the 2jth first fuse element and the 2jth resistor between the 2jth node and the (2j+1)th node. The (2j?1)th first fuse element, the (2j?1)th second fuse element, the 2jth first fuse element, and the 2jth second fuse element are disposed in a fuse region. The (2j?1)th resistor is disposed in a first resistor region formed in a first direction with respect to the fuse region.

Abstract: The invention relates to a resistor network (2) such as a resistor ladder network, comprising at least a resistor body (4) which is provided with at least a column (6) of taps (8) situated between a first tap and a second tap, wherein, in use, at least two taps can be connected with respective first and second sources of reference input potentials, and wherein each tap of the at least one column of taps can be used for outputting an output potential via a contact area which is connected with the concerning tap, wherein the resistor body (4) comprises a multiple of resistor sub-bodies (5), wherein each resistor sub-body (5) is connected with a column (6) of taps (8), and wherein the only electrical connections between the resistor sub-bodies (5) are established by electrical connections via taps (8) connected with the resistor sub-bodies (5). Furthermore the invention relates to a method for manufacturing a resistor network (2) such as a resistor ladder network.

Abstract: Embodiments of a resistor are disclosed.

Abstract: A trimming circuit and an electronic circuit that decreases the resistance of an activated transistor while reducing the number of resistors. The trimming circuit includes a plurality of series-connected units. Units for respectively changing adjusting resistances of Runit/2, Runit/4, Runit/8, and Runit/16 are each formed by a transistor, a series-connected resistor circuit, which has resistance Rt and which is connected in series to the transistor, and a parallel-connected resistor circuit, which has resistance Rm and which is connected to the transistor and the series-connected resistor circuit. The resistances Rm and Rt are determined in each unit such that the difference between the resistance Rm when the transistor is off and the resistance of the entire unit when the transistor is on determines the adjusting resistance.

Abstract: A dry-type high-voltage load system apparatus has a space-saving structure, which is resistant to chain breaking, arc discharge and vibration, and a method of preventing the chain breaking and the arc discharge for use with the system apparatus. The system apparatus includes a dry-type high-voltage load system circuit including a low-voltage bank formed of lower-capacity configuration banks which include three-phase resistor circuits which are low-voltage resistor circuit. A high-voltage bank includes lower-capacity configuration banks for a high-voltage resistor circuit formed of three-phase resistor circuits. The three-phase resistor circuits are connected to a high-voltage power generator in parallel and are in the form of a Y-connection of three resistor arrays so that an isolated and independent neutral point is unconnected to other neutral points. The three phase resistor circuits may also be in the form of a ?-connection.

Abstract: A resistive circuit includes a first terminal and a second terminal and polycrystalline first and second resistive segments coupled between the first and second terminals. A third terminal A is coupled to the first resistive segment, and a third terminal B is coupled to the second resistive segment. The third terminal A has a first voltage with respect to the first terminal, and the third terminal B has a second voltage with respect to the second terminal. With this arrangement, the non-linearity of resistance of the first resistive segment at least partially compensates for non-linearity of resistance of the second resistive segment.

Abstract: The present invention includes a resistive module, the resistive module including a plurality of nodes and at least a resistive component. The plurality of nodes include an input terminal and an output terminal of the resistive module; the resistive component is electronically connected between the input terminal and the output terminal of the resistive module to thereby make the input terminal and the output terminal have a specified resistive value therebetween. In addition, the resistive component is electrically connected between two nodes of a node pair among the nodes, and each resistive component has a corresponding predetermined resistive value.

Abstract: A PTC device is provided which is capable of surely functioning as the PTC device even in a wiring through which a large current flows. A combined PTC device (10, 10?) is composed of two PTC devices each containing a lamellar PTC element (12, 12?) which is composed of a polymeric PTC material and a pair of electrodes (14, 16; and 14?, 16?) which are arranged apart from each other on one side of the PTC element. The electrodes (14, 16) of one PTC device are respectively opposite to the electrodes (14?, 16?) of the other PTC device, and terminals (20, 21) are arranged between the respective opposite electrodes. The respective opposite electrodes and the terminal between them are electrically connected with each other.

