Abstract: According to one embodiment, a semiconductor storage device includes a housing, a plurality of circuit boards, and a partition wall. The circuit boards are stacked, spaced apart from one another, and mounted with semiconductor devices including a plurality of nonvolatile semiconductor memories. The partition wall is located between the circuit boards.

Abstract: A flexible printed wiring board extends from a carriage block to an opening of an enclosure base. The flexible printed wiring board has lower and upper pieces. A connector on the lower surface of the lower piece is received in the opening. The upper piece has the lower surface opposed to the upper surface of the lower piece. A movable piece of the flexible printed wiring board has one end connected to the upper piece. The movable piece has the other end attached to the carriage block. A first aperture in the lower piece has a first diameter. A second aperture in the upper piece at a position corresponding to a position of the first aperture has a second diameter smaller than the first diameter. A screw is screwed into the enclosure base through the first aperture and the second aperture.

Abstract: A disk drive has: a disc-shape information recording medium; a swing arm having a base and a pair of arm sections extended along the surface and backside of the information recording medium; and two opposed connecting boards attached to the arm sections and each having an arm-side conductor pattern. The disk drive further has a circuit board with a signal-processing circuit processing a signal; and a relay board relaying the signal between the circuit board and the swing arm and having one end fixed to the circuit board and the other end provided with a fixed section fixed to the swing arm. The fixed section has a connection piece provided on a leading-end side of the fixed section, sandwiched between the connecting boards in a direction intersecting the connecting boards, and having a circuit-side conductor pattern connected to the arm-side conductor pattern at an edge contacting the connecting board.

Abstract: A storage apparatus includes an enclosure that has an opening in a bottom, and a carriage block. A flexible printed board has an upper part and a lower part, and a connector attached on an opposed surface of the lower part to a bottom plate of the enclosure inserted through the opening. A connector packing is fixed around the connector, with a catching part that stretches toward the flexible printed board. The flexible printed board has a first opening formed in the lower part, into which the catching part of the connector packing is infixed and a second opening formed in the upper part, into which the catching part of the connector packing fixed into the first opening is further fixed with the upper part folded on the lower part.

Abstract: A battery pack is detachably provided for a drive main body. When carrying, an interface card and a connector cable are detachably supported and fixed to the drive main body by a holder member, thereby packaging. A power source is supplied from an upper apparatus to a control IC circuit unit of a device via the interface card. Only when both of the power supply from the upper apparatus and the power supply from an external power source unit are detected, the power source from the external power source unit is supplied to a device circuit unit, thereby making the device circuit unit operative.

Abstract: A case construction of a memory apparatus using a portable recording medium is improved so as to render the memory apparatus compact in size and to improve an assembling property. The memory apparatus using the portable recording medium comprises an upper outer case, a lower outer case, a drive device for driving the recording medium, an inner bottom case fitted onto the lower outer case, a top cover for covering the upper part of the inner bottom case, a power source unit disposed in the inner bottom case, and a holder for fitting the drive device to the inner bottom case. A separator interposed as a safety component between the power source unit and the drive device is defined by extending upward the wall surface of the holder on the side of the power source unit.

Abstract: A battery pack is detachably provided for a drive main body. When carrying, an interface card and a connector cable are detachably supported and fixed to the drive main body by a holder member, thereby packaging. A power source is supplied from an upper apparatus to a control IC circuit unit of a device via the interface card. Only when both of the power supply from the upper apparatus and the power supply from an external power source unit are detected, the power source from the external power source unit is supplied to a device circuit unit, thereby making the device circuit unit operative.

Abstract: A battery pack is detachably provided for a drive main body. When carrying, an interface card and a connector cable are detachably supported and fixed to the drive main body by a holder member, thereby packaging. A power source is supplied from an upper apparatus to a control IC circuit unit of a device via the interface card. Only when both of the power supply from the upper apparatus and the power supply from an external power source unit are detected, the power source from the external power source unit is supplied to a device circuit unit, thereby making the device circuit unit operative.

Abstract: In a gain-variable amplifier including a dual differential amplifier circuit for amplifying an input voltage to generate an output voltage with a gain in accordance with first and second control voltages, and a control voltage generating circuit, for generating the first and second control voltages in accordance with a gain control voltage, a polarity of a difference between the first and second control voltages is unchanged, when the gain control voltage is within a control range.

Abstract: The invention provides a quadrature demodulator which removes unnecessary higher harmonic signals included in a demodulation output without giving rise to increase in number of externally connected parts and increase in current consumption. The quadrature demodulator includes a first double differential circuit to which a modulated signal and a first local signal are inputted, a first emitter follower circuit for effecting impedance conversion, a second double differential circuit to which the modulated signal and a second local signal having a phase shifted by 90-degrees from the first local signal are inputted, and a second emitter follower circuit connected to a pair of outputs of the second double differential circuit for effecting impedance conversion.

Abstract: An amplifier circuit equipped with a negative feedback loop includes a differential amplifier circuit composed of a plurality of differential amplifier stages, first and second negative feedback circuits each including a low-pass filter and being provided between an associated one of an in-phase output and an opposite-phase output and an associated one of first and second inputs of the differential amplifier circuit. This amplifier circuit further includes a suppression circuit to suppress an a.c. component of a signal to be fed back by adding signals relative to the in-phase and opposite phase outputs.

Abstract: A stereo demodulation device includes an audio signal processing circuit, a muting circuit, a muting switch, and a variable resistor. At least a given signal processing function of the audio signal processing circuit is adjusted by supplying a control current from a control terminal thereof. The muting circuit outputs or blocks an audio signal processed by the audio signal processing circuit. A muting switch is commonly connected to a control terminal of the muting circuit and the control terminal for the given signal processing function of the audio signal processing circuit. The variable resistor adjusts the control current.