摘要:
According to this invention, a level converter has a pair of differential transistors operated at a negative voltage in accordance with an ECL-level input signal, and first and second output nodes are arranged between a collector of one transistor of the pair of differential transistors and a positive power source voltage. A level-converting resistor for converting an ECL-level signal to a positive level signal is inserted between the first output node and the second output node so as to output the positive level signal in accordance with an ECL-level input signal to the first output node. The emitter-collector path of a bipolar transistor is inserted between the second output node and the positive power source voltage. A clamp potential for controlling saturation of transistors constituting a TTL circuit connected to an output of the transistor is generated by a constant potential applied to the base of the transistor.
摘要:
A circuit board (10, 10″, 10′″) comprising: a board core (11) having a main core surface (12) and a rear core surface (13); a ceramic capacitor (101, 101′, 101″, 101′″, 101″″, 101″″′, 101″″″) having a main capacitor surface (102) and a rear capacitor surface (103), having a structure in which a first inner electrode layer (141) and a second inner electrode layer (142) are alternately stacked with a ceramic dielectric layer (105) interposed therebetween, and having a plurality of capacitor function units (107, 108) being electrically independent from each other, the ceramic capacitor (101, 101′, 101″, 101′″, 101″″, 101″″′, 101″″″) being buried in the board core (11) in a state where the main core surface (12) and the main capacitor surface (102) are directed in a same direction; and a buildup layer (31) having a structure in which an interlayer insulating layer (33, 35) and a conductor layer (42) are alternately stacked on the main core surface (12) and the main capacitor surface (102) and having a semiconductor integrated circuit device mounting region (23, 51, 52) for mounting a semiconductor integrated circuit device (21, 53, 54) having a plurality of processor cores (24, 25) on a surface (39) of the buildup layer (31), wherein the plurality of capacitor function units (107, 108) are capable of being electrically connected to the plurality of processor cores (24, 25), respectively.
摘要:
A wiring board comprising: a plate core having a first main surface and a second main surface; conductor layers including a conductor line; dielectric layers laminated alternately with said conductor layers on at least one of said first and second main surfaces; via conductors as defined herein; a signal through-hole as defined herein; a signal through-hole conductor as defined herein; a first path end pad as defined herein; a second path end pad as defined herein; a shield through-hole as defined herein; and a shield through-hole conductor as defined herein; wherein: a signal transmission path is formed as defined herein; at least one of said conductor layers is disposed on each of said first and second main surface sides; said surface conductor on said first main surface side and said conductor line form a strip line, a microstrip line, or a coplanar waveguide with constant characteristic impedance Z0; an inner surface of said shield through-hole is covered with said shield through-hole conductor; and an interaxis distance between said signal through-hole conductor and said shield through-hole conductor is adjusted as defined herein.
摘要:
An engine operated generator is provided with an engine, a generator driven by the engine, and a power control unit for controlling the power generated by the generator. A fuel gas stored in fuel bottles set in a case for the engine operated generator, is supplied to the engine though a fuel pressure regulator. The fuel bottles and the fuel pressure regulator are disposed adjacent to the power control unit to enable heat exchange with the power control unit provided with an inverter. Thus, heat is mutually utilized between the power control unit and at least one of the fuel bottles as fuel receptacles and the fuel pressure regulator.
摘要:
An intermediate substrate is provided which reduces the effect of the difference in the coefficients of linear expansion between the terminals of the substrate and those of a semiconductor integrated circuit device, and which thus lowers the likelihood of disconnection due to thermal stress. The intermediate substrate, which is a planar member made of a polymeric material, includes a substrate core including a main core body having formed therein a sub-core compartment, and a ceramic sub-core section accommodated in the compartment. A first terminal array on the first principal surface side includes two types of terminals, functioning either as power source terminals or ground terminals, and a signal terminal. The array occupies an area entirely included within an orthogonally projected region of the sub-core section projected onto a reference plane parallel to the planar surface of the substrate core.
摘要:
An intermediate substrate includes a substrate core formed by a main core body portion constructed of a sheet of polymer material and having a subsidiary core accommodation portion formed therein. A ceramic subsidiary core portion, which is constructed of a ceramic sheet, is accommodated in the subsidiary core accommodation portion and is of a thickness matching that of the main core body portion. A thin film capacitor is formed on a first main surface side of a plate-like base of the core portion and includes first and second thin film electrodes separated from each other by a thin film dielectric layer so as to provide direct current isolation between the electrodes. First and second direct current isolated terminals of a first terminal array are electrically connected to the first and second thin film electrodes.
摘要:
This invention discloses a constant voltage circuit including a bandgap circuit connected between a ground voltage and a source voltage, a transistor, the collector of which is connected to the collector of a negative feedback transistor for supplying a voltage of a base-emitter path to the other terminal of a resistor having one terminal connected to an output terminal of the bandgap circuit, and the base of which is connected to a voltage source free from variations in source voltage, and a resistor connected between the emitter of the transistor and the source voltage.
摘要:
An attenuator circuit is provided which comprises an input node, a first resistor connected at one terminal to a reference potential, a second resistor connected to the other terminal of the first resistor, a first output node which is a connection node of the first resistor and the second resistor, a third resistor connected in parallel with the series circuit of the first and second resistors and being of such a type that a resultant resistive value of the first, second and third resistors is equal to a resistive value of the first resistor, a fourth resistor connected at one terminal to a connection node of the second and third resistors and having a resistive value substantially equal to that of the second resistor, and at least one combination resistor of a ladder configuration connected between the other terminal of the fourth resistor and the input node and having a third output node as a junction of its series circuit portion.
摘要:
To provide a high-speed wide-dynamic range differential amplifier, the amplifier comprises first and second FETs having source terminals connected to each other and a constant current source connected between the sources and ground; third and fourth bipolar transistors complementary to the first and second FETs, having base terminals connected to a first bias voltage in common and emitter terminals connected to the drains of the first and second FETs and a supply voltage via resistors, respectively; and a current mirror circuit composed of fifth and sixth FETs of the same conductive type as the first and second FETs.
摘要:
A Booth's algorithm conversion circuit having first and second switches controlled by input signals QX and Q2X and receiving as input, signals X.sub.i of a logic level positioned in the i digit order of a multiplicand X and signal X.sub.i-1 of a logic level positioned in the i-1 digit order of multiplicand X. The outputs of the first and second switches are tied together and to ground via first and second transitors controlled by signals QX and Q2X, the first and second transistors conducting in an inverse relationship to the first and second switch circuits. The common output of the first and second switch circuits is input to an exclusive OR circuit which receives an additional logic 1 or logic 0 input signal to produce the Booth's converted output. The resulting number of circuit elements and gates provides a simplified, high speed and small circuit for producing the Booth's conversion.