Abstract: A precision AC input voltage divider of input resistance RI and feedback resistance RF on a substrate is printed as a serpentine pattern for a thin line of resistive material. The input resistance is formed between a first and second terminal, and feedback resistance is formed between the second terminal and a third terminal. A first metallic conductor is formed on the substrate, connected to the first terminal, disposed to be adjacent to the input resistance, and having a distributed capacitive coupling to the input resistance that compensates for corresponding distributed stray capacitance from the input resistance to a circuit ground. A second metallic conductor is formed on the substrate, connected to the third terminal, disposed to be adjacent the feedback resistance, and having a distributed capacitive coupling to the feedback resistance that compensates for corresponding distributed stray capacitance from the feedback resistance to the circuit ground.

Abstract: An impedance network configuration in the form of a snake-like or ladder structure is provided. The ladder configuration enables the provision of tabs extending outwardly from the normal conducting path, the tabs providing a location for the provision of contact layers. Using such a configuration the contribution of the contact impedance can be minimized and also programming of the configuration may be effected.

Abstract: An arrangement of several resistors jointly positioned in one and the same well of a semiconductor device, as well as to a semiconductor device including at least one such arrangement of resistors, wherein the resistors, when viewed in a longitudinal direction of the resistors, are displaced in relation to one another.

Abstract: A printed circuit polymer thick film (PTF) resistor includes tolerance control material that substantially surrounds the resistor body and significantly improves the linearity of resistance vs. resistor length, and significantly reduces resistor-to-resistor and board-to-board fabrication variances. In one embodiment, the tolerance control material is the same metallic material as the printed circuit conductors, and is formed in two finger patterns on each side of the resistor body, each finger pattern connected to one terminal pad of the resistor. A layout cell is used for fabricating the PTF resistor. A method is used for fabricating the PTF resistor.

Abstract: A resistor string that may have two resistor matrices laid out back-to-back with selected or all nominally equipotential nodes of the two matrices being interconnected. In certain applications, the matrix may have switch connections at each node, with the second matrix being an inactive matrix that may have the same number or different number, typically fewer resistors than the first matrix. In another embodiment, separate matrices may be used, and the inactive matrix may be smaller and have fewer resistors of a lower value to minimize the effect of gradients across the substrate. Preferred matrices and node connection switch configurations, as well as various embodiments of these and other features of the invention are disclosed.

Abstract: Enhanced linearity, low switching perturbation resistor string matrices. The resistor strings are arranged in an array of a plurality of rows of resistive elements and electrically arranged with rows equally spaced above and below the physical centerline of the array being coupled together in an opposite sense. Preferably also physically adjacent rows are equally spaced from the center of the electrical order of rows. This connection prevents accumulation of errors due to vertical and horizontal resistance gradients over the array. Also node selection by controlling node select transistors coupled to column select lines to select one node in each row, and also controlling row select transistors to select the row of the desired node minimizes settling time after a tap change by inducing equal and opposite voltage changes at points close together along the resistor string, whether in the array of the present invention or in the snake configuration.

Abstract: An electric heating device includes a flexible resistor ribbon, a plurality of sections of electroconductive coating attached to the resistor ribbon at preset intervals, and connector contacts coupled to the resistor ribbon for enabling connection of a power source to the resistor ribbon. The resistor ribbon has a high specific impedance. The flexible resistor ribbon is attached to a rigid or flexible flat base panel for incorporation into a building as a floor, wall or ceiling panel. Layers of electric insulation are attached to the base so as to sandwich the flexible resistor ribbon. Where the resistor ribbon is bent back on itself, for example, to form a snaking configuration, a strip of two-sided adhesive tape is attached to the layers of electric insulation and to the ribbon at multiple spaced points.

Abstract: A multielement resistor may be assembled into a matrix from a plurality of resistor elements (12) of a U shape construction. The elements (12) are suspended from their upper portions by connecting brackets (16) which are supported by a supporting frame (14). Connecting brackets are preferably of electrically conducting material and insulated from supporting frame (14). Power input/output brackets (18) are provided.

