Abstract: An integrated Marx generator circuit is constructed in one assembly from a housing with two oil-filled cavities. First and second capacitors each include two sets of spaced apart capacitor plates. The first and second capacitors are formed in the separate cavities. The space between the capacitor plates are filled with oil and insulating material. A set of four spark gap switches control the charging and discharging of the generator circuit.

Abstract: A transformerless power conversion system including a plurality of capacitors connected in series; a charging circuit connected to the plurality of capacitors, the charging circuit charging the plurality of capacitors from a voltage source to a predetermined voltage; a circuit for inverting the polarity of the charge stored in selected capacitors of the plurality of capacitors, the polarity inverting circuit including a plurality of inductor circuits, each of which can be switchably coupled to a corresponding different one of the selected capacitors to form a resonant circuit which aids in inverting the polarity of a stored charge in that capacitor; and a discharging circuit for extracting power from the plurality of capacitors at a transformed voltage.

Abstract: The power supply, useful with an electromagnetic force apparatus such as a riveter or a bolt inserter, includes two capacitor banks which are charged through charging doubler modules. Each charging doubler module includes an AC capacitor which is responsive to a power source. The AC capacitor is connected to a node point between two diode elements, which are connected in series across the capacitor bank. An analog-to-digital converter converts the voltage on the capacitor bank to a digital voltage for comparison with a selected digital charge voltage in a controller. The selected digital charge voltage may vary over time by means of a compensating algorithm. A ground fault indicator using a biasing voltage is connected between a selected electrical circuit portion of the force apparatus and earth ground. A gas discharge tube in combination with a current sensing element is connected to the capacitor banks to determine a possible overvoltage condition.

Abstract: The device is a compact Marx-type generator capable of producing a high-vage burst of pulses having risetimes less than 10 nanoseconds at repetition rates up to 10 kHz. High-pressure hydrogen switches are used as the switching elements to achieve high rep-rate. A small coaxial design provides low inductance and a fast risetime. The device may be used as a high-rep-rate high-voltage trigger generator, or as a high-voltage pulse source capable of producing up to 1 MV pulses at high repetition rates.

Abstract: Charge pump circuitry is implemented using a voltage shifting technique to generate a symmetrical bipolar voltage. The symmetrical bipolar voltage charge pump power supply can be fabricated as an integrated circuit on a single substrate, and can be integrated with various interface circuits to provide symmetrical bipolar voltage thereto. The charge pump includes voltage shifting circuitry which generates an increased output voltage of a negative polarity and an increased output voltage of a positive polarity. The shifting circuitry is responsive to an internal oscillator which triggers charge accumulation and voltage shifting. Neither output voltage is generated from the other output voltage. Rather, the negative and positive supply voltages are each generated, in substantially the same manner, by charge transfer effected by the voltage shifting circuitry in response to triggering by the internal oscillator.

Abstract: A multiple staged charge pump network with staggered clock phases for pumping a first voltage to a second voltage with high current capability. The charge pump includes multiple serial charge pumps connected in parallel, multi-phase clocks, input voltage and output voltage connectors. The multiple serial charge pumps have in each series a plurality of diode-connected n-channel MOSFETs. The first n-channel MOSFET in each series is coupled to the input voltage connector, while the rest of the n-channel MOSFETs are coupled to a pumping capacitor at their diode-connected gates. The clocks are coupled to the multiple serial charge pumps for generating a plurality of phases of clocks with each phase of the clocks being applied to the alternating n-channel MOSFETs in a series such that adjoining n-channel MOSFETs are not driven by the same phase of clock. The input voltage connector is coupled to the first n-channel MOSFET in each series of the multiple serial charge pump for providing an input voltage.

Abstract: A circuit arrangement for generating a high DC voltage utilizes a voltage multiplier cascade which requires two alternating, non-overlapping pulse trains which are generated by a pulse generator. For given applications, for example, contactless chip cards, the supply voltage is derived from an ac voltage induced into a coil and rectified by means of a bridge rectifier. This gives rise to a voltage drop. When the pulse generator operates utilizing the supply voltage, the amplitude of the output pulses is lower, i.e. a further voltage drop occurs. Therefore, in order to overcome this limitation, the pulse generator does not derive the pulses for feeding the cascade from the rectified operating voltage, but directly from the ac voltage. This results in a higher amplitude and a better efficiency. Another feature includes the blocking of the pulse generator so that it does not represent a load to the ac voltage.

