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| Number | Title | Issue Date |
| 6692609 | Method for manufacturing laminated electronic component A method for manufacturing a laminated electronic component, in which magnetic layers and conductive patterns for coil are sequentially provided, a coil pattern is enclosed between the magnetic layers inside a laminated body, and a nonmagnetic section is ... | 02/17/2004 |
| 6153921 | Diode device Disclosed is a diode device in which two electrodes of regions forming both terminals are provided on the same face, thereby enabling the device to be connected to a circuit substrate by face-down bonding. Since a region is located within the semiconducto... | 11/28/2000 |
| 6008527 | Diode device A diode device for face down bonding use comprising: a semiconductor main body; a first region for forming an electrode, the region being exposed at a first surface of the semiconductor main body; a first electrode provided in the first region; a second r... | 12/28/1999 |
| 5999066 | Interface module for a sending section and a receiving section An interface module having a receiving section and a sending section, the receiving section being provided with a low pass filter, an isolation transformer and a common mode choke transformer, and the sending section is provided with a low pass filter, an... | 12/07/1999 |
| 5905948 | High frequency channel selecting circuit for radio receiver and method of manufacturing tuning circuits therefor A therefor method of manufacturing tuning circuits for constituting a high frequency channel selecting circuit for a radio receiver. The method can eliminate the complicated coil inductance adjustment for tracking on the circuit board, so that the circuit... | 05/18/1999 |
| 5828206 | Serial control type voltage regulator The disclosed serial control type voltage regulator can prevent current from flowing from a backup capacitor (C1) to the side of the voltage regulator, when the control transistor (Q1) stops operating, reducing the power consumption of the backup voltage ... | 10/27/1998 |
| 5678212 | Electronic tuning circuit for an AM receiver An electronic tuning circuit for an AM radio receiver in which a signal of a specific frequency is selected from the input signal from an antenna is provided, this tuning circuit having a tuning transformer with a first winding and a second winding, the n... | 10/14/1997 |
| 5589884 | Adaptive quantization controlled by scene change detection A picture transmission system for compressing picture information to transmit compressed picture information is provided. The picture transmission system includes, on the transmitter side, circuitry for realizing scene change detecting function. This circ... | 12/31/1996 |
| 5493329 | Picture transmission system A picture transmission system used in a picture remote surveillance system or a visual telephone, etc. is provided. This picture transmission system includes, on the transmitter side, an A-D converter for converting an analog video input signal into a dig... | 02/20/1996 |
| 5446427 | Balanced low-pass filter The present invention relates to a balanced low-pass filter characterized in comprising a pair of input terminals and a pair of output terminals, wherein a pair of coils is connected in series in a negatively coupled manner between a first input terminal ... | 08/29/1995 |
| 5440225 | Core for coil device such as power transformers, choke coils used in switching power supply The invention pertains to a core for a coil device of a switching power supply which can avoid accidental breakage of the portion where the core cross-sectional area narrows. When one core segment is rotated 180 degrees about its center axis in the long d... | 08/08/1995 |
| 5338966 | Variable capacitance diode device There is provided a variable capacitance diode device. The device comprises a semiconductor substrate of a first conductive type, an epitaxial layer of the first conductive type with a high specific resistance formed on the semiconductor substrate, a firs... | 08/16/1994 |
| 5296830 | Choke coil An object of the present invention is to provide a structure for a choke coil which facilitates making choke coils more compact, thinner and easier to manufacture. The structure uses a band-shaped conductor, the terminal portions at both ends are fixed in... | 03/22/1994 |
| 5285177 | Antenna sharing device using mutually coupled resonant circuits An antenna sharing device having a transmission filter connectable between a branch node of an antenna and a transmitter and a reception filter connectable between the branch node and a receiver. At least one of the transmission filter and the reception f... | 02/08/1994 |
| 5220193 | Variable-capacitance diode device with common electrode A plurality of variable-capacitance diode elements are formed in the top of a semiconductor substrate. The rear surface of the substrate is connected to a first lead frame that acts as a common electrode for one electrode from each of the variable-capacit... | 06/15/1993 |
| 5184105 | Bobbin for multiple-connected inductor A bobbin for a multiple-connected inductor characterized in that three flanges or more and winding grooves for coils partitioned by the flanges are formed by synthetic resin, and that a metal piece exposed to the outside at the portion of each flange to s... | 02/02/1993 |
| 5177429 | DC power source circuit A series type d.c. power source circuit having a comparator for comparing a voltage detected by a current detector with a reference voltage and generating an overcurrent detection signal; and a controller connected in series with a power source line for c... | 01/05/1993 |
| 5153547 | High frequency coil A bobbin provides a coil wound on the outer peripheral surface and allows a threaded core to be screwed on the inner peripheral surface. This bobbin is covered with a jar-like core and a metal case. The jar-like core and the metal case provide through hol... | 10/06/1992 |
| 5111372 | DC-DC converter A DC-DC convertor includes a transformer having a primary winding adapted to be connected in series with a DC power source and a secondary winding, a rectifier and smoothing circuit, a main switching device, adapted to be connected in series with the DC p... | 05/05/1992 |
| 5086381 | DC-DC converter A DC-DC converter includes a transformer and a switching element. The primary winding of the transformer and the switching element are connecting in series with a DC power source. A DC output is extracted via a rectifier circuit connected to a secondary w... | 02/04/1992 |
