Abstract: In an electronic circuit having an integrated circuit (110) having a power supply terminal, a noise filter disposed adjacent to the integrated circuit, and a printed board (101) having a pattern for supplying a power supply to the power supply terminals of the integrated circuit through the noise filter, the noise filter consists of a transmission line type noise filter (121-124) for removing noises having a wide frequency band.

Abstract: An external cathode terminal (16) is adhered to one surface of a capacitor element while a prepreg (25) is adhered to another surface of the capacitor element. A reinforcement plate (26) is adhered to the prepreg. Heat and pressure are applied to the external cathode terminal, the prepreg, and the reinforcement plate to elute thermosetting resin from the prepreg in the side of the capacitor element, thereby sealing the side of the capacitor element with eluted material (27A, 27B). Inasmuch as transfer molding is not used as exterior package, the element never deforms by injection pressure of resin. It is possible to thin by a thickness of exterior package resin. Inasmuch as eluted thermosetting resin does not include a mold release agent, it has good adhesion for the external cathode terminal.

Abstract: In an electronic device supplying a DC power to an LSI chip (20), a noise filter (1) of a distributed constant type, having an input port (2, 3) and an output port (5, 4), is mounted on a circuit board (6). The noise filter (1) reduces high-frequency noise incoming thereto and allows DC current to flow therethrough. The input port (2, 3) is connected to a DC power line (7a) and a ground conductor (8a) on the circuit board (6). The output port (5, 4) is connected to a separate power conductor (7b) and a separate ground conductor (8b) which are connected to the LSI (20) mounted on the circuit board (6). In another embodiment, the LSI (20) is mounted on a different circuit board (17) to which the output port (5, 4) is connected through conductor pins (18, 19) standing on the circuit board (6).

Abstract: A noise filter (1) has a first impedance element (2) having an impedance value Z1, a second impedance element (3) having an impedance value Z2, a third impedance element (4) having an impedance value Z3, a first anode terminal (5), a second anode terminal (6), and a cathode terminal (7). Z1<Z2 and Z1<Z3 are satisfied. Both ends of a central conductor (2a) of the first impedance element (2) are connected to a first node (8) and a second node (9), respectively. Both ends of the second impedance element (3) are connected to the first node (8) and the first anode terminal (5), respectively. Both ends of the third impedance element (4) are connected to the second anode terminal (6) and the second node (9), respectively. The central conductor (2a) and a cathode conductor (2b) of the first impedance element (2) form a transmission line structure having the impedance value Z1. The cathode conductor (2b) is connected to the cathode terminal (7).

Abstract: A transmission line type noise filter includes a metal fine wire (1) made of valve-operational metal and serving as a central conductor, a capacitance forming portion (3) formed over a predetermined length on the periphery of the metal fine wire, and a conductor layer (2) formed on the surface of the capacitance forming portion and serving as an external conductor. The capacitance forming portion (3) includes a sintered body (11) formed on the metal fine wire and made of the foregoing valve-operational metal, a dielectric film (31) formed on the surface of the sintered body and serving as a dielectric, and a solid electrolyte layer (23) formed on the surface of the dielectric film.

Abstract: A battery pack is provided which can be suitably used in a case where charging of a dedicated secondary battery in a portable terminal device is difficult. The battery pack is mounted in a battery mounting section in a portable cellular phone (portable terminal device) proper. In the battery pack, alkaline accumulators are connected in series. Alkaline accumulators generate electromotive forces having a voltage (3V) being lower than that of the dedicated secondary battery. A power source circuit has a boosting-type DC/DC converter which boosts a voltage of the alkaline accumulators being connected in series at a level being same as that of the dedicated secondary battery (for example, 4.5V), and outputs the boosted voltage. An electrical double layer capacitor has a capacity to feed stable power to an internal circuit in which power consumption increases or decreases in a burst manner and is charged by application of an output of the power source circuit and stores the power.

