A voltage converter is disclosed which converts an open circuit voltage from approximately 80 volts to about 120 volts DC. The voltage source which is converted is supplied by a welding machine. The converted voltage is used to power electric tools while drawing a relatively small amount of power from the welding machine. The converter includes a housing with two input leads for connection to the welding machine and an output receptacle in which electrical tools are plugged to receive power. Ins...

The present invention relates to a voltage multiplier for generating an output voltage which is several times greater than the operating voltage for connection of a load connected to ground to the operating voltage by means of an N-channel power MOS transistor, comprising a plurality of capacitors (C1, C2, C3), a control input (C) for supplying a control signal, an output (V.sub.out), an operating voltage terminal (Vb) and a ground terminal (M). In known voltage multipliers, for rectification an...

The invention concerns a low voltage-to-high voltage converter of the flyback type. The converter includes a transformer whose primary winding is linked to a supply voltage source via a switch and whose secondary winding is linked to the terminals of a capacitor via a rectifier diode. This converter includes, in a conventional manner, a secondary regulation loop which compares the output voltage appearing at the terminals of the capacitor, via a divider bridge, with a reference voltage in order ...

A programmable voltage comparator having a programmable hysteresis function controlling the comparator's output relative to first and second comparator input voltage variables. The programmable voltage comparator comprises an inverting and non-inverting input for receiving a first and second input voltages and an output providing a logic state signal reflecting the amplitude of the inverting and non-inverting input voltages. The comparator includes level shift circuitry coupled to the inverting ...

A voltage measurement circuit is provided which converts a voltage of a first voltage source connected in series with an offset voltage source to an output voltage, including first and second current mirrors for accurately measuring voltage so as to provide a proportional output voltage with the offset voltage removed. Further, voltage measurements can be precisely determined for each of a plurality of voltage sources, such as a plurality of electrochemical cells in a series electrical connectio...

A voltage regulator contains a reference which provides a value for comparison by an error amplifier which generates a control signal in response to the deviation of the output to the reference. As many stages of the circuit as possible are connected to fixed potential points. The fixed potential points are fixed with respect to the regulated output voltage. This provides a voltage regulator which is insensitive to interference signals from the unregulated supply voltage. The interference signal...

A device and electric circuit to supply a voltage to a consumer with means to switch over from a network to battery-powered operation.

A voltage comparator providing an indication of a voltage balance and separate indications of unbalance on either side of balance.

Voltage regulators designed for connection in series with an alternating current source and a load and employing a three-leg, two-window transformer are disclosed. Secondary windings on the two outer transformer core legs are interconnected to form a pair of secondary winding systems and the systems are interconnected via a variable resistance. Voltage regulation is achieved by varying the flux distribution in the transformer core by employing variable resistance to distribute the load current b...

A voltage detector with an optical modulator comprising a pulse light source for outputting light pulses, a pulse train generator for generating a light pulse train having a pulse interval with the aid of light pulses provided by the pulse light source and for applying the light pulse train to an optical modulator, and a detector for detecting the optical intensities of light pulses forming the light pulse train which are modulated by the optical modulator with a voltage waveform to be detected.