Abstract: Disclosed is a new Transformerless Power Conversion System (TPCS) that allows a direct voltage step-up or step-down of DC or AC power without the use of magnetic core transformers. The operation is accomplished with solid state switching devices, capacitors, preferentially air core inductors and a switch control system.The conversion and step-up from AC to DC and the inverse process can be implemented with high efficiency and without the generation of harmonics. The transformer elimination in conjunction with high inversion frequency operation results in a low weight system without transformer core losses and third harmonic generation. For high ratio DC to DC transformation the TPCS transports the input charge directly to the output without requiring an AC link. The three distinct operations of charging, transformation, and energy discharge are typically in sequential order and allows a complete isolation between the input and output power grids.

Abstract: The invention relates to a semiconductor switch, in particular as an ignition voltage switch for applying an ignition voltage to a spark plug of an internal combustion engine, having a cascade circuit formed of series-connected semiconductor components for connecting an operating voltage through to a load, wherein the semiconductor components each have a depletion-layer capacitance, and the connection existing between each two semiconductor components forms a parasitic ground capacitance determined by the electrical field distribution. For symmetrical voltage distribution without additional wiring elements, it is provided that a breakover current (i.sub.k) flowing through the semiconductor components (T.sub.1 -T.sub.n) prior to attainment of the conductive state is located, relative to a displacement current (i.sub.ver), within the range i.sub.ver <i.sub.k <a.multidot.i.sub.ver, wherein the displacement current (i.sub.ver) is brought about by a voltage increase (du.sub.o /dt) in the operating voltage u.

Abstract: A charge pump circuit for providing a bipolar voltage output at substantially double the unipolar voltage input source includes first and second voltage input terminals; a first and a second capacitor; a first switching device for selectively connecting first and second capacitors across the input terminals to charge each to the voltage of the input source; first and second voltage output terminals; a second switching device for selectively connecting the capacitors in series between one of the input terminals and one of the output terminals to generate a first polarity voltage which is substantially double the voltage of the input source; a third switching device for selectively connecting at least one of the capacitors in series between the other of the input terminals and the other of the output terminals to generate a second polarity voltage which is substantially double the voltage of the input source; and a clock for sequentially, selectively actuating the first, second and third switching devices.

Abstract: The present invention is an electrostatic transformer, and more particularly an electrostatic transformer capable of electrically insulating the input and output sides thereof without using any transformer. One A of input terminals A and B is connected to one end of a first capacitor C.sub.1 via a first switch S.sub.1 while the other B of the input terminals A and B is connected to the other end of the first capacitor C.sub.1 via a switch S.sub.4 ' opened and closed simultaneously with the opening and closing operations of the first switch S.sub.1 in interlock with same. The one and other terminals of the first capacitor C.sub.1 are connected to output terminals a and b, respectively, via a second switch S.sub.2 and a switch S.sub.2 ' closed and opened conversely to the opening and closing operations of the first switch S.sub.1 in interlock with same. The inventive electrostatic transformer has the above structure, so that if the first switches S.sub.1 and S.sub.

Abstract: A very high voltage amplifier in which plural cascaded banks of capacitors are switched by optically isolated control switches so as to be charged in parallel from the preceding stage or capacitor bank and to discharge in series to the succeeding stage or capacitor bank in alternating control cycles. The optically isolated control switches are controlled by a logic controller whose power supply is virtually immune to interference from the very high voltage output of the amplifier by the optical isolation provided by the switches, so that a very high voltage amplification ratio may be attained using many capacitor banks in cascade.

Abstract: In an interface circuit including a transmitting and receiving circuit which operates with an electric voltage supplying source composed of a DC/DC converter, the DC/DC converter includes a signal generation circuit generating a first signal having a first frequency, and a second signal having a second frequency lower than the first frequency, a comparator for comparing the elevated voltage with a reference voltage, and a selector for selecting one of the first and second signals and supplying the selected signal as the switching clock to the DC/DC converter. The selector is controlled by the comparator so as to supply the first signal as the switching clock to the DC/DC converter when the DC/DC converter is powered on, and to supply the second signal as the switching clock to the DC/DC converter when an absolute value of the elevated output voltage reaches the reference voltage.