Abstract: A solid electrolytic capacitor has an anode terminal and a cathode terminal for external electrical connection that are formed on one surface of a plate-like or foil-like anode member, and a cathode conductor layer formed such that it covers the area of the one surface of the anode member except for the portion where the anode terminal is secured. A first metal plate or metal foil functioning as the cathode terminal is closely joined to the one surface of the cathode conductor layer so as to cover the one surface of the cathode conductor layer. A second metal plate or metal foil is closely joined to the other surface of the cathode conductor layer so as to cover the other main surface of the cathode conductor layer. The first metal plate or metal foil and the second metal plate or metal foil function to intercept the ventilation between the anode member and the outside.

Abstract: A non-aqueous electrolyte secondary battery comprising: a case comprising a bottom and a sidewall; a rolled body comprising: a positive electrode comprising a first electric plate and a positive electrode active material applied on the first electric plate; a negative electrode comprising a second electric plate and a negative electrode active material applied on the second electric plate; and a separator inserted between the positive electrode and the negative electrode; wherein the rolled body is formed by laminating and rolling the positive electrode, the negative electrode, and the separator; and wherein the rolled body is enclosed in the body; non-aqueous electrolyte enclosed in the case; a header used for sealing the case; a plurality of positive electrode leads connecting the positive electrode and the header; a plurality of negative electrode leads connecting the negative electrode and a bottom of the case; and holding means for holding the rolled body so that the rolled body does not relatively move

Abstract: In a non-aqueous electrolyte secondary battery in which a battery element which is constructed by forming an anode active material layer and a cathode active material layer on an anode collecting body and a cathode collecting body, respectively, and laminating and winding them together with two separators, is housed in a battery can. An electrical connecting member for electrical connection between an inner electrode lead and an external terminal is designed to have spring property so that a winding core is pressurized and fixed to the center of the battery can, and the battery is structured such that connection between the inner lead and the connecting member can be made on an end face of the winding core inside of the battery can.

Abstract: A nonaqueous electrolyte secondary battery having a cylindrically shaped battery element includes positive and negative electrodes and a separator sandwiched between the positive and negative electrodes. Each of the positive and negative electrodes has an active material free region, on which no active material is applied. The active material free region has a projecting edge region which projects or extends beyond a first side edge of the separator, wherein a first end of the cylindrically shaped battery element includes the projecting edge region of the active material free region of one of the positive and negative electrodes, and the first end of the cylindrically shaped battery element has a depressed portion. An electrode tab has a first portion engaged within and welded to the depressed portion and a second portion electrically in contact with an electrode terminal.

Abstract: A laminated piezoelectric transformer has one through-hole formed in the laminated piezoelectric transformer at a center position which becomes a node of vibration of the laminated piezoelectric transformer, and a support rod member is inserted in the through-hole and bonded to the through-hole by a bonding agent, for supporting the laminated piezoelectric transformer.

Abstract: A piezoelectric transformer element includes a piezoelectric plate made of a ceramic material, and input and output electrodes formed on the piezoelectric plate, and outputs a voltage from the output electrode upon application of a voltage to the input electrode. A reinforcing layer is selectively disposed on that portion of the piezoelectric plate where tensile stress concentrates when the piezoelectric transformer element is driven. The reinforcing layer is made of a material having the same composition as that of the ceramic material forming the piezoelectric plate and a particle size, after sintering, smaller than that of the ceramic material.

Abstract: A piezoelectric transformer element includes electrodes formed on a maximum-area of the front surface and rear surface of a long-plate shaped piezoelectric body. A case in which the piezoelectric transformer element is housed includes first lead terminals and second lead terminals. The first lead terminals press the electrodes on the front surface of the piezoelectric transformer element and are electrically connected to the electrodes. The second lead terminals press the electrodes on the rear surface of the piezoelectric transformer element and are electrically connected to the electrodes. The piezoelectric transformer element is held within the case by the first and second lead terminals and ring-shaped elastic bodies in which the piezoelectric transformer element is inserted. Thus, inhibition of vibration of the piezoelectric transformer element is suppressed and energy conversion efficiency of the piezoelectric transformer element is improved.

