Abstract: In a multiple output multiple step-up rectifier circuit of the invention, an output voltage of a power source circuit is supplied to a plurality of Crockroft-Walton multiple step-up rectifier circuits connected in parallel with each other. The capacitor capacitance ratio of the rectifier circuits is proportional to the ratio of the numbers of multiplication stages of respective rectifier circuits. Particularly, when the squares of the number of multiplication stages is comparatively large, the capacitor capacitance ratio is set to be proportional to n1.sup.2 /n2.sup.2 where n1 and n2 are the numbers of multiplication stages of two rectifier circuits of the plurality of rectifier circuits. When the number of multiplication stages is small, the capacitor capacitance ratio is set to be proportional to:(2n1.sup.2 /3+n1/2-1/6)/(2n2.sup.2 /3+n2/2-1/6).The power source circuit can change its output voltage such that the output of any of the plurality of rectifier circuits is the same in the non-load and load states.

Abstract: A multiple step-up rectifier circuit has a transformer, diodes connected in series with each other, and first, second, third and fourth capacitors. An AC signal source is connected to a primary winding of the transformer. A neutral point of a secondary winding of the transformer is grounded. One terminal of a series circuit of the diodes is connected to the neutral point such that the diodes are biased in the same direction. The first capacitor is connected across the two terminals of a series circuit of the diodes. The second capacitor is connected to a first output terminal of the secondary winding of the transformer and the common connecting point of a first pair of diodes. The third capacitor is connected between a second output terminal of the second winding of the transformer and the common connecting point of a second pair of diodes. The fourth capacitor is connected between a third output terminal of the secondary winding of the transformer and the common connecting point of a third pair of diodes.

Abstract: A multiple step-up rectifier circuit comprises a transformer, a series circuit of diodes, a first series circuit of capacitors, a second series circuit of capacitors and a third series circuit of capacitors. An AC signal source is connected to the primary winding of the transformer. The secondary winding of the transformer has a tap connected to the ground. The tap is also connected to one end of the series circuit of diodes, so that the diodes are biased in the same direction. The first series circuit of capacitors is connected between both ends of the series circuit of diodes. The second series circuit of capacitors is connected between one end of the secondary winding and a connecting point between the diodes. The third series circuit of capacitors is connected between the other end of the secondary winding and another connecting point between the diodes. A connecting point between the capacitors is also connected to a connecting point between the diodes.

Abstract: A multiple step-up rectifier circuit has a transformer, diodes connected in series with each other, and first, second, third and fourth capacitors. An AC signal source is connected to a primary winding of the transformer. A neutral point of a secondary winding of the transformer is grounded. One terminal of a series circuit of the diodes is connected to the neutral point such that the diodes are biased in the same direction. The first capacitor is connected across the two terminals of a series circuit of the diodes. The second capacitor is connected to a first output terminal of the secondary winding of the transformer and the common connecting point of a first pair of diodes. The third capacitor is connected between a second output terminal of the second winding of the transformer and the common connecting point of a second pair of diodes. The fourth capacitor is connected between a third output terminal of the secondary winding of the transformer and the common connecting point of a third pair of diodes.

Abstract: A rectifier circuit comprises a transformer having a primary winding connected to an an AC power source, a first diode whose anode is connected through a first capacitor to one end of a secondar winding of the transformer, a second diode whose cathode is connected through the first capacitor to the one end of the secondary winding, and a second capacitor connected between the cathode of the first diode and the anode of the second diode. A third capacitor is connected between the anode of the second diode and the other end of the secondary winding, and a third diode is connected between the anode of the second diode and the second capacitor and in the same rectifying direction as those of the first and second diodes, and the tap of the secondary winding is grounded.

Abstract: A single-ended switching circuit is constituted by a primary winding of a transformer, a switching circuit connected between the primary winding and a DC power supply and on-off operated with a predetermined cycle and also with a predetermined "on" period and a resonance capacitor connected in parallel with the primary winding. A magnetic amplifier, a rectifying element and a choke coil are connected in series between a secondary side circuit of the transformer and the load. The magnetic amplifier includes a saturable reactor which is held saturated during a half cycle of the voltage induced in a secondary winding of the transformer and remains unsaturated during the other half cycle of the voltage.

Abstract: A switching element is connected between a power supply and the primary winding of a transformer, and it is on-off controlled with a predetermined cycle and with a predetermined conducting period. The secondary winding of the transformer is connected to a parallel circuit of a filtering capacitor and a load via a rectifier diode and a choke coil. A closed circuit, to which the reflux current of the choke coil flows through the parallel circuit of the filtering capacitor and load, is formed by a reflux diode.

Abstract: A switching element, a transformer having a primary winding connected through said switching element to a DC power supply and a resonance capacitor connected in parallel with the primary winding of said transformer constitute a single-ended switching circuit. A magnetic amplifier is connected between the secondary side circuit of the transformer of the single-ended switching circuit and a rectifying/smoothing circuit, thus forming a high frequency switching circuit.

Abstract: An image pick-up tube assembly, including an image pick-up tube having a target provided in the front portion thereof, a coil assembly surrounding the image pick-up tube, a cylindrical shield case housing the image pick-up tube and the coil assembly, and front and rear shield caps covering the front and rear openings of the shield case. The front shield cap is mounted to the shield case such that both horizontal and vertical contact planes are formed therebetween to significantly reduce the influence of the earth's magnetism on the assembly so that a three tube type television camera employing three such assemblies is effected much less by direction dependent color deviation.

Abstract: A scanning area rotation device for an image pick-up tube is provided with a focusing coil enclosing the image pick-up tube and a rotation coil surrounding the vicinity of the target face of the image pick-up tube. A first integration value is calculated by integrating a magnetic flux density, which is developed by the focusing coil, distributing from the target face toward an electron gun of the image pick-up tube with respect to a distance along a tube axis of the image pick-up tube. A second integration value is calculated by integrating a magnetic flux density, which is developed by the rotation coil, distributing from the target face toward the electron gun with respect to a distance along the tube axis. In order to rotate the scanning-area on the target face without off-focusing of the electron beams scanned on the target face, current flowing through the rotation coil has a value allowing the ratio of the second to first integration value to be less than 1/100 in absolute value.