Abstract: In a pulse forming electrical circuit suitable for use with a gas discharge laser having continuously falling impedance, there is provided a saturable inductor operable to cause the output impedance of the circuitry to vary with the current drawn by the load thereby ensuring that the matching between the impedance of the circuitry and the load to be better than would be the case if the impedance of the circuitry were fixed.

Abstract: Two storage capacitors connected in parallel with a constant current source in a charging mode and connected in series in a second mode to increase output voltage. A comparator senses the amplitude of the output voltage and controls the current supplied to the capacitors in the charging mode to increase or decrease the output voltage to coincide with a predetermined amplitude.

Abstract: Megavolt voltage multipliers having an output impedance of less than 10 ohms and capable of operating at high pulse repetition frequencies, are switched with high performance saturable core inductors having multiple windings to provide voltage and current rise times of less than 50 nanoseconds. Pulse generation is actively initiated by a HV thyratron operating below 40 kilovolts and in the radar mode for long life.

Abstract: A DC/DC voltage multiplier comprises a charging source (Vs) connected between first and second terminals (Vdd and Vss), a storage capacitor (Ctr) connected between the first terminal and a third terminal (Vdd and Vtr), a plurality of voltage pump stages each comprising four switches (S1a, S1b and S1c) and a pump capacitor (C1). The switches are actuated under the control of a clock (not shown) so that the pump capacitors of the stages are charged one at a time. The multiplied voltage output between the first and third terminals Vdd and Vtr of the circuit is provided by the charging source (Vs) and the pump capacitors in those stages not currently being charged (C2,C3). Any number of voltage pump stages can be used provided that the output of each stage is connected to the input of the following stage and the circuit is driven by an appropriate clock. The output of the final stage is connected to the input of the first stage so as to form a ring of pump stages.

Abstract: A maximum swing bipolar charge pump retains a cascode switching configuration for high breakdown. The charge pump includes a charge pump capacitor with a first plate connected to supply in the conventional manner. A first cascode-connected NPN transistor is utilized to switch the second plate of the pump capacitor to the supply. A second cascode-connected NPN transistor is utilized to switch the second plate of the pump capacitor close to ground. An additional bipolar biasing network holds the second NPN transistor out of heavy saturation when the second plate of the pump capacitor is switched close to ground, thereby preserving fast turn-off time and maximum voltage swing with the constraint of a bipolar cascode configuration.

Abstract: A charge pump circuit operates from a voltage provided on an input rail at a first potential relative to a reference potential rail and that provides second and third potentials relative to the reference potential rail on first and second output rails, respectively. The charge pump circuit includes first, second and third charge reservoir capacitors, an oscillator and control logic circuit for providing timing control signals, and a switch network responsive to the timing control signals for coupling the first, second and third capacitors in a plurality of configurations.

Abstract: A high-voltage generating circuit for generating a high voltage from a power voltage with a high efficiency is disclosed. The high-voltage generating circuit comprises a series circuit of a plurality of field effect transistors connected in series between a power voltage terminal and a high-voltage output terminal, a plurality of capacitors having one end connected to intermediate nodes of the field effect transistors, and first and second clock signal generators for generating first and second clock signals having larger value than the power voltage and different phases. The first and second clock signals are applied to the other ends of the respective two adjacent capacitors, respectively.

Abstract: A charge pump essentially incorporating parallel connections of low capacity charge pumps, where each low capacity charge pump is controlled by a clock signal, where the clock signal associated with a low capacity charge pump has a phase different than the other clock signals. Hence, the output of these essentially parallel connected charge pumps will have a ripple period which is a fraction of the period of any single clock signal, wherein the fraction is equal to 1/n, where n is the number of parallel low capacity charge pumps. This results in a ripple magnitude of 1/n that of charge pumps using a single clock source with identical input and output capacitance.

