Abstract: An electronically controllable resistor (ECR) designed for changing the resistance of a portion of a circuit comprises a voltage converter, a subtractor, an instrumental resistor (IR), and an executive element (EE) which can include at least one MOSFET or IGBT or a vacuum tube. There are a high-potential and two control voltage sources. The converter, which can use logarithmic amplifiers or be digital, is adapted to multiply the high-potential voltage by one of the control voltages and divide by another one. The resulting intermediate voltage is applied to the subtractor and compared therein with a voltage drop on the IR created by the current flowing through the IR and the EE. Thus, the ECR resistance can be regulated. The ECR makes it possible to achieve a wide range of resistance values, down to ultra-small values, while maintaining tolerance to destabilizing factors, including temperature. Also claimed is an ECR control circuit.

Abstract: An apparatus for DC voltage—DC voltage conversion comprises connected in series a high DC voltage source, a transformer, a rectifier, and a control voltage driver. Also connected in series are a primary winding of the transformer, a controllable switch, an electronically controlled resistor (ECR), and a limiting resistor. The ECR is controlled by the control voltage driver. The controllable switch is controlled by a controllable square wave generator. The controllable square wave generator and the controlled voltage driver are fed from a low DC voltage source. The controllable square wave generator is controlled by another control voltage driver fed from the high DC voltage source. The apparatus allows for obtaining variable value of high pulse voltage across the ECR and lowers the level of electromagnetic noise radiated by the apparatus to environment.

Abstract: A DC voltage-pulse voltage converter comprises connected in series a high DC voltage source, a first controllable switch, an inductive load, a second controllable switch, an electronically controlled resistor (ECR), and a limiting resistor, as well as a controllable square wave generator, and the first and the second control voltage drivers. Providing the second control voltage driver and the ECR allows regulating the value (amplitude) of the current flowing through the inductive load. As the amplitude of the current decreases, so does the level of EMI.

Abstract: An electronically controllable resistor (ECR) designed for changing the resistance of a portion of a circuit comprises a voltage converter, a subtractor, an instrumental resistor (IR), and an executive element (EE) which can include at least one MOSFET or IGBT or a vacuum tube. There are a high-potential and two control voltage sources. The converter, which can use logarithmic amplifiers or be digital, is adapted to multiply the high-potential voltage by one of the control voltages and divide by another one. The resulting intermediate voltage is applied to the subtractor and compared therein with a voltage drop on the IR created by the current flowing through the IR and the EE. Thus, the ECR resistance can be regulated. The ECR makes it possible to achieve a wide range of resistance values, down to ultra-small values, while maintaining tolerance to destabilizing factors, including temperature. Also claimed is an ECR control circuit.

Abstract: An apparatus for converting DC voltage into pulse voltage comprises connected in series a high DC voltage source, an inductive load, a controllable switch, an electronically controlled resistor a limiting resistor, as well as a controlled square pulse generator, a low DC voltage source and two control voltage drivers. The apparatus furnishes changeable output pulse voltage.

Abstract: A DC voltage—pulse voltage converter comprises connected in series a high DC voltage source 1, a first controllable switch 7, an inductive load 9, a second controllable switch 17, an electronically controlled resistor 59, a limiting resistor 80, as well as a controllable square wave generator 48, and two drivers, 40 and 83, of control voltage. Decrease of the level of pulse EMI radiated into environment is achieved.

Abstract: Apparatus for generating high pulse voltage comprises a high DC voltage source, a low DC voltage source, an inductive load, two controllable gates, a controllable switch and, connected in series, a capacitor, a booster diode and an additional controllable switch, as well as a controllable pulse duration converter for pulses from a rectangular pulse generator. The preceding connection of the booster diode anode with the negative terminal of the low DC voltage source ensured by the pulse duration converter and second controllable switch correlates the booster diode switching time with the moment of closing the both controllable gates. Thus, the pulse noise present in the prior art designs is eliminated, and the level of interference emitted into the surroundings is decreased.

Abstract: Apparatus for generating high pulse voltage comprises a high DC voltage source, a low DC voltage source, an inductive load, two controllable gates, a controllable switch and, connected in series, a capacitor, a booster diode and an additional controllable switch, as well as a controllable pulse duration converter for pulses from a rectangular pulse generator. The preceding connection of the booster diode anode with the negative terminal of the low DC voltage source ensured by the pulse duration converter and second controllable switch correlates the booster diode switching time with the moment of closing the both controllable gates. Thus, the pulse noise present in the prior art designs is eliminated, and the level of interference emitted into the surroundings is decreased.