Abstract: A stacked piezoelectric transformer is formed by stacking piezoelectric ceramic sheets each formed with internal electrodes at their predetermined regions, and has portions formed with the internal electrodes as input portions, and a portion not formed with the internal electrodes as an output portion. Ceramic layers, which are formed by mixing a small amount of metal powder to a ceramic powder made of the same material as that of the piezoelectric ceramic sheets, are formed among layers of the output portion. A method of manufacturing a stacked piezoelectric transformer includes the steps of forming an internal electrode at a predetermined region of a piezoelectric ceramic sheet, forming a ceramic material at the remaining region of the piezoelectric ceramic sheet, and stacking a plurality of piezoelectric ceramic sheets each obtained in this manner.

Abstract: The piezoelectric layers of a laminated piezoelectric transformer include outermost ceramic layers having first openings defined therein for connection to inner electrodes. The inner electrodes comprise full-face electrodes, each of the inner electrodes having a second opening defined in a corner thereof and filled with an electrically conductive electrode and a third opening defined in another corner thereof and filled with an electrically conductive electrode surrounded by an electrode-free gap. The piezoelectric layers are stacked such that the inner electrodes are alternately electrically interconnected through the-second and third openings which are alternately superposed one on another. The electric generator comprises piezoelectric layers and web-shaped inner electrodes. Each of the web-shaped inner electrodes has a fourth opening defined in at least one end thereof and filled with an electrically conductive electrode.

Abstract: A piezoelectric transformer includes strip form electrodes on opposing upper and lower surfaces of a piezoelectric ceramic plate formed by screen printing using a conductive paste. By using strip form electrodes, discharge of a driving portion during polarization, degradation of reliability of mechanical strength due to excessive stress in a power generating portion during polarization, and instability of transformer output due to breakage of the electrode is prevented.

Abstract: In order to achieve the above and other objects, a piezoelectric transformer unit is provided. The unit contains a piezoelectric transformer element, a first upper electrode, a first lower electrode, an insulator casing, a first lead terminal, and an insulator elastic member. The piezoelectric transformer element has a upper element surface, a lower element surface, and a first side element surface. The first upper electrode is formed on the upper element surface of the piezoelectric transformer element, and the first lower electrode is formed on the lower element surface of the piezoelectric transformer element. The insulator casing houses the piezoelectric transformer element. The first lead terminal protrudes from an inner surface of the insulator casing, supports the piezoelectric transformer element within the insulator casing, and vertically presses the an oscillation nodal point of the piezoelectric transformer element.

Abstract: A piezoelectric transformer is described that features high energy-conversion efficiency and high reliability. Four driver piezoelectric ceramic plates are provided on the upper and lower surfaces at both ends of a generator piezoelectric ceramic plate having a rectangular shape, the driver piezoelectric ceramic plates having the same width and one-third the length of the generator piezoelectric ceramic plate. Vibration is not hindered and the energy-conversion efficiency is therefore increased in this construction because the draw-out positions of the four input electrodes and three output electrodes are all positioned at the nodes of mechanical vibration. In addition, the reliability of lead wire connections is improved because vibration places no load on the lead wires. Finally, input capacitance and step-up capabilities can be raised by adopting a multilayer construction for the driver piezoelectric ceramic plates.

Abstract: A laminated step-down piezoelectric transformer has a driving portion 11 and an electric power generating portion 12 disposed on both end portions of an elongated plate. These portions are formed by alternately laminating piezoelectric members 111 and internal electrodes 112 . . . interposed by an insulating portion respectively. The piezoelectric members 111 of the driving portion 11 are thicker in thickness than that of the electrical power generating portion 12. The transformer is driven with a second-order mode in the longitudinal direction so that the transformer has a high transformation efficiency. Impedance matching can be realized easily. The piezoelectric transformer is safe in operation by separating the input and the output from each other.

Abstract: The piezoelectric layers of a laminated piezoelectric transformer include outermost ceramic layers having first openings defined therein for connection to inner electrodes. The inner electrodes comprise full-face electrodes, each of the inner electrodes having a second opening defined in a corner thereof and filled with an electrically conductive electrode and a third opening defined in another corner thereof and filled with an electrically conductive electrode surrounded by an electrode-free gap. The piezoelectric layers are stacked such that the inner electrodes are alternately electrically interconnected through the second and third openings which are alternately superposed one on another. The electric generator comprises piezoelectric layers and web-shaped inner electrodes. Each of the web-shaped inner electrodes has a fourth opening defined in at least one end thereof and filled with an electrically conductive electrode.