Abstract: A multiplexer circuit for effecting, in successive phases of operation, actuation of selected ones of respective groups of a plurality of capacitance actuated devices electrically represented by a plurality of series-connected capacitors, each device corresponding to an adjacent pair of the capacitors. The multiplexer includes a signal generator and a plurality of parallel electrical paths connected thereacrosss. Each path includes the common node formed by the capacitor pair corresponding to a respective one of the devices and first and second switches. A logic circuit is initially operable for respectively closing and opening the first and second switches of a selected path in one group and respectively opening and closing the first and second switches of the paths adjacent thereto for charging the two capacitors connected to the selected path.

Abstract: A dual mode high voltage coupler is described for enabling a low current capacity high voltage generator to supply high voltage to an output load, such as a row or word line in an EEPROM memory device during a nonvolatile write or erase operation. The coupler limits the amount of current to defective cells or rows in the memory without limiting current to the cells and rows that are operating normally. In a first mode, a single stage charge pump, including a storage capacitor driven by a periodic voltage signal, develops a metered current through a diode to the output load whose amplitude is equal to the product of the capacitance of the storage capacitor, the change in voltage across the capacitor in each cycle of said periodic signal and the frequency of said signal. In a second mode, said high voltage is coupled directly to said output load without limiting the current whenever the voltage across said load exceeds a predetermined value.

Abstract: A charge pump circuit is provided comprising a first MOSFET capacitor ("pumping capacitor"), two other MOSFET capacitors ("back-to-back capacitors") connected together with a common junction of the back-to-back capacitor in series with the pumping capacitor, a voltage clamp connected to the common node of all three MOSFET capacitors, and a diode for output of the charge pumped. A number of these charge pump circuits may be cascaded to form a multi-stage charge pump circuit. Each charge pump circuit may attain output voltage higher than the oxide breakdown voltage of each individual MOS capacitor. This charge pump circuit can also operate under low voltage power supply conditions.

Abstract: A high voltage power supply having energy storage, charging and switching elements and using an interruptible switch as the switching element for efficient, compact and safe operation. In a specific embodiment, the interruptible switch is implemented with at least one cold cathode grid-controlled, crossed field plasma switch and associated control circuit. The charging element is a Marx bank which can be capacitive or inductive. Embodiments with a single master-slave control arrangement, a pulse-forming network providing high voltage regulation, an inductive implementation with a plurality of switching elements in a single envelope with the cathode of at least one switching element being the anode of the next switching element are disclosed. A current amplifier and voltage regulator implemented with a cold cathode grid-controlled, crossed field plasma switch having a cathode, an anode and a control grid therebetween are disclosed.

Abstract: A monolithic integrated circuit containing an inverting/non-inverting voltage doubler charge pump circuit is disclosed for converting a unipolar supply voltage to a bipolar supply voltage of a greater magnitude. A dual-collector lateral junction transistor, formed during the conventional CMOS processing steps used to fabricate the MOS switches, is connected as a voltage clamp between a ground potential and the two bipolar DC output lines of the power supply circuit to assure correct start-up conditions for the circuit. Gain reduction devices are placed in the semiconductor substrate to collect minority carriers which would otherwise be injected into inherent parasitic four layer PNPN junction devices created as a result of the architecture of the circuit, to prevent latch-up of the four layer devices. In a preferred embodiment, an RS-232 receiver and transmitter are contained on the same monolithic integrated circuit as the dual charge pump power supply.

Abstract: Disclosed is an electrical power supply for use, for example, for a flash fusing device in an electrophotographic recording apparatus, in which a DC high voltage is generated from a low voltage of an AC power supply so that the high voltage DC energy is momentarily consumed or discharged. The electrical power supply is configured in a manner so that, in order to make unnecessary a charging capacitor and a current limiting resistor for preventing rectifier elements from being damaged, at least some of the rectifier elements are constituted by rectifying control elements such as thyristors or transistors and a control signal is given to those rectifying control elements so as to make the rectifying control elements be in an isolated state. By use of such a configuration, the electrical power supply can be reduced in size as well as in power loss. The effect can be fully exhibited not only in a fusing apparatus employing the electrical power supply but in a recording apparatus employing such a fusing apparatus.

