Abstract: An RC voltage divider includes a secondary part connected to a primary part. The secondary part has a coaxial build up, assembly, configuration or alignment.

Abstract: An apparatus and a method for simulating a mechanical stress applied to a sealant from a lightning strike upon an aircraft is provided. The apparatus comprises a specimen, a test fixture, and a capacitor. The specimen comprises an electrically non-conductive sealant for an aircraft fuel tank having a cylindrical shape, and an electrically conductive wire centered axially within the sealant. The test fixture secures the specimen during testing. The capacitor is electrically coupled to the test fixture, and simulates a lightning strike upon the aircraft by vaporizing the wire with a current to generate a mechanical shock to the sealant.

Abstract: An electric potential measuring apparatus includes a detecting unit, a generating unit, and a measuring unit. The detecting unit is provided on a surface of a measurement subject and detects a second signal including a first signal within a first frequency range from the measurement subject. The generating unit generates a fourth signal by averaging a third signal within a second frequency range outside the first frequency range. The measuring unit measures electric potential of the first signal included in the second signal detected by the detecting unit with reference to electric potential of the fourth signal generated by the generating unit.

Abstract: Disclosed herein is a position indicator that includes: an enclosure forming a hollow and rod-shaped tubular body; a substrate disposed in the hollow portion of the enclosure and having a circuit configured to process signals exchanged with a position detection sensor; and a film-shaped capacitor having first and second conductor layers. The first conductor layer is formed on one side of a sheet-shaped dielectric, and the second conductor layer is formed on another side of the sheet-shaped dielectric and is opposed to the first conductor layer with the sheet-shaped dielectric provided therebetween. The film-shaped capacitor is fastened to the substrate in such a manner as to make up part of said circuit, and the size of an area over which the first and second conductor layers of the film-shaped capacitor are opposed is changeable by changing the size of the film-shaped capacitor to specify a constant for said circuit.

Abstract: A transmitting and receiving electrode system, and power transmission method using the same are provided. The transmitting and receiving electrode system includes: a voltage/current detection unit measuring a voltage and a current in real time while power is being transmitted between first and second electrodes; a controller calculating a variable element value based on the voltage and current values transferred from the voltage/current detection unit; and a variable element unit converting a variable element under the control of the controller to adjust an impedance of a power source.

Abstract: A system and method for detecting input phase loss in an adjustable speed drive (ASD) includes an input unit to detect operating data from the ASD. The operating data includes a DC link current of the ASD. The system also includes a state observer that is adapted to receive the operating data from the input unit and extract a DC link capacitor current of the ASD using the DC link current. The system also includes a controller programmed to compare the extracted DC link capacitor current to a predetermined fault range and generate a fault indication of an input phase loss if the extracted DC link capacitor current is within the predefined fault range. The controller is also programmed to calculate an estimated lifespan of the DC link capacitor based on the extracted DC link capacitor current.

Abstract: An electric circuit connected to a thermal switch with three terminals and a method for connecting the switch are realized. In an electric circuit 40 of a common power supply, an external connection wire 27 (first terminal 8) of a thermal switch 10 arranged close to a current limiting resistor 39 is connected to a load side (rectifier circuit 35), the current limiting resistor 39 is connected between the external connection wire 27 (first terminal 8) and an external connection wire 28 (second terminal 21), and an external connection wire 29 (third terminal 22) is connected to the output side of a power supply switch 32. Thus, the current limiting resistor 39 is connected and arranged to an internal resistor unit 18 of the thermal switch 10 in series and to a switch unit 38 (contact) in parallel.

Abstract: A voltage generation circuit includes: a resistor circuit which includes a plurality of resistors connected to each other in series or in parallel; a plurality of input ports which are connected in parallel to the resistor circuit and to which a control signal for controlling a potential state of the input port to one of a high state, a low state, and an open state is input; and an output port which is connected to the resistor circuit and outputs voltage signals with voltage values corresponding to combinations of the potential states of the plurality of input ports.

Abstract: The present invention provides a reference voltage circuit making use of a non-volatile and non-modifiable storage of an electric charge. A tunable transformation module is adapted to transform a constant voltage corresponding to the constant stored charge into an output reference voltage. Further, a control loop provides tuning of the transformation module by means of an external calibration module with respect to a high precision reference voltage source. During a calibration procedure the transformation module is tuned in such a way that the output reference voltage equals the high precision reference voltage. After disconnecting reference voltage electronic circuit and calibration module, the output reference voltage is governed by the charge stored by means of the non-volatile storage and by the configuration of the tunable transformation module. It remains constant and accurate with respect to time and temperature and consumes only a minimum of electric current.