Abstract: An electronic device includes two or more conductive polymer layers sandwiched between two external electrodes and one or more internal electrodes.

Abstract: A microcircuit resistor stack, which comprises of at least one set of equal value resistors connected in series providing a course trim, the at least one set of equal value resistors having at least two resistor; and at least one wirebond configuration, the at least one wirebond configuration being able to provide the fine resolution trim of the resistor stack.

Abstract: A regulating resistor network includes a plurality of resistors connected in parallel to each other. Each of these resistors is cuttable by being irradiated with light, and a resistance value of the regulating resistor network is adjustable by cutting at least one of the resistors off.

Abstract: A heater having selective power rating includes a source of electric current, at least one heating unit and at least one electric conductor having an input and an output. Each conductor is permanently fixed at its input and its output so that the conductor is in electric communication with the source. Each conductor is in one of two states. In a conducting state, the conductor is electrically continuous between its input and its output. In a nonconducting state, the conductor is severed between its input and its output. A first conductor is disposed with respect to the source and a first heating unit so that the first heating unit operates at a power level that is dependent on the state of the first conductor. The source and the at least one heating unit are configured to produce one of a plurality of a desired power levels depending on the state of the first conductor.

Abstract: The invention relates to an adjustable voltage divider arrangement produced by hybrid technology, having a first current-carrying ohmic resistance layer arranged between two printed conductors and a second resistance layer, which is electrically connected to the first resistance layer and to which there is connected a third printed conductor as a pick-off electrode. A cut is made in the second resistance layer for adjusting the voltage divider so that a desired level can be picked off at the pick-off electrode.

Abstract: A low capacitance chip varistor and a fabrication method thereof are described, which are capable of protecting the electronic elements of an electronic instrument from an external and internal surge and being well applicable to an electronic element which requires a low capacitance, and the low capacitance chip varistor includes at least one sheet support layer formed of a member having a low dielectric constant, a varistor layer including at least more than one varistor coating layer formed on the support layer, at least more than two internal electrode folded with a predetermined portion of the varistor layer to be connected with the varistor layer, one end of each of which is extended from a lateral surface of the support layer, and a pair of integrally formed external electrodes formed on a lateral surface of a varistor stack member integrally formed of the support layer, the varistor layer and the internal electrodes to be connected with one end portion of each internal electrode.

Abstract: A polymer high voltage current limiter comprising, per phase, a fast circuit-breaker pole, a semi-fast protection circuit-breaker pole, and a set of polymer-based elements having very low resistivity, filled with carbon black, and connected in series and in parallel, wherein each element comprises a carbon-filled polymer matrix of elongate shape and including in its interior two parallel metal conductors.

Abstract: A heating panel has a resistive heating layer formed on a substrate. Insulating layers can be formed on the substrate. The heating layer has electrodes on opposite edges connected to different phases of a multiphase power source. Capacitive currents caused in the substrate by the different phases cancel each other. Thus, leakage current is minimized through a conductor connected between the substrate and ground. The heating panel can be adapted for two phase or three phase systems. The heating panels are particularly useful for defining a heating cavity of an oven or pots on a cook top.

Abstract: A surface mounted thin film precision voltage divider is provided by incorporating two resistors on a single base of the same size and configuration as prior art surface mounted thin film precision resistors. Because the resistors were made at the same time, using the same materials and under the same conditions, the resistors react substantially equally to changes in temperature, aging, thermal shock, short time overload, high temperature exposure, resistance to bond exposure, moisture resistance, load life and low temperature operation. The voltage divider replaces two conventional surface mounted thin film precision resistors at a fraction of the cost.

Abstract: An integrated circuit resistor array suitable for use as resistors included in a high performance analog integrated circuit is provided. A plurality of resistor stripes are collectively arranged in a region on a substrate. The resistor stripes are made of the same material and designed to have the same cross-sectional area. The resistor stripes are electrically connected through first metal layer conductors. Second metal layer conductors connect the stripes to external circuits. Different resistors have matched voltage dependencies.

