395 results about "Resistive circuits" patented technology

An LED assembly has an AC voltage applied from a fluorescent lamp fixture via one or more power supply connectors belonging to a base which can be attached to the fluorescent lamp fixture, and the LED assembly includes a resistive circuit having impedance equivalent to that of a filament of a fluorescent lamp which can be attached to the fluorescent lamp fixture, a rectifier circuit for rectifying an AC voltage supplied via the resistive circuit, and a load circuit to be operated in response to a supply of a voltage rectified by the rectifier circuit.

A wireless communication device includes a resistive-element-including RFIC and an antenna coil. The resistive-element-including RFIC includes an RFIC, a capacitive element, and resistive elements. The resistive elements and a portion of a circuit in the RFIC define a variable impedance circuit. The RFIC controls the impedance of a resistive circuit added to an antenna circuit in accordance with certain IO terminals set as output ports or input ports, thus obtaining a Q value of the antenna circuit in accordance with a communication speed.

The invention discloses an auto meter visual detecting system based on a computer, comprising a light source, a detecting box body, a camera connected with a PC control system, and an analog signal generator connected with the PC control system, wherein the analog signal generator comprises a frequency circuit and a resistance circuit and is used for receiving commands sent by the PC control system so as to generate frequency and a resistance signal needed by meter detection; the PC control system comprises an input module, a position adjusting module, a meter dial plate identification module,a communication setting module, a camera target capturing module and an output module which are respectively connected with a PC. The position adjusting module promotes two stepping motors in a camera position adjusting mechanism to run by sending serial port commands; and the communication setting module is used for realizing Ethernet communication setting and serial port communication setting.The camera comprises an image displaying module and an image processing module. The invention also discloses a detecting method of the detecting system.

A bias generation method or apparatus defined by any one or any practical combination of numerous features that contribute to low noise and / or high efficiency biasing, including: having a charge pump control clock output with a waveform having limited harmonic content or distortion compared to a sine wave; having a ring oscillator to generating a charge pump clock that includes inverters current limited by cascode devices and achieves substantially rail-to-rail output amplitude; having a differential ring oscillator with optional startup and / or phase locking features to produce two phase outputs suitably matched and in adequate phase opposition; having a ring oscillator of less than five stages generating a charge pump clock; capacitively coupling the clock output(s) to some or all of the charge transfer capacitor switches; biasing an FET, which is capacitively coupled to a drive signal, to a bias voltage via an “active bias resistor” circuit that conducts between output terminals only during portions of a waveform appearing between the terminals, and / or wherein the bias voltage is generated by switching a small capacitance at cycles of said waveform. A charge pump for the bias generation may include a regulating feed back loop including an OTA that is also suitable for other uses, the OTA having a ratio-control input that controls a current mirror ratio in a differential amplifier over a continuous range, and optionally has differential outputs including an inverting output produced by a second differential amplifier that optionally includes a variable ratio current mirror controlled by the same ratio-control input. The ratio-control input may therefore control a common mode voltage of the differential outputs of the OTA. A control loop around the OTA may be configured to control the ratio of one or more variable ratio current mirrors, which may particularly control the output common mode voltage, and may control it such that the inverting output level tracks the non-inverting output level to cause the amplifier to function as a high-gain integrator.

System includes a sensor operably coupled to a device body. The sensor includes a sensing region and at least one resonant inductor-capacitor-resistor (LCR) circuit. The sensing region is configured to be placed in operational contact with an industrial fluid. The at least one resonant LCR circuit is configured to generate an electrical stimulus that is applied to the industrial fluid via electrodes at the sensing region. The device body includes one or more processors configured to receive an electrical signal from the sensor that is representative of a resonant impedance spectral response of the sensing region in operational contact with the industrial fluid responsive to the electrical stimulus. The one or more processors are further configured to analyze the resonant impedance spectral response and determine both a water concentration in the industrial fluid and an aging level of the industrial fluid based on the resonant impedance spectral response.

A comparator circuit of a temperature sensor includes an output node and a variable current node. The output node is a first voltage at a given temperature when a current at the variable current node is less than a threshold current, and a different second voltage at the given temperature when the current at the variable current node is more than the threshold current. A variable resistance circuit includes at least n resistors of different resistive values connected in series between the variable current node of the comparator and a supply voltage, where n is an integer of 4 or more. A switching circuit is provided to selectively bypasses individual ones of the n resistors during a test sequence to determine a trip temperature of the sensor.

