Sharp Kabushiki Kaisha Corporation

Osaka University

Seiichiro Kihara

Akio Nakajima

Zenpei Tani

Katsuaki Suganuma

Kiyoshi Kumata

Kazuhito Nagura

Hiroya Sato

Mitsuru Hosoki

Jinting Jiu

Tomotoshi Satoh

Mitsuo Kobachi

Hajime Kashida

Kiyoshi Ebina

Shijo Nagao

Nobumasa Ono

Naonori Okabayashi

Aiji Suetake

Atsushi Murayama

Hisao Nagao

Masahiro Morita

Yukihisa Oda

Hirohumi Sindo

Shunichi Utsumi

A composite semiconductor device with improved response performance and reliability is provided while an increase in wiring area being suppressed. Fingersare arranged in a plurality of rows and a plurality of columns. A signal inputted via a gate terminal () is supplied from intermediate regions in a row-wise direction of gate wires () connected to gate electrodes (G) of the same row or two adjacent rows of fingersof the fingersand formed along the rows.

Composite semiconductor device

Provided is an electrode like a protruding electrode that is self-standing on a substrate. A conductive paste () contains a conductive powder, an alcoholic liquid component, and no adhesives. The conductive powder contains conductive particles having a thickness of 0.05 &#x3bc;m or more and 0.1 &#x3bc;m or less and a representative length of 5 &#x3bc;m or more and 10 &#x3bc;m or less, the representative length being a maximum diameter in a plane perpendicular to the direction of the thickness. The weight percentage of the alcoholic liquid component relative to the conductive paste is 8% or more and 20% or less.

Conductive paste having dilatancy, electrode connection structure including the paste, and method for producing the structure

A driver circuit includes normally-on transistors (Q, Q), control circuits () that control the transistors (Q, Q), a capacitor () connected between power source nodes () of the control circuit (), a power source () connected between power source nodes () of the control circuit (), a MOSFET () connected between the power source nodes (), a control circuit () that turns on the MOSFET () when an output voltage VO reaches approximately 0 V, and a startup circuit that includes a Zener diode () connected in parallel to the capacitor () and that can charge the capacitor () with a Zener voltage even when the MOSFET () is off.

Driver circuit

A driver circuit includes normally-on first and second transistors, a first control circuit for controlling the first transistor in response to a first control signal, a second control circuit for controlling the second transistor in response to a second control signal, a capacitor connected between first and second power supply nodes of the first control circuit, a power supply connected between third and fourth power supply nodes of the second control circuit, a switch element connected between first and fourth power supply nodes, and a third control circuit for turning the switch element on when an output voltage becomes about 0V.

Provided is a high-reliability level shift circuit not prone to faulty operation due to noise. A level shift circuitis provided with: first and second current control elementsandinto control terminals of which a reverse-phase input signal and an in-phase input signal are input, respectively; first and second load circuitsandwhich are connected at one end to a high-side power source terminal Vb and at the other end to each of first terminals of the first and second current control elementsand; a comparatorin which a pair of differential input terminals Np and Nn are connected separately to each of the first terminals of the first and second current control elementsand; a current generating circuitin which first and second current output terminals Na and Nb are connected to second terminals of the first and second current control elementsand, and which separately generates a current which flows through the respective first and second current control elementsand; and voltage suppressing circuitsandwhich are connected separately or commonly to the first and second current output terminals Na and Nb, respectively, and suppress voltage from rising in the first and second current output terminals Na and Nb, respectively.