Abstract: A hair curling device is made up of one or more heating units which may be plugged into a handle and into each other to make up a heating surface of a selected length. A set of electrodes in the heating units are configured so that a voltage provided by the handle is impressed across a heating resistance within the heating units. Each additional heating unit, when plugged into the handle or a previously installed heating unit, changes the electrode configuration so that the heating current is routed into each new heating unit. A current limiting device is provided so that the temperature of the device is selectable. Heating units of various diameter are provided so that loose or tight curling is made possible by the simple expedient of snapping a different set of heating units into the handle.

Abstract: A termination device including a package having a first plurality of pins and a plurality of resistors disposed in the package is described. Each resistor has a pair of termini with one of the termini of each resistor connected to a corresponding one of the first plurality of pins and the other termini connected to a common conductor. The device also includes a reference conductor connected to a mid-portion of the common conductor and to a pin of the package. An alternate embodiment of the termination device includes two reference conductors connected to respective end portions of the common conductor and to pins of the package.

Abstract: An electroconductive material has at least one portion in which the electrical resistance varies continuously along a gradient. Accordingly, since the material is not formed by directly bonding different elements, it does not have a weak joint portion. Further, since other material characteristics besides electrical resistance also vary along a gradient, for instance, when the material is used at a high or low temperature, a large thermal stress does not generate at an interface between different elements of the material due to a difference of thermal expansion coefficients of such elements. A motor uses the above electroconductive material as a conductor provided in a plural slots. Consequently, starting characteristics of the motor are improved due to the skin effect, and internal stress of the motor due to the thermal expansion of the conductor is decreased. Moreover, the reliability of the motor is improved.

Abstract: An electronic circuit in which resistors R.sub.0 . . . R.sub.n+m are coupled in series with fusible cut-outs Q.sub.0 . . . Q.sub.n+m and in which at least one fusible cut-out Q.sub.n+1 . . . Q.sub.n+m is bridged by an additional resistor R.sub.n+1 ' . . . R.sub.n+m '. Each of the fusible cut-outs Q.sub.0 . . . Q.sub.n+m can be blown from a conductive to a non-conductive state. The total conductance Y.sub.total of the electronic circuit can thus be adjusted by targeted blowing of individual ones of the fusible cut-outs Q.sub.0 . . . Q.sub.n+m.

Abstract: An electronic component device includes an electronic component element 13 that is interposed between a pair of spring terminals 14 and 15. The electronic component element 13 is resiliently held by the spring terminals 14 and 15, and contact portions 17 and 18 of the spring terminals 14 and 15, which are respectively brought into contact with electrodes 13b and 13c of the electronic component element 13, are positioned on both major surfaces of the electronic component element 13 so as not to be opposed to each other. At least one groove of a set of grooves 16a to 16c is formed on at least one of the major surfaces of the electronic component element 13 for guiding the direction in which the electronic component element 13 is divided when the electronic component element 13 is destroyed by, for example, an abnormal voltage.

Abstract: A heating panel has a metal substrate, ceramic inner and outer insulating layers on the substrate. A film of resistive material forms a heating layer on one of the insulating layers. The heating layer has electrodes on opposite edges connected to different phases of a multiphase power source. Another electrode is connected to a neutral of the power source. Capacitive currents caused in the substrate by the different phases cancel each other. Thus, leakage current is minimized through a conductor connected between the substrate and ground. The heating panel can be adapted for two phase or three phase systems. The heating panels are particularly useful for defining a heating cavity of an oven.

Abstract: A trimmable resistor which is prepared with additional electrical contacts between the resistor and the substrate. These contacts are usually not connected electrically to the electronic circuit. Moreover, they do not extend across the entire width of the resistor. If the resistor is over trimmed, its resistance can be reduced by wire bonding a selected one of the additional electrical contacts to an end contact of the resistor. Multiple contacts may be placed along the substrate, both on the side of the resistor where trimming is to take place and on an opposite side.

Abstract: A fuse resistor protects a circuit from a surge, an overcurrent from an unexpected connection, or the like. When a continuous overvoltage higher than a predetermined value is applied to the circuit, the heat from a heat-generating resistant film fractures an insulating substrate of the fuse resistor to open the circuit. Changing the minimum current to which the fuse resistor responds, by modifying a cutout or notch on the substrate, makes it possible to use the fuse resistor anywhere in the circuit. A discharging-type surge absorbing element with a security mechanism that includes the fuse resistor can thus provide protection against a surge or a continuous overcurrent that is more than the rated value of the fuse resistor.