Abstract: A system and method for improving the efficiency of an electrical circuit includes an electrical circuit including a first capacitor having a first and second terminal, and a second capacitor having a first and second terminal. A first resistor is connected to the first terminal of the first capacitor and a first terminal of the second capacitor. A second resistor is connected to a second terminal of the first capacitor and the second terminal of the second capacitor. A rheostat is connected to the first terminal of the first capacitor. A Zener diode is connected to the rheostat and the second terminal of the second capacitor. In some implementations, a power source is connected across at least one of the first terminal of the first capacitor and the first terminal of the second capacitor and the second terminal of the first capacitor and the second terminal of the second capacitor.

Abstract: A power supply circuit includes a first resistor and a first capacitor. One end of the first resistor is connected to a system power. The other end of the first resistor is connected to the anode of the first capacitor. The cathode of the first capacitor is connected to a digital analog converter A (DACA) VDD pin of a north bridge on a motherboard. The system power provides a stable power signal for the DACA VDD of the north bridge via the first resistor and the first capacitor. Thereby the display no longer ripples when the resolution of the display is adjusted to a certain value.

Abstract: A switching power supply includes an energy-storing device, a power switch, a driving circuit and a thermal sensing device. The energy-storing device is coupled to an input power source and controlled by the power switch to increase or decrease the power therein. The power switch has a control terminal connected to the driving circuit for switching. The thermal sensing device is connected to the control terminal of the power switch and powered by the driving circuit. When sensing an operation temperature exceeding a predetermined range, the thermal sensing device disables the driving circuit.

Abstract: A constant-voltage circuit in which a response speed for a sudden change of an input voltage or a sudden change of a load current can be fast are disclosed. In normal operating conditions, a first control circuit (error amplifier circuit) having an excellent direct-current characteristic controls operations of an output voltage control transistor and an output voltage is made a constant voltage. When the output voltage is suddenly decreased, before the first control circuit controls the operations of the output voltage control transistor by responding to the sudden decrease of the output voltage, an amplifier circuit having a high-speed response characteristic amplifies the change of the output voltage, and when the amplified voltage obtained by the amplification is suddenly decreased, a second control circuit controls the operations of the output voltage control transistor for a predetermined period. With this, the output voltage can be a constant voltage.

Abstract: A high-voltage device having a measuring resistor, also called a bleeder, is plunged into an electrical field whose voltage varies in the same way as the voltage along the bleeder. To achieve this, the capacitive elements are distributed in two rows, each row defining a plane. Along each row, the potentials are growing. The space between the two rows is sufficient for the bleeder to be placed therein. The bleeder is formed either by series-connected resistors or by a screen-printed resistor.

Abstract: Provided is a digitally-controlled linear regulator having noise-shaped component selection. The digitally-controlled linear regulator has a regulated-voltage sensor, a comparator module, a quantization module, and an impedance switching network. The regulated-voltage sensor is operably coupled to sense an output voltage of the digitally-controlled linear regulator to produce a sensed output voltage. The comparator module is operably coupled to compare the sensed output voltage with a reference voltage at a predetermined clock rate to produce a digital regulation signal. The quantization module is operably coupled to quantize the digital regulation signal to produce a quantized regulation signal. The impedance switching network is operably coupled to convert a source voltage into the output voltage of the digitally-controlled linear regulator based on the quantized regulation signal.

Abstract: The invention relates to a fast-working residual display suppression circuit for LCD and a method thereto. The method includes the following steps: receiving a control signal; if the control signal is an automatic control signal, comparing a first reference voltage with a fixed difference to a supply voltage to a second reference voltage according to an externally input start signal; as the first reference voltage≦the second reference voltage, outputting an activating signal to an LCD power controller and a fast discharge circuit; if the control signal is a manual control signal, directly outputting the activating signal in order to drive the LCD power controller and the fast discharge circuit and cutting off the power supply to the fast discharge circuit by the LCD power controller according to the activating signal and combining two discharge paths of the fast discharge circuit to produce an optimal discharge path to speed up the discharge rate.

