摘要:
A power supply circuit includes a switching element provided with a control terminal for changing between an ON state and an OFF state, and an LC resonant circuit connected to the switching element and has a predetermined resonant frequency. A resistor connects to the control terminal of the switching element, and a feedback winding applies a feedback voltage derived from a high frequency signal across the LC resonant circuit to the control terminal through the resistor. A bias circuit connected to the feedback winding provides a bias voltage superimposed with the feedback voltage to the control terminal through the feedback winding and the resistor for alternately switching between the ON and Off states. The feedback voltage is delayed by a time defined by the resistor before being applied to the control terminal of the switching element.
摘要:
An inverter power supply having a DC source, a transformer having a primary winding, a secondary winding, and a feedback winding, an L-C resonant circuit of a capacitor and the primary winding, and a self-excited oscillator. The oscillator includes an L-C resonant circuit and an FET connected in series with the primary winding across the DC source to generate a high frequency voltage across the primary winding, a feedback voltage across the feedback winding and a resulting output AC voltage across the secondary winding. A biasing capacitor is connected in parallel with a series combination of the L-C resonant circuit and the FET across the DC source to be charged thereby. The biasing capacitor is also connected in series with the feedback winding to provide an offset voltage which is additive to the feedback winding to give a bias voltage applied to a gate of the FET so as to alternately turn on and off the FET for driving the self-excited oscillator. A current sensor is provided to sense a current flowing through FET and gives a first level signal indicative of the sensed current being fed to the resonant circuit. Extending across the biasing capacitor is a single discharge path which does not go through the FET. A switching transistor is inserted in the single discharge path and is caused to turn on, upon the first level signal exceeding a threshold level, to discharge the biasing capacitor to a level for maintaining the offset voltage at a constant level during continued oscillation of the L-C resonant circuit.
摘要:
A liquid crystal display device having a liquid crystal panel LCP and a touch panel TP provided on the front surface of the liquid crystal panel is characterized in that wires connected to the liquid crystal panel and wires connected to the touch panel are included in one flexible printed circuit FPC, which is first connected (FOG1) to the liquid crystal panel (specifically, a TFT substrate (TFTS)) and then connected (FOG2) to the touch panel.
摘要:
A mobile telephone is provided that includes a plurality of circuit blocks and adapted to cut off the supply of power source voltage to any one of the circuit blocks. The mobile telephone also includes an interblock interface circuit provided on a signal path between an elected circuit block and a branch point at which the signal path branches into different branch paths so as to connect to other circuit blocks. The interblock interface circuit includes a signal gate for preventing signal transmission from the elected circuit block to the other circuit blocks, and includes a storage unit for storing a signal right before the power cut-off.
摘要:
A display device of the invention includes a display panel attached to one face side of a light transmissive circuit board and a light transmissive substrate attached to the other face side of the circuit board. A mounted component is mounted on the other face side of the circuit board. The circuit board includes a light transmissive junction layer for joining the circuit board to the light transmissive substrate at a position avoiding the mounted component. The junction layer includes a core substrate formed of a resin, an adhesive layer formed on one face of the core substrate, and a bonding layer formed on the other face of the core substrate and cured. The adhesive layer is adhered to the circuit board, and the bonding layer is firmly fixed to the light transmissive substrate.
摘要:
A magnetic head assembly is provided. The magnetic head assembly includes a slider in which a head element is mounted. A flexure supports the slider. The flexure includes a pair of outriggers, a connection portion, and a tongue portion. A flexible wiring substrate is fixedly bonded to the surface of the flexure. An electrode pad of the slider and an electrode pad of the flexible wiring substrate are bonded to each other by solder. A plurality of solder bonded portions are arranged on the connection portion. A deformable portion is formed in the pair of outriggers and located on an extended line on which the solder bonded portions are arranged, so that the free end side of the flexure is deformable.
摘要:
A charged particle beam apparatus includes: a charged particle source which generates a charged particle beam to apply to a specimen having a microstructure formed on a surface thereof; an objective lens which excites at least one of an electric field and a magnetic field to converge the charged particle beam onto the specimen; a deflector which scans the specimen with the charged particle beam; a detector which detects at least one of a secondary charged particle, a reflection charged particle and a back scattering charged particle generated from the specimen and which outputs a detection signal; a focusing area arranging unit which arranges a plurality of focusing areas including edge points of the microstructure therein in a surface area of the specimen; a deflection controller which controls the deflector so that the focusing areas are sequentially scanned to correspond to excitation conditions while changing stepwise the excitation conditions of the objective lens; a focus calculator which calculates an index indicating a convergence state in each excitation condition on the basis of the detection signal and which calculates an optimum excitation condition providing an optimum focal position from the index; and an objective lens controller which drives the objective lens under the optimum excitation condition.
摘要:
A semiconductor integrated circuit is provided including a plurality of circuit blocks and adapted to cut off the supply of power source voltage to any one of the circuit blocks. The integrated circuit includes an interblock interface circuit provided on a signal path between an elected circuit block and a branch point at which the signal path branches into different branch paths so as to connect to other circuit blocks. The interblock interface circuit includes a signal gate for preventing signal transmission from the elected circuit block to the other circuit blocks, and includes a storage unit for storing a signal right before the power cut-off.
摘要:
A DC adapter that can be housed in a battery housing portion of an electronic apparatus selectively with a primary and secondary battery. The DC adapter is connected to an AC/DC converter and is inserted into a battery housing portion of an electronic apparatus so as to supply the electronic apparatus with a DC power, wherein a substantially cylindrical adapter main body has an insertion limiting portion which is guided by an insertion guide portion of the battery housing portion when the DC adapter is inserted into the battery housing portion with the proper polarity, and comes into contact with the contact portion of the battery housing portion when the DC adapter is inserted into the battery housing portion with the reversed polarity so as to limit the insertion of the DC adapter. The insertion limiting portion is formed by projecting a part of the outer circumference of the cylindrical adapter main body in a rectangular manner along the longitudinal direction of the main body and has two sides each of which extends from a part of the outer circumference of the DC adapter. The center angle of the circular arc obtained by connecting the proximal ends of the two sides on the outer circumference of the DC adapter is less than 90°.
摘要:
A charged particle beam irradiation method includes: obtaining shape information of an edge of a pattern to be inspected that is formed on a subject; creating a first line group substantially perpendicular to the pattern edge; creating a second line group substantially parallel with the pattern edge; specifying areas defined by the first line group and the second line group as a lattice group including irradiation positions of a charged particle beam; deciding an order to irradiate the areas with the charged particle beam so that the lattice group is sequentially scanned in a direction of the first or second line group; and scanning the subject with the charged particle beam in accordance with the irradiation order.