The present invention is directed to systems for evaluating one-time programmable memory cells. A threshold current is applied to a resistive circuit, thereby generating a threshold voltage. A read current is applied to a first memory cell, thereby generating a memory cell voltage. The memory cell voltage is compared to the threshold voltage, thereby determining the state of the memory cell. In a further embodiment of the invention, a second threshold voltage is generated and compared the memory cell voltage, thereby verifying the state of the memory cell. The threshold current is optionally a substantial replica of said read current. The threshold current is optionally a proportional substantial replica of said read current. In an embodiment, the resistive circuit includes a second memory cell, which can be programmed or unprogrammed. The second memory cell is optionally arranged to average the memory cell resistance.

In one example embodiment involving a high-speed parallel-data communication from a first module to a second module, a termination circuit is adapted to reduce power consumption at the second module. The termination circuit includes resistive circuits respectively coupled to a plurality of parallel data-carrying lines that form the data bus. The other ends of the resistive circuits are interconnected to provide a reference voltage using the data on the parallel data-carrying lines. Consistent with one embodiment of the present invention, the communication approach uses data sets encoded so that each data set includes the same number of ones and zeroes; in this manner the reference voltage is always at midpoint and useful in providing termination to the data-carrying lines at all times.

The present invention is directed to systems for evaluating one-time programmable memory cells. A threshold current is applied to a resistive circuit, thereby generating a threshold voltage. A read current is applied to a first memory cell, thereby generating a memory cell voltage. The memory cell voltage is compared to the threshold voltage, thereby determining the state of the memory cell. In a further embodiment of the invention, a second threshold voltage is generated and compared the memory cell voltage, thereby verifying the state of the memory cell. The threshold current is optionally a substantial replica of said read current. The threshold current is optionally a proportional substantial replica of said read current. In an embodiment, the resistive circuit includes a second memory cell, which can be programmed or unprogrammed. The second memory cell is optionally arranged to average the memory cell resistance.

Disclosed is an output buffer circuit including a first differential transistor pair for differentially receiving a data signal from a differential input pair; and a second differential transistor pair for differentially receiving an emphasis data signal from another differential input pair; a pair of output resistor circuits via which the drains of first and second differential transistor pairs are connected to a power supply, said output resistor circuits each including a transistor; and a logic circuit adapted for receiving the data signal and the emphasis signal and for supplying a control signal which is of first and second values at the time of preemphasis and at other times to the transistors of the output resistor circuit, wherein the output resistance is relatively made larger at the time of emphasis, while being relatively smaller at the time of deemphasis.

A hot runner nozzle heater is provided that includes a sleeve defining a slot extending along a length of the sleeve. A first dielectric layer is disposed over an outer surface of the sleeve, and a resistive element layer is disposed over the first dielectric layer, wherein the resistive element layer defines a resistive circuit pattern that is preferably formed by a laser trimming process. A pair of terminal leads are secured to a portion of the resistive element layer thus defining a termination area, and the termination area is positioned proximate the slot and away from the proximal end and the distal end of the sleeve. A second dielectric layer is disposed over the resistive element layer but not over the termination area, a third dielectric layer is disposed over the termination area, and a protective layer disposed over the second dielectric layer and the third dielectric layer.

A voltage divider circuit generating a divided voltage by dividing an input voltage with a predetermined voltage division ratio, and outputting the divided voltage is disclosed. The voltage divider circuit includes a first resistor circuit including multiple resistors connected in series, the resistors being connected in parallel to corresponding fuses; and a second resistor circuit including multiple resistors connected in series, the resistors being connected in parallel to corresponding fuses, the second resistor circuit being connected in series to the first resistor circuit. The divided voltage is output from the connection of the first resistor circuit and the second resistor circuit, and the fuses of the first resistor circuit and the second resistor circuit are subjected to trimming so that the combined resistance of the first resistor circuit and the second resistor circuit is constant.

A motor driving apparatus includes a neutral point difference voltage detecting unit operable to detect a difference voltage between a virtual neutral point of a resistor circuit connected in parallel to motor coils and an actual neutral point which is a common connection point of the motor coils, a rotor position detecting unit operable to detect a position of the rotor based on the difference voltage, and a controller operable to control commutation of an inverter. A rotation start torque applying process applies a rotation start pulse for providing rotation torque to the rotor based on a determined rotor position.

