Abstract: A method for forming pin-form wires or bumps on, for instance, an electrode pad of an electronic circuit element, in which a ball is formed on a tip end of a wire that passes through a capillary, the wire is then extended from the lower end of the capillary, a notch is formed in the portion of the wire between the ball and the capillary by a cutter, the ball is bonded to the electrode pad using the capillary, and the capillary is raised, thus pulling the wire and cutting the wire at the notch to form a pin-form wire or bump on the electrode pad.

Abstract: A display control circuit (100) that may have a reduced power consumption has been disclosed. A display control (100) may include a plurality of output cells (3-1 to 3-N). Each output cell may include an amplifying circuit (35) for driving an output terminal (PS) to essentially a gray level voltage according to a display data (DIN). Amplifying circuit (35) may include a dead zone in which an output may be a high impedance when the output terminal is substantially the gray level voltage. An amplifying circuit (21) may be included to provide a drive for the output terminal (PS) in the vicinity of the gray level voltage. Amplifying circuit (21) may not include the dead zone. In this way, by providing the large drive by amplifying circuit (35) and a smaller drive strength by amplifying circuit (21), current consumption may be reduced.

Abstract: An LCD control unit includes a software adjustment block for adjusting the &ggr;-correction voltages by a software. The LCD control unit includes a voltage generator block generating n &ggr;-correction voltages and m Vcom voltages based on a voltage address signal, a voltage selecting block selecting a pair of &ggr;-correction voltages and a Vcom voltage based on a time series polarity control signal, and an LCD driver having a &ggr;-correction resistor string which receives the &ggr;-correction voltages at both the ends thereof. The LCD driver converts external data signals into display voltages having voltages corrected by the outputs from the &ggr;-correction resistor string.

Abstract: An operation amplifier 1 for driving an liquid crystal panel is constructed of: differential stage circuits 2, 3, drive stage circuits 4, 5, output transistors 11 to 14, switching means for switching the connections of the differential stage circuits 2, 3 and the drive stage circuits 4, 5, and a middle-potential side power source 10. These differential stage circuits 2, 3 and drive stage circuits 4, 5 are operated between the high-potential side power source 8 and the low-potential side power source 9. The output transistors 11, 12 are operated between the high-potential side power source 8 and the middle-power side power source 10, and also the output transistors 13, 14 are operated between the middle-potential side power source 10 and the low-potential side power source 9, which are alternately driven by the drive stage circuits 4, 5, respectively.

Abstract: An operation amplifier 1 for driving an liquid crystal panel is constructed of: differential stage circuits 2, 3, drive stage circuits 4, 5, output transistors 11 to 14, switching means for switching the connections of the differential stage circuits 2, 3 and the drive stage circuits 4, 5, and a middle-potential side power source 10. These differential stage circuits 2, 3 and drive stage circuits 4, 5 are operated between the high-potential side power source 8 and the low-potential side power source 9. The output transistors 11, 12 are operated between the high-potential side power source 8 and the middle-power side power source 10, and also the output transistors 13, 14 are operated between the middle-potential side power source 10 and the low-potential side power source 9, which are alternately driven by the drive stage circuits 4, 5, respectively.

Abstract: The present invention provides a liquid crystal panel driving circuit including an operational amplifier and a flexible substrate. The operational amplifier outputs an output signal based on an image signal and a feedback signal corresponding to the output signal without a high frequency content. In the flexible substrate with an inductance, the output signal passes through to a liquid crystal display via the inductance. The operational amplifier may include an operational amplifier element and a negative feedback circuit. The operational amplifier element includes a non-inverting input terminal supplied with the image signal, an inverting input terminal supplied with the feedback signal and an output terminal outputting the output signal. The negative feedback circuit formed between the output terminal and the inverting input terminal.