Abstract: In a variable high-voltage generating circuit for an avalanche photodiode, a pulse oscillating circuit generates pulses, a current driving circuit current-amplifies the pulses, a Cockcroft-Walton circuit boosts and rectifies the pulses from the current driving circuit, and a low-pass filter is connected at the output of the Cockcroft-Walton circuit. The avalanche photodiode is connected in series with a first resistor, and the series connection is connected to receive the output of the low-pass filter. A series connection of a transistor and a second resistor is connected in parallel with the series connection of the avalanche diode and the first resistor. A control circuit applies a variable signal to the base of the transistor, thereby to vary the voltage applied across the APD.

Abstract: A high voltage stable pulse power supply 10 which includes a first power supply 11, ; a first capacitor 12 ; connected in parallel with the first power supply, a first switch 13 mounted in parallel with the first capacitor 12. The switch 13 selectively connects the first capacitor 12 to a load 14 so that the first capacitor 12 may discharge therethrough. An anti-droop network 15 is connected in series with the first capacitor 12. The anti-droop network 15 cancels droop in the output of the first capacitor 12 as it discharges into the load 14.In a specific embodiment, the anti-droop network 15 includes an inductive element 42 connected in series with the first capacitor 12 which is charged just prior to the activation of the first switch 13. The inductor 42 provides energy to compensate for the droop in the energy supplied by the first capacitor 12.

Abstract: integrated voltage multiplier circuit for low supply voltage. In order to improve the signal-to-noise ratio in battery-operated switched capacitor filter circuits in hearing aids, the range of modulation can be increased by doubling the supply voltage. A circuit for voltage multiplication in CMOS technology generates a negative voltage for a given voltage. In order to be able to utilize both clock phases, a two-stage embodiment is selected, both of these working onto a smoothing capacitor. The voltage multiplier circuit is driven by a fourth inverter stage and with a level converter having a connected, third inverter stage.

Abstract: The invention discloses an integrated high voltage generating system possessing a charge pump for boosting stepwise the potential of an output node sequentially from the value of a first supply voltage to the value of a second supply voltage in synchronism with the clock pulses applied through a capacitor, wherein the second supply voltage is supplied to the gate electrode of the output MOS transistor connected between the output node of the charge pump and the output terminal. In this constitution, since the gate potential of the output MOS transistor is fixed at the valve of the second supply voltage, the potential fluctuation due to clock pulses does not appear on the output voltage taken out of the output terminal.

Abstract: A voltage multiplier for a use in a non-volatile semiconductor memory and operated at a low operation voltage with a reduced area comprising a plurality of cascade-connected basic circuits.

Abstract: An electrostatic discharge testing device employs magnetic reed relays in a switching array for selectively routing high-voltage, fast rise-time signals. The contacts of the reed relays are copper plated to minimize skin effect and thus decrease rise-time. Interposed between the glass enclosure and the magnetic coil of each reed relay is a metal-plated dielectric sheet formed in a tube with the plated side facing out. The plating at each end of the tube is connected to a ground reference voltage via a resistor.

Abstract: A wholly integrated, multistage, CMOS voltage multiplier utilizes as a diode structure for transferring electric charge from an input node to an output node of each stage an enhancement type MOS transistor, the gate of which is coupled to the same switching phase to which the output capacitor of the stage is connected by means of a coupling capacitor. During a semicycle of charge transfer through said MOS transistor, the coupling capacitor charges through a second MOS transistor of the same type and having the same threshold of said charge transfer MOS transistor, connected in a diode configuration between the output node of the stage and the gate of the charge transfer MOS transistor, in order to cut-off the latter when reaching a voltage lower than the voltage reached by the output node by a value equal to the threshold value of said second transistor.

Abstract: A Marx high voltage generator with a fast rise time. Photoconductive semiconductor switches are sequentially triggered by a single laser via fiber optic bundles of different lengths. The switches serve to series connect a group of charged capacitors. Output is taken from the last capacitor which receives the voltage accumulated on all of the previous capacitors. Proper timing of the activation of each switch produces a fast rise time.

Abstract: A monolithic integrated circuit containing an inverting/non-inverting voltage doubler charge pump circuit is disclosed for converting a unipolar supply voltage to a bipolar supply voltage of a greater magnitude. The unipolar input voltage is placed across a first external transfer capacitor by a first set of MOS switches during a first time period. The unipolar input voltage source is placed in series with the first transfer capacitor and this series combination of voltages is placed across a first external reservoir capacitor by a second set of MOS switches during a second time period. The voltage appearing across the first external reservoir capacitor is placed on a second transfer capacitor during the first time period by a third set of MOS switches. The voltage across the second transfer capacitor is placed into a second external reservoir capacitor with its polarity inverted by a fourth set of MOS switches during the second time period.