Abstract: A circuit regulates the flow of current to a bank of light emitting diodes (LEDs). The circuit is sensitive to ambient temperature and increases the voltage at the LEDs in the circuit. Consequently, the current flow to the LEDs will increase when the ambient temperature increases and the LEDs would, with a fixed current, begin to lose brightness. Consequently, the circuit allows LEDs to be used as lighting in applications, such as vehicle turn or brake signals, that experience wide ambient temperature variation but require that the LEDs remain sufficiently bright despite the temperature increases.

Abstract: The invention relates to an arrangement of two cascaded transformers, i.e. an impedance transformer (24) and a balance-unbalance transformer, also referred to as balun transformer (26). A relatively simple, inexpensive, small and efficient construction of this arrangement is achieved by mounting both transformers (24, 26) on a single core (50) of a magnetic material. The arrangement according to the invention can be used in CATV networks, more specifically in CATV modules and optical receivers for use in such CATV networks.

Abstract: A system for an eight-phase 45° polyphase filter with amplitude matching, where a full eight-phase 45° split may be achieved by tying together the inputs of two offset four-phase 90° phase splitters. Amplitude matching may be achieved by obtaining those inputs from an additional single four-phase 90° phase splitter. The additional phase splitter can distribute power evenly among the inputs of the two offset phase splitters so as to cancel out the occurrence of any uneven power distribution.

Abstract: There is provided an electronic inductance circuit having a transistor, a first resistor, a second resistor, a capacitor and a first current source. The main current path of the transistor and the first resistor are connected in series to form a first serial circuit between an input terminal and an output terminal. The second resistor and the capacitor are connected in series to form a second serial circuit between the input and output terminals, thus forming a parallel circuit of the first and second serial circuits. The connection point between the second resistor and the capacitor is coupled to the control terminal of the transistor. The connection point is connected to the first current source for determining the operating point of the transistor.

Abstract: A circuit arrangement for limiting the current at make which includes hot-carrier thermistors that see to a reduction of the current flow at make. Only when a further hot-carrier thermistor has been adequately heated by the flow of current are the hot-carrier thermistors bridged, and the capacitative load receives the full operating voltage. After turn-off, an ambient temperature-compensated voltage divider at the base of a transistor prevents the immediate re-activation until the further hot-carrier thermistor and, thus, all hot-carrier thermistors, have adequately cooled.

Abstract: A circuit for generating an output voltage which is used during active time periods and not during inactive time periods. A DC/DC converter converts an input voltage to the output voltage. During the inactive time periods, a capacitor is charged with a quantity of charge which is then used to generate the output voltage during the active time periods. The quantity of charge is generated by a current from a current generator. The current is lead to the ground via the capacitor and a diode. As the capacitor is charged more and more, the current diminishes to zero. A control voltage switches the circuit during the active time periods so that the output voltage is obtained. The circuit can be used in a radio transmitter for portable radio equipment, in which the radio equipment is used in a radio system where transmissions occur in bursts.

Abstract: A circuit for weighted addition which includes a transistor having a gate and a plurality of resistance elements. Each resistance element has a first and second end. The first end of each resistance element is impressed with a voltage, and the second end of each resistance element is connected to the gate of the transistor. The circuit is small in size and renders precise and various types of weighted addition possible.

Abstract: A high speed probe attenuator has an attenuator with a plurality of resistors connected in series between a probe input and an instrument output. A plurality of capacitors are coupled in parallel with pairs of the resistors in an interleaved fashion to spread the frequency correction along the attenuator. The output of the attenuator is coupled by a large diameter coaxial cable to a test instrument. The result is a high speed probe with no dribble-up effect and no overshoot.

Abstract: The high voltage regulator employs a field effect transistor (FET) amplifier and a shielded wide band frequency compensated RC voltage divider. The device comprises a FET amplifier used as a current source in a 20 KV power supply. The negative output of the supply is sensed by the voltage divider consisting of two resistors in parallel with two capacitors for frequency compensation. The voltage divider output is applied to the non-inverting input of an operational amplifier whose reference is set to affect the linear operation of an inverting operational amplifier. In the voltage divider, a variable high voltage quartz glass piston capacitor is used to set the RC product of the high level arm equal to that of the low level arm.

Abstract: A power supply for an X-ray tube having a feedback loop for regulating the high-voltage output signal of the power supply and allowing operation from AC lines of different voltage characteristics. The single-phase components of the input AC line voltage pass through separate silicon controlled rectifiers before being applied to a step-up transformer. The high-voltage transformer output is monitored by a shielded resistor divider and processed to produce a low-voltage control signal for controlling the input rectifiers.