Abstract: A liquid crystal drive circuit for AC-driving a liquid crystal panel, the liquid crystal drive circuit being constituted of a switched capacitor type D/A converter having a sample period and a hold period, the liquid crystal drive circuit comprising a differential operational amplifier 204, a first reference voltage input terminal 200 connected to one input terminal of the differential operational amplifier, a first capacitor group 205 connected to the other input terminal of the differential operational amplifier, for dividing second and third reference voltages 201 and 202, a second capacitor group 206 connected between an output terminal and the other input terminal of the differential operational amplifier, and switch means 207 to 218 for changing a connection condition of the first capacitor group and the second capacitor group to the differential operational amplifier, the switch means being on-off controlled at every predetermined periods for changing the connection condition, so that a color unevennes

Abstract: An operational amplifier comprising output stages K2 and K3 for outputting an output signal So in response to an input signal Si, wherein; said output stages perform a push-pull operation respectively in response to a plurality of specific signals generated on the basis of said input signal and have a plurality of output stage transistors M65 and M66 for generating said output signal as a result of said push-pull operation, and said plurality of specific signals are generated as signals being substantially equal to each other in delay time until they are inputted respectively into said plurality of output stage transistors.

Abstract: A method for forming pin-form wires or bumps on, for instance, an electrode pad of an electronic circuit element, in which a ball is formed on a tip end of a wire that passes through a capillary, the wire is then extended from the lower end of the capillary, a notch is formed in the portion of the wire between the ball and the capillary by a cutter, the ball is bonded to the electrode pad using the capillary, and the capillary is raised, thus pulling the wire and cutting the wire at the notch to form a pin-form wire or bump on the electrode pad.

Abstract: An image signal control circuit including a digital-to-analog conversion circuit with a first reference voltage terminal to be supplied with a predetermined voltage value, and second and third reference voltage terminals to be supplied with gradation voltage values The digital-to-analog conversion circuit also has a switching unit for outputting one value of gradated analog gradation data obtained by the division of the gradation voltage, a control circuit for selectively operating the switching unit based on digital image data, sample hold input clock and frame input clock, so as to switch the polarity of an output signal of the digital-to-analog conversion circuit at every frame period.

Abstract: An operational amplifier having an input stage including a differential transistor pair and an output stage receiving an output of the input stage for outputting an output signal having a wide output range. The input stage includes a field effect transistor connected in parallel to a constant current source for the differential transistor pair and having a gate connected to receive a level-shifted signal of an output of the input stage, so that when the output signal of the output stage changes, the field effect transistor is turned on so as to supplying an additional bias current to the differential transistor pair in addition to a bias current supplied by the constant current source, so that the slew rate of the output signal of the output stage is elevated.

Abstract: A digital-to-analog converter has a single capacitor array having plural weighted capacitors, a first capacitor connected between an output node of an operational amplifier and an inverted input node of the operational amplifier and a second capacitor both connected to the inverted input node, and a pulse signal, a polarity control signal maintained in one of the high level and the low level over each pulse period of the pulse signal and a multi-bit digital signal are supplied to a controller; the controller causes a switching unit to selectively supply a first reference voltage and a second reference voltage to the weighted capacitors depending upon the logic level of the data bits of the digital signal and, thereafter, a third reference voltage to the weighted capacitors in a certain pulse period, and the switching unit carries out the switching action in the opposite order to the previous pulse period so that the operational amplifier varies an analog output signal with respect to a potential level supplie

Abstract: In a tool storage device for a machine tool, a tilting mechanism is provided with a positioning member fixed in a magazine base, a turning member turnably mounted to the outer periphery of the positioning member. The center of turning of a tool pot is kept at a specified position by the positioning member so that the tool pot is integrally turned with the turning member by turning the turning member by a link rod to a tool storage state or to a tool exchange state. The center of turning of the tool pot agrees with that of the turning member, so that a friction force is not produced therebetween. The link rod is driven hydraulically by a cylinder which is locked to maintains the final position of the tool pot when the fluid supply to the cylinder is stopped. The tool pot is restricted from dropping from the transfer mechanism.

