Showing papers on "Voltage multiplier published in 1982"

Method of fabricating an integrated circuit voltage multiplier containing a parallel plate capacitor

Abstract: Disclosed is a process which is fully compatible with normal two layer polysilicon SNOS process and provides polysilicon parallel plate capacitors and silicon gate non-memory MOS transistors (diodes) for constructing therefrom an on-chip, dual polarity high voltage multiplier. From the polysilicon I layer deposited over a gate oxide, the polysilicon I resistor, the non-memory device gate and the capacitor lower plate are formed. Then, the resistor, non-memory device gate and active region and the periphery of the capacitor lower plate are covered with an isolation oxide. Next, a dielectric, e.g., oxide-nitride, and polysilicon II layers are formed over the structure. Polysilicon II is patterned into interconnect, gate for SNOS memory device and capacitor upper plate, the latter having a plurality of holes therein. The dielectric is formed into SNOS device gate insulator and the capacitor insulator, the latter having holes in registration with the holes in the capacitor upper plate. Finally, by thermal diffusion of active impurities, all gates, interconnect and both capacitor plates are doped and all sources and drains for memory and non-memory devices formed.

Integrated circuit dual polarity high voltage multiplier for extended operating temperature range

Abstract: Disclosed is an on-chip, dual polarity high voltage multiplier circuit consisting of a main high positive voltage multiplier and high negative voltage multiplier and an auxiliary high negative voltage multiplier coupled to the main multipliers to prevent turning on of parasitic transistors associated with the MOS diodes of the main multipliers and thereby extend the operating temperature range to 150° C. and improve the fall time of the dual polarity multiplier. The auxiliary multiplier may be located in a common p-well with the main positive and negative multipliers or with the main negative multiplier and its output voltage is connected to this common well.

Voltage dividing circuit

Abstract: Voltage dividing circuits which are comprised of capacitors or resistors. In the case of a voltage dividing circuit comprised of capacitors (Fig. 5), the capacitors (C 1 , Cz) are connected each at one end to an output terminal (V out ) and at the other end connected alternately to two power sources (V 1 , V 2 ) through changeover switches (S 1 , Sz). The switches (S 1 , 8 2 ) are selectively operated so that the capacitors (C 1 , Cz) divide a voltage into fractions of that voltage. The average of the fractions of voltage is taken out as an output voltage (V out ). The averaging of the fractions of voltage cancels out the characteristic difference among the capacitors (Ci, C 2 ). The fractions of voltage are changed by varying the time during which each capacitor (C 1 , C 2 ) is connected to either power source (V 1 , V 2 ). In the case of a voltage dividing circuit comprised of resistors (Fig. 12), the resistors divide a voltage into fractions. The average of the fractions of voltage is taken out as an output voltage (V out ). The voltage dividing circuit may employ a method used in known voltage dividing circuits which comprise capacitors or resistors. In this case, the circuit can divide a voltage into smaller fractions of voltage than the known voltage dividing circuits. In other words, the circuit can enhance the resolution of the analog output signal.

High voltage ramp rate control systems

Abstract: In order to optimise the ramp rate of the h.v. supply in EEPROM and other charge storage supplies whilst not dissipating power nor loading the substrate bias generator, the ramp voltage V0 from a voltage multiplier (Figure 3) is applied to a regulating transistor T1 channel. The gate of the transistor is capacitively coupled to the ramp voltage terminal, and is connected to supply VS via constant current sink T2. If the ramp at V0 is too slow, T1 turns off, removing any current drain from the voltage multiplier. If the ramp is too fast, the capacitor couples a higher current than I1 to node V1, turning transistor T1 on more, and thus decreasing the ramp rate. T1 sinks current to earth rather than the substrate.

Resonant current-driven power source

Abstract: A resonant current-driven power source is disclosed. Preferably, the power source is a DC to DC converter regulator including an inductor and capacitor electrically coupled to one another and an input inverter which converts an input DC voltage into an AC voltage having substantially no DC component and applies the AC voltage across the inductor and capacitor in a manner which causes the inductor and capacitor to resonate with one another whereby an AC voltage appears across the capacitor. An output circuit converts the AC voltage appearing across the capacitor into a DC output voltage. A control circuit is provided for controlling the operation of the inverter circuit in a manner which controls the magnitude of the output voltage.

Automatic "S" correction circuit

Abstract: An automatic S correction circuit for a resonant scan deflection circuit comprises a plurality of S-shaping capacitors. The peak voltage and the peak-to-peak voltage across the S capacitors are detected, and the number of effective capacitors is varied to maintain the peak voltage and the peak-to-peak voltage in a predetermined relationship.