| 5072332 | Heat-dissipating structure for a switching power supply A heat-dissipating structure for a switching power supply characterized in that the respective portions of the power supply lines on the hot side and the cold side connected respectively to the output terminals after a switching element are formed by plat... | 12/10/1991 |
| 5066932 | Helical filter A helical filter is provided which includes a plurality of coupled helical coils each wound around one of a plurality of substantially parallel elongated bobbins having first and second end portions. Each of the coils has an open end at a first end thereo... | 11/19/1991 |
| 5032968 | Switching power source with inrush current limiting circuit A switching power source having a rectifier circuit and smoothing capacitor for obtaining a d.c. power from an a.c. input, an oscillator circuit constructed of a serial circuit of a primary winding of a power transformer and a switching element for interm... | 07/16/1991 |
| 4992693 | Piezo-resonator A piezo-resonator comprises a supporting frame having a recess for attaching a piezoelectric resonator element. This recess consists of three portions, that is, a central portion, a pair of connecting portions which are outside of the central portion and ... | 02/12/1991 |
| 4943794 | Molded coil and manufacturing method thereof A molded coil directly connected face to face to a conductor pattern of a circuit board, for eliminating unnecessary dimensions for pulling out end parts of the coil as face-to-face connection terminals, comprises at least one coil arranged along a vertic... | 07/24/1990 |
| 4932064 | Semiconductor device A semiconductor device characterized in that at least two elements having approximately the same area are formed on the same chip, the two elements are so disposed as to be sectionalized by a street, having an angle with respect to any scribe lines along ... | 06/05/1990 |
| 4841264 | Ladder-type ceramic filter A ladder-type ceramic filter is formed of a plurality of series and parallel resonators arranged in series and in parallel between the input and output terminals. In this filter, a series resonator on the side of the input terminal has a resonant frequenc... | 06/20/1989 |
| 4837533 | Ladder-type ceramic filter A ladder-type ceramic filter formed of a plurality of series and parallel resonators arranged in series and in parallel between the input and output terminals. In this filter, resonators are arranged in a manner that a resonator (or resonators) in which e... | 06/06/1989 |
| 4831661 | RF tuning circuit A RF tuning circuit according to this invention is composed of one tuned transformer (T1) at least and an untuned transformer (T2) so interconnected that the outputs from the respective transformers add up opposite in phase on that s... | 05/16/1989 |
| 4814724 | Gain control circuit of current mirror circuit type A gain control circuit of the current mirror circuit type in which a current source for a first current mirror circuit is constituted with the output stage of another current mirror circuit. Among the junctions of the first current mirror circuit and the ... | 03/21/1989 |
| 4760325 | High frequency coil arrangement A high frequency coil arrangement, comprising an input side coil and an output side coil electromagnetically coupled with each other, the input side coil being divided into two coil elements having substantially equal inductances by provision of a tap, ch... | 07/26/1988 |
| 4725768 | Switching regulated power supply employing an elongated metallic conductive inductor having a magnetic thin film coating An inductor and a switching means are combined in such a way that the storage of the energy in the inductor and the release of the energy stored in the inductor are repeatedly carried out, whereby the released energy is rectified and smoothed to obtain a ... | 02/16/1988 |
| 4725805 | Electric current control type variable inductor The construction of cores in an electric-current-controlled type variable inductor used in radio receivers is disclosed. The inductors have three or four cores. In the case of the variable inductors of the type having three cores, the winding portion of a... | 02/16/1988 |
| 4630013 | Current controlled variable inductor An inductor is configured so as to wind a control coil on one of winding portions of first and second cores and to wind a tuning coil on the other winding portion to insert the second core into a hollow portion provided inside the first core, thereafter a... | 12/16/1986 |
| 4575643 | Full-wave rectifier circuit In a full-wave rectifier circuit, a sinusoidal signal is applied to a differential amplifier, first and second current mirror circuits obtain outputs from the differential amplifier which are opposite in phase to each other. Outputs of the first and secon... | 03/11/1986 |
| 4546274 | Non-linear integration circuit In a non-linear integration circuit, an audio sine wave signal is processed by a rectifier circuit and a smoothing circuit so that a DC output is obtained according to the amplitude of the signal. A hybrid diode which is similar in voltage-current charact... | 10/08/1985 |
| 4443777 | Miniature transformer A small-size transformer comprises an insulative bobbin having a pair of flanges and a hollow center portion on which an insulated tape wire is wound in layers. The center portion of the bobbin is stepped to accommodate a lead wire so that the tape wire i... | 04/17/1984 |
| 4442397 | Direct current power circuit A DC power circuit comprises a first control means which is provided between a DC power source and a pair of output terminals for controlling voltages as well as currents supplied to a load from the DC power source. An output current detector detects the ... | 04/10/1984 |
| 4430595 | Piezo-electric push button switch In a piezo-electric push button switch, a flexible printed circuit board is secured to terminals which are embedded in the housing, and the piezo-electric plate is supported by the flexible printed circuit board in such a manner that it is floated from th... | 02/07/1984 |
| 4420664 | Display type push button A display type push button having a push button body with a display window on the front end, a passage formed therein, and an elastic display plate laid in the passage in such a manner as to reciprocate along the passage to display the "on" and "off" stat... | 12/13/1983 |