Level shift circuit

The present invention provides a safe circuit that can prevent an arm short, when a half-bridge circuit is configured by using a normally-on switching element, and the half-bridge circuit is used as a driver circuit or an inverter circuit. In a driver circuit configured by a half-bridge circuit in which one of input and output terminals of a first switching elementis connected to a first power-supply voltage Von a high-voltage side, and the first switching elementand a second switching elementare connected in series, a normally-off third switching elementis inserted between the second switching elementand a second power-supply voltage Von a low voltage side. The third switching elementis turned off, when an operating voltage VH or VL supplied from control-circuit power suppliesandis insufficient for the operation of a control circuit

Driver circuit and inverter circuit

The present invention provides a level shift circuit having low possibility of malfunction by noise, and can operate with low power. A level shift circuitincludes first and second MOSFETsandusing signals with phases same as and opposite to the phase of an input signal Sin as gate inputs, first and second resistance elementsand, each having one end connected to a shift level power terminal that supplies high-level output voltage of a level-shifted output signal, and each having the other end connected to a corresponding drain of the first and second MOSFETs, a comparatorhaving a pair of differential input terminals, which are individually connected to respective drains of the first and second MOSFETs, and a current control circuitthat controls an amount of first current flowing through the first MOSFET via the first resistance element and an amount of second current flowing through the second MOSFET via the second resistance element in synchronization with a rising and a falling of a signal level of the input signal.

A gate driver circuit that can supply a negative gate voltage to a high-side circuit without being additionally provided with an insulated power supply is realized. A driver circuit is configured such that a half-bridge circuit in which a first transistor and a second transistor are connected in series includes a capacitor that supplies a negative gate voltage to a high-side first transistor via a first control circuit, and a control circuit power supply that supplies a negative gate voltage to a low-side second transistor via a second control circuit, one end of the capacitor being connected to a negative voltage VEE on a negative terminal side of the control circuit power supply via a switching element, and the other end being connected to a voltage on an output terminal, wherein the switching element is controlled to be on upon a timing when the second transistor is turned on.

An optoelectronic device for sensing an object without any contact, the optoelectronic device being adapted to be connected to a control device which is capable of sending an identification code to the optoelectronic device, the optoelectronic device includes an optoelectronic element (110, 111) for receiving an input signal and for converting the received signal into an electrical signal, an address memory (121) for storing a self identification code, a determining unit (126) connected to the address memory (121) for determining a coincidence between the self identification code stored in the address memory (121) and the identification code sent from the control device, and an activating unit (127) connected to the determining unit (126) for driving the optoelectronic element (110, 111) at a time when the self identification code coincides with the identification code.

Optoelectronic device, information apparatus and data transmission

A novel comparator circuit is disclosed, in which a pulse output is obtained from the output terminal of a differential amplifier through a transistor by applying a threshold voltage to either input terminal of a differential amplifier composed of a pair of transistors and then comparing an input voltage applied to the other input terminal therewith, wherein the aforementioned pair of transistors of the differential amplifier are each composed of two transistors connected in a complex manner, the input voltage is directly inputted, without the use of a buffer or the like, by raising the input impedance of the comparator circuit to thereby simplify the circuit as a whole and to widen its scope of application. Further, the output terminal of the differential amplifier connected to a transistor in an output circuit of the comparator circuit and a power source are connected through a resistor so as to ensure against occurrence of impulses in the output pulses through prevention of operation of the output circuit alone before changing of the threshold voltage for causing a hysteresis property to be imparted to the comparator circuit.

Comparator circuit

A waveform converting apparatus includes a first and a second common-emitter type transistors as part of a first and second emitter follower circuits respectively. The follower circuits are used for converting the impedances of an input signal independently. A first constant current supply is connected to the emitter of the first transistor provided in the first emitter follower circuit, and a second constant current supply is connected to the emitter of the second transistor provided in the second emitter follower circuit. The constant current flowing in the first emitter follower circuit is adjusted to be of a smaller value than the constant current flowing in the second emitter follower circuit. With this difference in current value there is a difference between the base-emitter voltage of the first transistor in the first emitter follower circuit and the base-emitter voltage of the second transistor in the second emitter follower circuit on the basis of the ratio of the first and second constant currents mentioned above. Also with the above described difference in currents a ceramic chip capacitor can be used in an integrating circuit of the converting apparatus.

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Osaka, Japan

Seiichiro Kihara