Abstract: A charge pump circuit operates from a voltage provided on an input rail at a first potential relative to a reference potential rail and that provides second and third potentials relative to the reference potential rail on first and second output rails, respectively. The charge pump circuit includes first, second and third charge reservoir capacitors, an oscillator and control logic circuit for providing timing control signals, and a switch network responsive to the timing control signals for coupling the first, second and third capacitors in a plurality of configurations. The switch network also provides for the decoupling of the capacitors from between the input rail and the reference potential rail between transitions of these configurations.

Abstract: A converter device for converting signals between an RS-232 device and an RS-422 device. The converter device can either be self-powered, using signals at the I/O port of the RS-232 device to derive its operating voltages, or can be powered by an external voltage source when the I/O signals are not of sufficient magnitude to derive the operating voltages or there are a large number of devices connected in parallel by the converter device.

Abstract: A pulse high frequency power supply includes a plurality of power supply branches connected between the input and the output of the supply. Each power supplying branch includes a capacitor which can be charged by a first silicon-controlled rectifier and subsequently discharged by a second silicon-controlled rectifier. A control circuit, which can include a microcomputer, generates sequences of pulses to charge each storage capacitor in each branch at a predetermined time and to discharge each charged capacitor thereby providing a plurality of temporally spaced-apart current pulses to the load.

Abstract: This invention relates to an integrated high voltage generating system provided with a charge pump for raising the input power supply voltage sequentially while transferring the electric charges of the capacitors on a stage by stage basis, by serially connecting unit circuits composed of diode elements and capacitors, and supplying clock signals of mutually opposite phases to adjacent capacitors. Source and drain electrodes of a MOS transistor are connected between the first power supply output terminal and a second power supply output terminal, and the gate electrode of this MOS transistor is connected to the input end of any one of the unit circuits of the charge pump, wherein the voltage of the first power supply output terminal is stepped down depending on the voltage applied to the gate electrode of the MOS transistor, and is delivered to the second power supply output terminal.

Abstract: This invention relates to a device for storing very high voltage electrical energy, of the type comprising a plurality of capacitor stages of which each is in the form of a ring and is provided, at each of the end faces of the corresponding capacitor, with at least one electrode, said rings being coaxial and distributed along their common axis, each electrode being radial with respect to the corresponding ring and being constituted by a thin metal band of which the plane is of general direction perpendicular to said common axis and parallel to said end faces of said rings, wherein, at least concerning certain portions of said electrodes which lie opposite an end face of the corresponding capacitor stage, the longitudinal edges of said electrodes are rounded, so as not to present any longitudinal end edge opposite said end face.

Abstract: A circuit for extending the operation of an electrical load after interruption of its power source. The circuit includes bulk capacitors charged by the power source and regulated to a predetermined voltage near their peak-voltage rating. The bulk capacitors are isolated from the power source capacitors during normal power source operation. When the power source is interrupted, the bulk capacitors are used to hold-up the load. The circuit obtains maximum hold-up time for a given physical bulk capacitor size, while also providing a consistent hold-up time over a range of power source voltages.

Abstract: A monolithic integrated circuit containing an inverting/non-inverting voltage doubler charge pump circuit is disclosed for converting a unipolar supply voltage to a bipolar supply voltage of a greater magnitude. The unipolar input voltage is placed across a first external transfer capacitor by a first set of MOS switches during a first time period. The unipolar input voltage source is placed in series with the first transfer capacitor and this series combination of voltages is placed across a first external reservoir capacitor by a second set of MOS switches during a second time period. The voltage appearing across the first external reservoir capacitor is placed on a second transfer capacitor during the first time period by a third set of MOS switches. The voltage across the second transfer capacitor is placed into a second external reservoir capacitor with its polarity inverted by a fourth set of MOS switches during the second time period.