Methods and apparatus are provided for programmable active inductance. The disclosed active inductor devices provide a tunable bandwidth with improved linearity. The disclosed active inductors have a variable frequency response corresponding to a variable inductance of the active inductor. The active inductor comprises a variable resistive circuit having an effective resistance, wherein the variable resistive circuit is comprised of at least one resistor that can be selectively bypassed in the variable resistive circuit to vary the effective resistive. The active inductor has an inductance that can be varied by varying the effective resistance.

A motor driving apparatus includes a virtual difference voltage detecting unit operable to detect a difference voltage between a virtual neutral point of a resistor circuit connected in parallel to motor coils and a terminal of a motor coil in non-conduction state, a rotor position detecting unit operable to detect a position of the rotor based on the difference voltage, and a controller operable to control commutation of an inverter based on the rotor position. The motor driving apparatus has a searching start mode for detecting the rotor position and energizes the coils, and a back electromotive voltage feedback mode for controlling commutation based on the back electromotive voltage. In the searching start mode, a rotor position searching process and a rotation start torque applying process are alternately performed.

The controller for solar energy lamp is composed of solar battery array, first set detection resistance circuit (DRC), overcharging protection circuit (OPC), DC-DC transfer circuit, second set DRC, accumulator, overdischarging and short circuit protection circuit (OSPC), and load connected in sequence. The input of first route of voltage and current detection circuit (VCDC) is connected to first set DRC, and the output is connected to signal chip system (SCS). The input of second route of VCDC is connected to second set DRC, and the output is connected to SCS. Through outputting PWM wave, SCS controls DC-DC transfer circuit. Through outputted control signals, SCS controls OPC, and controls OSPC. SCS is also connected to serial port comm. module, push button keys, and LCD module. The invention realizes functions: solar panel tracking according to maximum power, raising work efficiency of light-volt system, lowering cost, and remote controlling and networked management etc.

The invention discloses a grey level voltage generating circuit capable of stably providing a grey level voltage according to various gamma characteristics with low cost and power consumption. The invention comprises: an input side resistance circuit of number one to number J voltage division nodes consisting of fixed number (J+1) of resistor elements arranged in series connection between a first power line and a second power line for dividing the voltage between the two power lines; number one to number J voltage follower circuits which input the voltage of each input voltage division node; an output side resistance circuit which is arranged between the two power lines and comprises number one to number J output voltage division nodes driven by the voltage follower circuits and dividing the voltage between the two ends; and a grey level voltage selection circuit which outputs the voltages of L resistance division nodes in K resistance division nodes capable of dividing the voltage between the two ends of the output side resistance circuit as grey level voltages. The voltage of number i output voltage division node is equal to the voltage of number i input voltage division node; J is less than K,J is less than L which is less than K,and 1 is less than or equal to I which is less than or equal to J,wherein J is a positive integer, and L and i are integers.

A layered heater is provided that includes at least one resistive layer having a resistive circuit pattern, the resistive circuit pattern defining a length, a width, and a thickness, wherein the thickness varies along the length of the resistive circuit pattern and / or the width of the resistive circuit pattern for a variable watt density. The present disclosure also provides layered heaters having a resistive circuit pattern with a variable thickness along with a variable width and / or spacing of the resistive circuit pattern in order to produce a variable watt density.

A device for switching a semiconductor-based switch includes a terminal that is configured to be connected to a control terminal of the semiconductor-based switch. A controllable activation voltage source is configured to provide a time-varying activation voltage potential. A controllable resistive circuit includes at least two ohmic resistances connected in parallel that are controllable such that at least three resistance values of the parallel connection result. A control device is configured to control the controllable activation voltage source and the controllable resistive circuit independently of one another. The controllable activation voltage source and the controllable resistive circuit are connected to a series connection connected to the terminal. The control device is configured to control the controllable activation voltage source and the controllable resistive circuit in a time-varying manner to obtain time-varying resistance values of the controllable resistive circuit and the time-varying activation voltage potential of the controllable activation voltage source.

