Abstract: In a lumped constant type delay line device comprising a plurality of terminals securely attached to a base plate of an insulating material, and a plurality of cores each having a coil wound thereon, an electrode is provided on the top surface of each core, and a tap of each coil is connected to the electrode.

Abstract: In a switch circuit, there are provided a signal input stage comprising an array of switches paired with pilot lamps; a storage circuit comprising I.sup.2 L elements for storing a signal derived from the signal input stage; a circuit for causing that one of the pilot lamps be lit which is associated with a predetermined one of the switches; electronic switches for controlling a signal source in response to the signal derived from the signal input stage; an auxiliary current source circuit for holding the memory at the storage circuit when the main power supply is interrupted; and a circuit adapted, when the capacity of the auxiliary current source circuit is decreased and when the main power is supplied, to turn on a predetermined one of the switches while turning off the remaining ones of the switches, thereby setting the storage circuit to a predetermined initial condition.

Abstract: In a battery charging device, terminals for supplying a charging current to a battery to be charged are provided on one side wall of the device body, and a closure member is provided to be movable like a drawer. When the closure member is drawn out, at least one opening is defined between the closure member and said one side wall so that the battery can be inserted and held therein to be charged.

Abstract: In a miniaturized electronic component device, a component body including at least one coil is entirely embedded in a protecting elastic body, with leads of the component body being led out through the protecting elastic body; the latter is coupled to a base plate; external terminals are attached to the side portions of the base plate and electrically connected to the leads of the component body; and encapsulation is provided surrounding the base plate and protecting elastic body, with the free end portion of each of the external terminals being exposed through the encapsulation.

Abstract: In a waveform shaping circuit, there are provided a first and a second monostable multivibrator comprising I.sup.2 L elements. The first and second monostable multivibrators include a first and a second capacitor, respectively. When trigger pulse is simultaneously applied to the first and second monostable multivibrators, the first capacitor of the first monostable multivibrator is charged, while the second capacitor of the second monostable multivibrator is prevented from being charged, by means of a signal resulting from the charging at the first capacitor. Upon completion of the charging at the first capacitor, the second capacitor begins to be charged. In this way, an output signal is generated which corresponds, in respect of waveform and pulse width, to a combination of the outputs of the first and second monostable multivibrators.

Abstract: In a switch device comprising a plurality of analog switches for switchingly selecting a desired signal out of a plurality of input signals, means is provided for preventing pop noise from occurring when the switching operation is performed.

Abstract: A I.sup.2 L circuit device including logical operation circuits comprising I.sup.2 L elements, wherein when main power supply is interrupted, an injector current is injected from an auxiliary current source circuit into part of the I.sup.2 L circuit device to thereby hold a logical value, so that when the main power supply is restored, the logical state having been prevailing prior to the interruption of the main power supply is restored. When applied to a drive circuit for a switch including a self-restore type contact, for example, this I.sup.2 L circuit device is operative such that the switch is set to a predetermined logical value; the logical value is stored in a storage circuit of the I.sup.

Abstract: A variable impedance circuit is disclosed which comprises a pair of diodes having their cathodes connected together, a first current source coupled to the connection between the diodes, and a second and a third current source which are connected to the anodes of the diodes respectively. The second and third current sources are controlled by means of current mirror circuits so that equal forward currents are caused to flow therefrom to the paired diodes, thus making it possible to set up a desired impedance variation range.

Abstract: A hybrid circuit device comprising a flat package incorporating an integrated circuit therein, and a delay line constituted by a plurality of coils and capacitors. The base plate having the delay line mounted on one main surface thereof is placed, at the other main surface thereof, on the flat package. Upwardly bent terminals and non-bent terminals are led out of the flat package. The upwardly bent terminals connect the integrated circuit and delay line to each other at side portions of the base plate. Furthermore, separate terminals are provided in two rows holding the flat package therebetween and connected to the non-bent terminals of the flat package. The device is encapsulated, with the free end portion of each of the separate terminals being exposed.

Abstract: In a switching regulator including a pulse-width modulator for controlling the pulse width of a base input applied to a pair of transistors which are alternately turned on and off by the base input, the pulse-width modulator is provided, by an error amplifier, with an input corresponding to the magnitude of a detected output voltage, and variations in the input applied to the pulse-width modulator for increasing the pulse-width of the aforementioned base input are moderated by means of a time-constant circuit and a circuit for causing the time-constant circuit to be charged and discharged.

Abstract: A group-arranged type unidirectional surface acoustic wave transducer, which includes, in combination, groups of interdigital electrodes wherein the center-to-center distance between the electrodes is made equal to an integral number of wavelengths plus a quarter wavelength and further groups of interdigital electrodes wherein the center-to-center distance between the electrodes is made equal to an integral number of wavelengths plus three quarter wavelengths. According to the present invention, there is also provided a unidirectional surface acoustic wave device which can be employed as a filter by changing the frequency-amplitude characteristic of the surface acoustic wave.