Abstract: A dynamic braking grid arrangement for reducing EMI generated by dynamic or partial regenerative electrical braking of an electric traction motor powered vehicle coupled to a wayside power source by a third rail or catenary. The grid arrangement comprises a high-power dissipation resistance grid having a plurality of separately defined resistance elements, each having a generally elongate configuration. Mounting means support each of the grid elements adjacent to and parallel with each other of the elements. A plurality of electrical conduction devices connect the elements into an electrical circuit such that current passes through at least one element in a first direction and through at least one adjacent element in a second opposite direction such that EMI generated by any one element is substantially cancelled by EMI generated by an adjacent element.

Abstract: A thermistor device includes plural thermistor elements in series, one or more of which is shunted with a varistor so that if such thermistor heats up and drops excessive voltage, the current therethrough is diverted to the varistor until other thermistors in series also heat to a high resistance state. The thermistor and varistor elements are thermally joined so that the various thermistor elements are rapidly brought up to temperature and prevent prolonged voltage drop across a protective varistor.

Abstract: A variable attenuator has a plurality of attenuation resistor units, a plurality of switching units, and a plurality of impedance compensation resistor units. The attenuation resistor units are connected in series for attenuating an input signal, and the switching units are provided for the attenuation resistor units. One of the switching units are selected in accordance with a digital control signal supplied from an external source. Each of the impedance compensation resistor units is connected in series with the respective switching units to compensate an output impedance to a specific value regardless of the state of the switching units. Therefore, the variable attenuator of the present invention can correctly control the level of an analog signal by a digital signal.

Abstract: A variable resistor is provided with a series resistor network including first, second and third resistor parts which are connected in series, where the second resistor part is connected to the first and third resistor parts via first and second nodes, respectively, and a fourth resistor part, coupled in parallel to the second resistor part via the first and second nodes. The fourth resistor part includes a plurality of resistors which are connected in series via a plurality of third nodes. The first resistor part has a terminal opposite the first node for receiving an input signal, and an output signal of the variable resistor is obtained via an arbitrary one of the third nodes of the fourth resistor part.

Abstract: An electrical circuit such as a Wheatstone bridge has a conductive strip extending between a current input terminal and a current output terminal and includes two resistors having a connecting part therebetween, a conductive segment extending between the connecting part and a measuring terminal, the connecting part being formed as a wider portion of the conductive strip in the direction of the conductive segment, the conductive segment having an adjusting portion between the connecting part and the measuring terminal.

Abstract: A resistor network is provided which significantly reduces the total number of resistors required to achieve a given resolution. It comprises a cell of resistors that consists of a nonbinary number of resistors that is not evenly divisible by an integer power of two and is specifically selected to permit the group of resistors to be sequentially reduced to subgroups, or combinations, of resistors which yield a plurality of subgroup resistances that differ from preceding or subsequent subgroup resistances by a generally equivalent differential. The cell of resistors is combined with a plurality of resistor cells that consist of binary numbers of resistors in a conventional resistor ladder format. When combined with the binary resistor cells, the cell consisting of a nonbinary number of resistors provides a substantially similar resolution with a significant reduction in the number of resistors required.

Abstract: An improved blower motor speed control resistor array in which the resistor elements are defined by multiple optimally sized patches of resistive ink deposited onto opposite sides of a thin flat ceramic substrate. The array comprises three resistive patches connected in series via fusing elements to provide three reduced blower motor speeds MH, M and L. The thin ceramic substrate is flat on both of its faces, and each face comprises a terminal region for attachment of the resistive patches to the terminal elements, and a resistor region for deposition of the three resistive patches. The resistive patch of lowest resistivity (the MH resistor) is deposited on the entire resistor region of a first side of the substrate. The resistor patches of intermediate and highest resistivity (the M and L resistors, respectively) share the resistor region of the other side of the substrate in relation proportion to their respective resistivities.