Abstract: A charge pump circuit and associated method is provided for outputting either a positive or a negative output voltage, or both, which each may have a predetermined magnitude which is an integer multiple of the magnitude of a power supply voltage used to power the circuit. In one form, a first capacitor is charged to the power supply voltage. The first capacitor is coupled to the power supply voltage to develop a double voltage transfer supply with the supply voltage. Second and third capacitors are charged by the double voltage transfer supply. The second capacitor is used to store the charge from the first capacitor for a continuous output voltage having a magnitude which is twice the magnitude of the power supply. The third capacitor may be reconfigured to generate a negative transfer voltage. The negative transfer voltage is used to charge a fourth capacitor which provides a negative output voltage with twice the magnitude of the power supply voltage.

Abstract: A liquid crystal display control device, in accordance with the present invention, for supplying a voltage signal to drive a liquid crystal display unit comprises a boosting circuit, and a segment signal circuit and/or a common signal circuit. The boosting circuit includes a dc power supply first capacitor connected between a plurality of first group switches and to be connected in parallel to said dc power supply when the first group switches are operated, a plurality of second group switches, second boosting capacitor connected between the other polarity of the dc power supply and one end of the other switch of the second group switches. One of the second group switches is connected between one polarity of the power supply and one end of the first capacitor. A third electronic switching means is connected to the boosting circuit in parallel to the second capacitor for discharging the voltage charged in the second capacitor.

Abstract: A voltage doubler circuit and system incorporating a plurality of such circuits for energizing in an alternating sequential manner a greater plurality of fuel injectors arranged in groups corresponding to the number of voltage doubler circuits.

Abstract: A monolithic integrated circuit containing an inverting/non-inverting voltage doubler charge pump circuit is disclosed for converting a unipolar supply voltage to a bipolar supply voltage of a greater magnitude. The unipolar input voltage is placed across a first external transfer capacitor by a first set of MOS switches during a first time period. The unipolar input voltage source is placed in series with the first transfer capacitor and this series combination of voltages is placed across a first external reservoir capacitor by a second set of MOS switches during a second time period. The voltage appearing across the first external reservoir capacitor is placed on a second transfer capacitor during the first time period by a third set of MOS switches. The voltage across the second transfer capacitor is placed into a second external reservoir capacitor with its polarity inverted by a fourth set of MOS switches during the second time period.

Abstract: A monolithic integrated circuit containing an inverting/non-inverting voltage doubler charge pump circuit is disclosed for converting a unipolar supply voltage to a bipolar supply voltage of a greater magnitude. The unipolar input voltage is placed across a first external transfer capacitor by a first set of MOS switches during a first time period. The unipolar input voltage source is placed in series with the first transfer capacitor and this series combination of voltages is placed across a first external reservoir capacitor by a second set of MOS switches during a second time period. The voltage appearing across the first external reservoir capacitor is placed on a second transfer capacitor during the first time period by a third set of MOS switches. The voltage across the second transfer capacitor is placed into a second external reservoir capacitor with its polarity inverted by a fourth set of MOS switches during the second time period.

Abstract: An exponential multiplication power supply is described which is comprised of a plurality of stages each having the ability to store energy and each having a plurality of states, including at least a store state and a stack state. The plurality of stages are arranged in a network such that an input stage in the network is connected to receive a voltage from an external power source and all subsequent stages are connected to at least one other stage for receiving voltage from and through the other stages. A control mechanism is attached to the network stages and operates to place these stages in a repeating sequence of states such that at least one of the stages receives a voltage which is the sum of the voltages stored in at least two other stages. When a stage is receiving voltage or holding voltage it is said to be in the store state, and when a stage is combined with other stages to present an increased voltage, it is said to be placed in the stack state.

Abstract: A voltage multiplier circuit is disclosed. The circuit comprises three p-channel MOS transistors and three capacitors. When these elements are connected to properly phased transfer and pump clock signals of positive polarity, the circuit generates a negative output voltage which is roughly equal in magnitude to the peak-to-peak voltage of the pump clock. One of the transistors couples the output node to the circuit input node, and is clocked by the transfer clock so as to isolate the input node from the output node when the output node potential is lower than the input node potential. Several of the circuits may be cascaded to produce a large negative supply from a small positive supply. The circuit is advantageously employed to provide the programming signal supply for EEPROM devices.