Abstract: In a method of DC voltage—pulse voltage conversion, DC voltage is provided; a succession of controlling square pulses having adjustable pulse ratio is generated; an inductive load is periodically connected to outputs of a source of the DC voltage using the succession of the controlling square pulses; pulse current flowing through the inductive load is generated; a predefined value of resistance of an electronically-controlled resistor included in a circuit of the pulse current flowing through the inductive load is formed, and the pulse current is adjusted by the electronically-controlled resistor, whereby adjusting the level of pulse electromagnetic noise radiated to the environment is achieved.

Abstract: In a method of DC voltage—pulse voltage conversion, DC voltage is provided; a succession of controlling square pulses having adjustable pulse ratio is generated; an inductive load is periodically connected to outputs of a source of the DC voltage using the succession of the controlling square pulses; pulse current flowing through the inductive load is generated; a predefined value of resistance of an electronically-controlled resistor included in a circuit of the pulse current flowing through the inductive load is formed, and the pulse current is adjusted by the electronically-controlled resistor, whereby adjusting the level of pulse electromagnetic noise radiated to the environment is achieved.

Abstract: An apparatus for producing unvarying direct load current comprises a DC voltage source, a direct-voltage-to-pulse-voltage converter (DCPVC), a pulse-voltage-to-direct voltage converter (PDCVC), a DC stabilizer, and a load connected by one of its terminals to an output of the PDCVC and by another terminal to an input of the DC stabilizer, and a control circuit connected by one of its inputs to one of the terminals of the load, by another input to an output of the direct current stabilizer, and by an output to a control input of the DCPVC. As the load varies, a stabilizing voltage at the DC stabilizer is formed, and a direct load current, unvarying in a wide range of load variations, is produced.

Abstract: A device for generating a high pulse voltage comprises a source of high constant voltage, an inductive load, two controllable switching devices, a controllable switch, and also, connected in series, a capacitor, a diode and an additional controllable switch, and a controllable pulse duration converter for converting the duration of pulses from a control circuit. The result is a reduction in the level of interference emitted into the environment.

Abstract: A method for generating a high pulse voltage in an inductive load consists in periodically connecting an inductive load to the outputs of a source of high constant voltage using a first controllable switching device, periodically disconnecting and connecting a control circuit of a second controllable switching device using a first controllable switch, and also periodically supplying low voltage from an output of a source of low constant voltage to the control circuit of the second controllable switching device via a second controllable switch, thus eliminating conditions conducive to transient pulsed electromagnetic interference during the generation of a high pulse voltage in an inductive load.

Abstract: A method for generating a high pulse voltage in an inductive load consists in periodically connecting an inductive load to the outputs of a source of high constant voltage using a first controllable switching device, periodically disconnecting and connecting a control circuit of a second controllable switching device using a first controllable switch, and also periodically supplying low voltage from an output of a source of low constant voltage to the control circuit of the second controllable switching device via a second controllable switch, thus eliminating conditions conducive to transient pulsed electromagnetic interference during the generation of a high pulse voltage in an inductive load.

Abstract: A device for generating a high pulse voltage comprises a source of high constant voltage (1), an inductive load (2), two controllable switching devices (6) and (41), a controllable switch (25), and also, connected in series, a capacitor (20), a diode (22) and an additional controllable switch (28), and a controllable pulse duration converter (33) for converting the duration of pulses from a control circuit (14). The result is a reduction in the level of interference emitted into the environment.

Abstract: An apparatus for producing unvarying direct load current comprises a direct voltage source connected to a DC-to-pulse voltage converter connected through a first galvanic decoupler to a pulse-to-DC voltage converter connected to a first terminal of the load. Another terminal of the load is connected to a DC stabilizer connected to a control circuit which is connected through a second galvanic decoupler to a control input of the DC-to-pulse voltage converter. Disclosed are three versions of the apparatus differing by the way the load is connected. The apparatus provides unvarying direct current flowing through the load that can vary within a wider load range.

Abstract: A control circuit for a direct voltage—direct current converter comprising an operational amplifier 1, a feedback element 40 and a bias direct voltage source 7 at an input of the operational amplifier 1. The control circuit provides the separation of the bias voltage from the feedback signal thus resulting in decreasing watt consumption in the converter.

Abstract: An apparatus for producing unvarying direct load current comprises a direct voltage source connected to a DC-to-pulse voltage converter connected through a first galvanic decoupler to a pulse-to-DC voltage converter connected to a first terminal of the load. Another terminal of the load is connected to a DC stabilizer connected to a control circuit which is connected through a second galvanic decoupler to a control input of the DC-to-pulse voltage converter. Disclosed are three versions of the apparatus differing by the way the load is connected. The apparatus provides unvarying direct current flowing through the load that can vary within a wider load range.