Abstract: In a high frequency coil device including a drum core having a lower flange and a shield casing to be securely attached thereto, lugs are provided at the lower ends of a pair of opposing side walls of the shield casing; grooves are formed in a pair of opposing side walls of the lower flange; and the lower ends of those side walls of the shield casing which are provided with the lugs are located at a higher level than the lower ends of the remaining side walls of the shield casing which are provided with no lugs. The lugs are disposed in engagement with the aforementioned grooves and bent into contact with the lower flange. The lower ends of the side walls provided with the lugs are disposed in abutment with the upper surface of the lower flange, and inner surface portions, adjacent to the lower ends, of the side walls provided with no lugs are disposed in engagement with the other opposing side walls of the lower flange.

Abstract: An external core member is mounted on a dielectric substrate. The external core member is made of a magnetic material and is formed with a through bore. A coil member is disposed on the substrate and within the through bore. An elastic material casting is formed in the through bore and about the coil member, and having a core receiving bore formed therein. The core receiving bore is arranged coaxially with the longitudinal axis of the coil member so as to extend through the coil member at its center portion. A movable core of a magnetic material is movably retained in the core receiving bore.

Abstract: A switch circuit arrangement, wherein a plurality of switch means each comprising paired display lamp and self-restore type switch contact are provided, and a control circuit is also provided in association with said switch means. By actuating any one of the switches, a display lamp paired therewith is lit, and at the same time, a control signal is derived from a detector circuit including I.sup.2 L element. The control signal thus derived is passed to a controlled device, whereby the display lamp is lit and maintained in the lit state.

Abstract: A semiconductor integrated circuit device including a power amplifier circuit which includes a first PNP transistor, first NPN transistor, second PNP transistor and second NPN transistor which are formed in a common semiconductor substrate. The first PNP transistor is formed as a vertical type one which constitutes, together with the second NPN transistor, a first inverted Darlington circuit. The first NPN transistor, together with the second PNP transistor, constitutes a second inverted Darlington circuit. A d.c. power source is supplied to the emitter of the vertical type PNP transistor, with the emitter of the first NPN transistor being grounded.

Abstract: A switching regulator is disclosed which is designed so that a negative feedback is applied to the base of a transistor constituting an oscillator adapted for chopping a DC voltage, only during a period of time which is required to effect pulse width control when the transistor is switched from conduction to non-conduction. A control circuit may also be provided which is arranged to compare the output of a current detecting circuit for detecting a current proportional to a current for driving a transformer with the output of an error voltage amplifier for amplifying an output resulting from comparison of a rectified version of the AC output of the transformer with a reference voltage. The foregoing control circuit is also arranged so that when the output of the current detecting circuit exceeds the output of the error amplifier, a trigger signal is imparted to cause the oscillator to be changed from the on state to the off state.

Abstract: A comparator receives an input voltage as well as one of two comparator levels and compares them to selectively produce one of two outputs having different values. A comparator level generator is connected to the comparator for selectively applying one of the two comparator levels to the comparator under the control of a controlling means. The controlling means is connected to both of the comparator level generator and the comparator for controlling the comparator level generator so as to change the comparator level in response to the new state of the comparator.

Abstract: A charge-balanced analog-to-digital converter including an integrator, a capacitor, two counters and a control circuit. The integrator has two input terminals which are connected to an operational amplifier through separate resistors respectively. One of the input terminals is provided, during a first cyclic period, with a lower potential version of input voltage and during a second cyclic period, with a higher potential version of the input voltage. The other input terminal is provided, during the first and second cyclic periods, alternately with a reference voltage for charging the capacitor and an earth voltage for causing the integrator to be discharged, by discriminating the output of the integrator by means of the comparator.

Abstract: A method of fabricating a zinc oxide thin film by a sputtering process, wherein a substance, such as boron, having an ion radius smaller than that of zinc is sputtered in an oxygen atmosphere. A body of zinc and a body of such a substance may be separately provided as targets of a cathode so that such separate targets may be simultaneously sputtered to thereby produce a thin film such as mentioned above. Alternatively, use may be made of a cathode provided with a zinc target having a substance buried therein which has an ion radius smaller than that of zinc.

Abstract: A surface acoustic wave device is provided which includes a phase-modulated interdigital electrode and a uniform interdigital electrode having an equal electrode finger width and spacing, and the device is arranged to avoid occurrence of deviation of the actual performance thereof from the designed one. To this end, the electrode finger width and spacing of the uniform interdigital electrode are determined such that the ratio of metal surface to unmetallized substrate area in the phase-modulated interdigital electrode becomes equal to the ratio of metal surface to unmetallized substrate area in the uniform inter-digital electrode.