Abstract: There is disclosed a phase-controlled switching circuit, comprising a controlled rectifier (e.g. bidirectional triode thyristor); an amplifier connected at its output terminal to the gate of the controlled rectifier; an ac Wheatstone bridge having at one of its arms a variable resistance (e.g. thermistor to CdS photoconductive cell), said ac Wheatstone bridge being connected at one branch to the input terminal of the amplifier and at its other branch between the cathode and anode of the controlled rectifier through a load; a time constant circuit connected with the variable resistance; a pair of mechanical contacts (e.g. relay) connected in parallel with the controlled rectifier and a dc source for electrifying the whole circuit.

Abstract: This invention relates to a method for adjusting an electronic circuit used for a television receiver and the like when it is adjusted upon being manufactured, in which connection wires (17) and (18), which can be melt-cut by flowing a current thereto from the outside, are previously connected in series or in parallel to adjusting elements (12) and (13) inserted into a predetermined current path within an electronic circuit (10); the operation state of the electronic circuit (10) is detected by a detector circuit (5); on the basis of the detected result, it is judged whether the connection wires (17) and (18) are melt-cut or not; and under the necessary state, the connection wires (17) and (18) are melt-cut by flowing the current thereto from the outside, whereby a semi-fixed resistor is omitted, the reliability thereof after adjustment can be improved and the adjustment itself can be simplified, thus reducing the adjusting time.

Abstract: A switched resistor regulator controls current flow through a resistor electrically connected to a load by varying the duty cycle of switching the resistor into electrical connection between of a power source and the load to regulate the power to the load. Both current and voltage regulation can be achieved. In a series switched configuration, current flow through a resistor in series with the load is controlled with current flow being maintained by a capacitor is parallel with the load when the resistor is switched off. In a shunt switched configuration current flow through a resistor in parallel with the load is controlled, with a capacitor parallel to the load also being used. In a hybrid configuration a shunt switched resistor is used while the current level to the load is changed by selecting one of several series resistors; a capacitor is also provided parallel to the load.

Abstract: A symmertical polyphase network consists of a ring of series-connected alternate resistors and capacitors, with junction points therebetween alternately forming inputs and outputs of the network. For example there are four resistors and four capacitors. The resistors are trimmed so that the product of the resistance and the capacitance of the components connected to each respective output is equal to a product RC, R and C being the nominal resistance and capacitance of the resistors and capacitors.

Abstract: The present invention relates to a phase-regulated zero-crossover ac switching circuit. The present switching circuit comprises the components of (a) regulator having a time constant; (b) ac Wheatstone bridge connected with the regulator and amplifier, which bears in one arm a variable resistance; (c) amplifier for an unbalanced voltage generated in the Wheatstone bridge; (d) means for supplying dc energy to the regulator and amplifier; and (e) thyristor driven by the amplifier, wherein said components are connected in a manner such that said thyristor is not conducted at the moment when an ac power supply is coupled, and that the current through thyristor starts from a zero-crossover of ac sine wave and successively increases to the prescribed level within a period determined by the time constant of the regulator.

Abstract: A supply-voltage discrimination device for adapting a load (8) to a lower or higher alternating-voltage range includes a voltage-dependent resistor (1) thermally coupled to a PTC-resistor (2) and electrically connected in series with said voltage-dependent resistor. The resistors are chosen so that initially the dissipation is mainly determined by the voltage-dependent resistor.

Abstract: A DC-to-DC voltage converter is disclosed for converting the voltage from a battery to provide a power supply voltage whose value can be equal to the battery voltage multiplied by or divided by a non-integral factor, e.g. 2/3. The converter operates on the principle of capacitor charge switching, and high conversion efficiency is achieved in operation at very low levels of supply current, such as are utilized in an electronic timepiece.

Abstract: This circuit comprises at least one power supply inserted between the earth and each of the two wires of the connection, two RC series dipoles in each case inserted between the earth and the two wires and a circuit able to fix to the earth the average potential of these wires.Application to telephony and the supply of sensors.

Abstract: A laminated structure comprises a plurality of double-layer capacitor unit cells, each having a high withstand voltage. A complete capacitor is made by laminating a plurality of unit cells of the double-layer capacitors type and by connecting a plurality of resistors, having substantially equal resistances, in parallel with the respective unit cells. In a preferred embodiment, a high-precision integrated voltage-equalizing resistor is prepared by laying linear resistors on a flexible sheet which is then wrapped around the laminated unit cells.