High voltage supply system for medical equipment

Abstract: This disclosure relates to a system for supplying a stable DC high voltage to a load by resonantly driving a high voltage transforming circuit comprising a VLT and a capacitor type multiple boosting circuit. The system includes a VLT, a capacitor type multiple boosting circuit and a pulse-amplitude feedback control circuit designed to detect supply voltage to load, to compare the detected voltage with reference voltage and to control the voltage of the control winding of VLT by using the deviation produced by the comparison as a control signal.

High voltage generator for x-ray device

Abstract: PURPOSE:To stabilize the X-ray tube voltage equipped with multistage voltage multiplier circuit of Kockcroft-Walton by forming a feedback type DC stabilization circuit with single linear voltage control element CONSTITUTION:The capacitor charging voltage at the first stage of a multistage voltage multiplier circuit 16 is divided and inputed to a feedback type DC stabilization circuit employing a linear voltage control element 30 Then the difference between the tube voltage proportional signal Ea and the referential signal ei is amplified to control the impedance of the control element 30 Consequently of two input voltage variations due to the instable power source, or the voltage drop component due to the load variation and the power surce pulsating component the latter is absorbed by the control element 30 While the former component is inputed to the voltage control circuit 4 of a high frequency inverter 12 to control the voltage produced by an input transformer 12 Consequently X-ray tube voltage is stabilized

Triode x-ray grid controller

Abstract: PURPOSE:To reduce the size by connecting a filament to one of the secondary windings of a transformer while connecting a multistage voltage multiplier to the other and providing a grid voltage control circuit for varying the impedance linearly. CONSTITUTION:The secondary winding of a transformer 3 is divided into two and one is connected to the filament 10 of an X-ray tube 9 while the other is connected to Cockcroft-Walton multistage voltage multiplier circuit 4. The output is connected to a grid voltage control circuit 6 for varying the impedance linearly and controlled by a grid voltage control signal supply circuit 5 for comparing between one input obtained from a grid voltage feedback circuit and a grid voltage setting signal thus to control the voltage of the grid 11 of the X-ray tube 9. By employing a multistage voltage multiplier 4, the secondary voltage of the filament transformer 3 can be lowered while the manufacture is facilitated and the size is reduced.

Control circuit for stepping motor

Abstract: A control circuit for a stepping motor (13) comprises a voltage multiplier (14) which, in synchronism with the motor timing pulses OS from a pulse generator (11) multiplies the supply voltage PW in such a manner as to obtain an energising voltage PA which, at commencement of the excitation of each motor winding, has a value which is a multiple of the value of the supply voltage PW, in order to reduce the rise time of the current in the windings, and to thus improve the dynamic torque availability. A voltage doubler and tripler are described as examples of the circuit (14).

Electronic active-energy meter

Abstract: The invention relates to an electronic watt hour meter or active-energy meter with a pulse-width modulation circuit (14) which converts a voltage signal proportional to the load voltage across feed voltage lines into a pulse-width keying signal. In addition, a current/voltage converter (25) is provided which converts a current signal proportional to the load current on or in the feed voltage lines into a voltage signal. A multiplication circuit (31) outputs the product of the voltage signals under the control of the pulse-width keying signal as a pulse signal which is proportional to the instantaneous power consumption of the feed voltage lines. A filter circuit (32) integrates the pulse signal of the multiplication circuit (31) to form an integrated voltage signal. A voltage/frequency converter (35) converts the integrated voltage signal into a pulse signal which is proportional to the consumed power of the feed voltage lines. An automatic compensation circuit (46) integrates the pulse signal of the voltage/frequency converter (35) to form a feedback signal which is supplied to the input of the voltage/frequency converter (35) as a result of which the inherent offset voltage is eliminated which is caused by the pulse width modulation circuit (14), the current/voltage converter (25) and the voltage/frequency converter (35).

Assembly for TV receiver with core and line transformer winding - has cylindrical capacitors and rectifiers embedded in pourable compound

Abstract: The assembly is for a television receiver with a core limb made from magnetisable material. It is used for the windings of a line transformer. It also has another winding, which feeds a voltage multiplier formed by cylindrical capacitors and rectifiers to produce the high voltage for the tube and an image focusing voltage. The cylindrical capacitors (C1,C2,C3) have axes running parallel to the limb (2). They form an arc around the windings (6,8). All the components and the connecting leads are embedded in an insulating material (12). The insulating material is made from a pourable compound, which solidifies around the components.

Very high voltage generator with a high output

Abstract: The invention relates to pulse generators of a very high voltage, supplied from a source This device comprises a source A which provides low voltage energy to an oscillator B which is charged, at the output, by the set-up transformer C The secondary of this transformer attacks the voltage multiplier D, which stores a given energy at a very high potential, said energy being released on the load F by the threshold switching element E Amongst the most interesting applications of the invention, it may be mentioned an ignition generator for a combustion engine, an igniter for a lighter and a pulse generator for fences