Abstract: A tool changer for a machine tool includes an arm support disposed between a spindle head and a tool magazine to be reciprocally moved along the spindle relative to the spindle, a pair of tool changing arms mounted for rocking motion on support shafts further mounted on the arm support to cross the spindle, respectively, holding mechanisms on one ends of the tool changing arms respectively, and a rotating mechanism for rotating the tool changing arms by 180 degrees about a center shaft parallel with the spindle. Each holding mechanism has a moving pin and a spring for urging the moving pin in a direction of projection of the pin. The moving pins are engaged with a tool attached to the spindle and another tool located at a standby position of the tool magazine when the tool changing arms are rocked about the support shafts so that the tools are detachably held by the holding mechanisms respectively.

Abstract: An amplification circuit is composed of a differential operational amplifier internally containing a current source circuit and having an inverted input connected to an output thereof through a parallel circuit composed of a first switch and a first capacitor. The inverted input is connected to one end of a second capacitor having the other end connected to a signal input terminal through a second switch. A non-inverted input of the differential operational amplifier is connected to a first reference voltage, and the other end of second capacitor is connected through a third switch to a second reference voltage.

Abstract: An operational amplifier comprises an input stage, an output stage, and an intermediate circuitry connected between the input stage and the output stage. The operational amplifier may be biased between a high voltage line and a low voltage line. The input stage includes at least an amplifier circuit. The intermediate circuitry comprises at least a first pair of a first transistor and a first constant current source, both of which are connected in series to each other between the high voltage line and the low voltage line. The first pair may be adjacent to the output stage. A first intermediate point between the first transistor and the first constant current source may be connected to the output stage. At least a second pair of a second transistor and a second constant current source is provided, both of which are connected in series to each other between the high voltage line and the low voltage line. The second pair may be in parallel to the first pair and may be adjacent to the input stage.

Abstract: An input stage, an error compensable level-shift stage and an output stage form in combination an operational amplifier circuit, and the error compensating level-shift stage includes an inverting transistor coupled to an input node of a current mirror circuit and responsive to an output potential level of the input stage for controlling an output potential level of the current mirror circuit and a constant current source coupled to the output node of the current mirror circuit so as to eliminate influence of unitentional variation of the channel doping level of the inverting transistor from the output potential level at the output node.

Abstract: A machine tool has a spindle with a splayed taper at the tool-holding tip, the taper expanding outwards in the direction away from the supporting bearings. Due to centrifugal forces, any cutting fluid (scattered by cutting operations) that reaches the surface of the taper tends to move on the surface of the taper and scatter away from the bearing, avoiding the intrusion of cutting fluid into the bearing. A flange having an internal taper matching the splayed taper of the tool-holding tip can be provided around the tip, making it more difficult for cutting fluid to reach the clearance between the tapers and further encouraging any intruding fluid to move and scatter away from the bearing.

Abstract: A tape recorder has an operating mode in which a magnetic tape is run at a speed higher than an ordinary reproducing speed, a magnetic head is in sliding contact with the magnetic tape, and a desired tape position is searched. In this operating mode, the magnetic tape is run initially at a first speed higher than the ordinary reproducing speed, for example triple that speed, for a predetermined period of time after an operating switch that sets the operating mode is turned on. Then, if the operating switch remains continuously turned on after the elapse of this predetermined period of time, the magnetic tape is run at a second speed which is higher than the first speed, for example 16 times the ordinary reproducing speed. In this manner, the tape speed is automatically switched from a high-speed and therefore efficient search mode in which a selected section of the tape is searched to a still higher speed in which the tape is rapidly advanced to a different section of the tape.

Abstract: A coating material for optical glass fibers is disclosed. The material is comprised of 1,4-polybutadienes having functional groups or modified polybutadienes derived from the 1,4-polybutadienes having introduced therein polymerizable double bonds different from the double bonds present in the 1,4-polybutadienes.