An output stage circuit is configured for enabling an output of an amplifier circuit to be pulled upwards and / or downwards to or beyond an upper power supply or below a lower power supply. The exemplary output stage circuit comprises a pair of output transistors configured to provide an output voltage, and a controlled resistive circuit. The controlled resistive element is configured to enhance the gain of the output stage circuit by modifying the dynamic impedance effect of the upper output transistor during pull-up operation, or the lower output transistor during pull-down operation. During normal operation, the controlled resistive element operates with low resistance, e.g., acts as a “short,” but during the pull-up or pull-down operation the controlled resistive element can be configured to add resistance to modify the dynamic impedance of the upper or lower output transistor. As a result, an amplifier circuit including an exemplary output stage circuit can swing towards or beyond an upper and / or lower power supply with minimal gain loss for the amplifier circuit, thus allowing for low voltage processes to be utilized.

A voltage controlled oscillator comprises a parallel resonance circuit including an inductor circuit, a variable capacitance circuit, and a high-frequency switch circuit, a negative resistance circuit and a frequency control section, and a frequency tuning sensitivity control section. The frequency control section shifts a band of an oscillation frequency by controlling ON / OFF of a switching element included in the high-frequency switch circuit. The frequency tuning sensitivity control section adjusts a change rate of a total capacitance of the variable capacitance circuit with respect to a control voltage, depending on a band to be used. The frequency tuning sensitivity control section is connected to a virtual ground point of a differential signal.

A slicer circuit is disclosed. The slicer circuit has the feature that a counting-circuit is employed to count the number of continuous times of signals in a same level continuous outputted from the comparator thereof, and when the number of continuous times reaches a preset value, a control signal is output to make a resistance circuit consisting of dynamic devices open, so as to largely delay the up-shift or down-shift speed of an input DC reference level and enable the slicer circuit to continue to judge the input signal correctly according to the input DC reference level.

A semiconductor package includes a wiring board having a plurality of first electrode pads exposed on a top surface thereof, and a plurality of second electrode pads exposed on a bottom surface thereof, and the first electrode pads are electrically connected to the respective second electrode pads. A semiconductor device is mounted on the top surface of the wiring board, and includes an endless ring-shaped resistance circuit formed in an interior of the device along a periphery thereof, and a plurality of third electrode pads provided inside the resistance circuit and electrically connected to the resistance circuit. The third electrode pads are electrically connected to the first electrode pads, respectively. A sealing resin layer is formed over the first surface of the wiring board so that the device and the first electrode pads are sealed and protected by the sealing resin layer.

The invention relates to an autoleveling system with cotton sliver weight control and a weight control method thereof. The autoleveling system comprises a cotton-feeding roller mechanism, a coiler, a cotton sliver bucket, an autoleveling device, a cotton layer thickness detection sensor and / or a cotton sliver thickness detection sensor, and a weight sensor for weighting a cotton sliver in the cotton sliver bucket, wherein the output end of the weight sensor is connected with the autoleveling device for controlling the output speed of the cotton-feeding roller mechanism; the weight sensor comprises a strain foil and a weight amplifier, and the strain foil is a bridge resistor circuit. The autoleveling system detects the weight of the cotton sliver after a certain length of cotton sliver is continuously produced, and the autoleveling device compares a detected weight with a standard weight stored in a program and controls the output speed of the cotton-feeding roller mechanism according to a comparison result. The invention realizes the online weight detection of an overlength section of cotton sliver, can effectively correct the weight deviation of the overlength section of cotton sliver in time, lightens the labor intensity of an operator and improves the detection precision.

The invention relates to an overlapped microbial fuel cell in-situ test system and an application thereof. The overlapped microbial fuel cell in-situ test system comprises a positive electrode chamber formed by at least one positive electrode reaction module in a series-wound overlapping manner, a negative electrode chamber formed by at least one negative electrode reaction module in a series-wound overlapping manner, a proton exchange membrane arranged between the positive electrode chamber and the negative electrode chamber, and a circumscribed nitration reactor communicated with the positive electrode chamber and the negative electrode chamber separately; the positive electrode chamber and the negative electrode chamber are arranged oppositely in the mode of an upper one and a lower one that can be exchanged mutually; and a circumscribed adjustable resistive circuit is further arranged between the positive electrode chamber and the negative electrode chamber. The system is used for in-situ test on the characteristic parameters of the electrode biological membrane under the same electrochemical state. Compared with the prior art, the overlapped microbial fuel cell in-situ test system is simple and compact in structure; the functions of decarbonization, nitration and denitrification are arranged in independent units; the pollutant removal efficiency is improved; the system can be changed easily according to the pollutant concentrations and actual water amount; and the overall system is high in sealing property, high in stability, stable in running, and wide in the development and application prospects.