Denso Corporation

Nippon Soken, Inc.

Nippondenso Co., Ltd.

Takahisa Koyasu

Mitsuhiro Saitou

Youichirou Suzuki

Noboru Maeda

Shigeki Takahashi

Hiroyuki Ban

Kazuyoshi Nagase

Tomohisa Kishigami

Koji Kondo

Hirokazu Kasuya

Kouji Numazaki

Tadatoshi Asada

Takashi Nagasaka

Masakiyo Horie

Harumi Horihata

Kazuhisa Ikeda

Yasuhiro Fukagawa

Kengo Oka

Koji Numazaki

Yuji Otani

Yasuyuki Maeda

Kyoko Nagaoka

A signal output circuit includes an inverting amplifier circuit, a feedback capacitor and a low pass filter. The inverting amplifier circuit includes an input terminal and an output terminal. The inverting amplifier circuit executes an inverting amplification based on an input signal to output a signal to the output terminal at a pull-up state. An output stage of the inverting amplifier circuit is an open collector or an open drain. The feedback capacitor is connected between the input terminal and the output terminal of the inverting amplifier circuit. The low pass filter has an input and an output. The input of the low pass filter is connected to the output terminal of the inverting amplifier. The output of the low pass filter is connected to the feedback capacitor.

Signal output circuit

A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting line.

Rotary electric machine for a vehicle

A drive control device includes: an input unit of a command; and a control unit setting a period for rising a current in an inductive load to first and third periods in first and second commands, and setting a period for falling the current to second and fourth periods in the first and second commands, respectively. When the first command is changed to the second command, and at least one middle PMW pulse is disposed between a forward PWM pulse corresponding to the first command and an after PWM pulse corresponding to the second command, the control unit sets fifth and sixth periods in the middle PWM pulse corresponding to the first and second periods of the forward PWM pulse to a length between the first and second periods in the forward PWM pulse and the third and fourth periods in the after PWM pulse, respectively.

Drive control device

A communication circuit apparatus includes: multiple level shift circuits, each of which receives an input signal corresponding to a respective communication bus; an activation comparator for generating an activation signal when the input signal is input into one of the level shift circuits, and a level of the input signal exceeds a predetermined threshold; multiple input current voltage conversion circuits, each of which is arranged together with a respective level shift circuit, converts the input signal to a voltage signal, and outputs the voltage signal as an identification signal; and an identification circuit for identifying one of the communication busses based on the identification signal, which is output from one of the input current voltage conversion circuits. The one of the communication busses corresponds to the one of the level shift circuits, in which the input signal is input.

Communication circuit apparatus and transceiver having the same

When a transmission signal is detected as having been changed from a high level to a low level, two transmission lines are connected for only a predetermined time through a diode by a first transistor and a second transistor. The diode is arranged such that its forward direction is from a high-side transmission line to a low-side transmission line. The diode turns on, when a potential of the high-side transmission line becomes higher than that of the low-side transmission line by ringing and a potential difference therebetween exceeds a forward drop voltage of the diode. As a result, a peak wave level of a positive side in the ringing is limited to the forward drop voltage of the diode.

Differential communication device

A MOSFET at an input side controls the operation of a current mirror circuit in accordance with a level change of a PWM signal applied to its gate. When the current mirror circuit operates, a current generated by a current source flows as a mirror current so that a current flows to discharge electricity charged in a capacitance between a gate and a source through a gate of a MOSFET at an output side. When the current mirror circuit stops its operation, a current flowing from the current mirror circuit through the current source is supplied to the gate of the MOSFET at the output side.

In a transmission device for differential communication, a first cathode-side element part is coupled between a first communication line and a cathode-side power supply line, a second cathode-side element part is coupled between a second communication line and the cathode-side power supply line, a first anode-side element part is coupled between the first communication line and an anode-side power supply line, and a second anode-side element part is coupled between the second communication line and the anode-side power supply line. A driving portion drives the element parts based on transmission data input from an outside. A target potential generating portion generates target potentials of the element parts based on potentials of the first communication line and the second communication line.

Transmission device for differential communication

A signal receiver includes: a receiving circuit that receives a differential signal via a transmission line, which includes a pair of signal wires for transmitting the differential signal; and an impedance control circuit that controls an input impedance so as to reduce a common mode noise. The impedance control circuit includes a detection element for detecting at least one of a voltage, a current and an electric power of the common mode noise. The impedance control circuit controls the input impedance in accordance with change of the at least one of the voltages the current and the electric power of the common mode noise.

Signal receiver for receiving differential signal via transmission line

A receiving device is provided capable of avoiding reception of unnecessary energy when a signal waveform actually changes on a receiving side. An impedance control circuit includes a sensing unit to sense one or more of a voltage, current, or power of a signal to be received by a receiving circuit. The impedance control unit varies an input impedance according to the change in the sensed one or more quantities so that the received signal will be reflected. Thus the excess energy of the signal is reflected and fed to any other receiving circuit achieving stable communications.

Receiving device for adjusting energy of a received signal sent over a transmission line

A transmission apparatus for differential communication includes a driver bridge circuit and a pair of noise protection circuits. The driver bridge circuit includes four output devices that are independently connected between each of a pair of transmission lines and a power line or a ground line. Each noise protection circuit is provided to a corresponding transmission lines. Each noise protection circuit includes a ground potential detector and an impedance controller. The ground potential detector detects a potential of the corresponding transmission line with respect to the ground line. The impedance controller causes an impedance of the corresponding transmission line with respect to the ground line to become equal to an impedance of the other transmission line with respect to the ground line, when the detected potential becomes outside a predetermined potential range.

Transmission apparatus for differential communication

A serial communication transceiver includes a trapezoidal wave signal generation circuit for producing a trapezoidal wave signal responsive to a control signal. The trapezoidal wave signal generation circuit decreases harmonic components in the trapezoidal wave signal and suppresses superimposed noise. The serial communication transceiver also includes a driver circuit for delivering the trapezoidal wave signal to a communication line and a receiver circuit for receiving the trapezoidal wave signal over the communication line. The receiver circuit includes a filter circuit that has a filtering time at the rise of a logically bi-leveled signal substantially equal to a filtering time at the fall of the logically bi-leveled signal.

Integrated circuit for transceiver device with means for suppressing superimposed noise and for generating a more accurate output signal

In a comparator, diodes are disposed between differential pair transistors and current mirror pair transistors forming active loads. The diodes may be disposed between the differential pair transistors and the current mirror pair transistors or between the current mirror pair transistors and a ground line. In addition, diodes are disposed between signal input transistors and the ground line and between the differential pair transistors and the signal input transistors, respectively.

Differential amplifier circuit

In a constant voltage generating circuit and a reference voltage generating circuit, a band-gap circuit operates by using, not a power source voltage, but a constant voltage generated in a constant voltage circuit as a power supply voltage. The constant voltage circuit is equipped with a constant voltage circuit having transistors connected in series and a capacitor, and a transistor is equipped between a constant current circuit and the constant voltage circuit. Furthermore, transistors are added to prevent an early effect of the transistors in the constant current circuit.

Constant voltage generating circuit and reference voltage generating circuit

A supply current is supplied to an error detection circuit for detecting an error condition of an IC of the power supply circuit such as an overheat detection circuit only when the detection current of the power transistor of the power supply circuit is higher than a reference. Moreover, a supply current to the constant current source is supplied only when the detection current of the power transistor is higher than the reference to suppress the power consumption. Thus, suppression of the power consumption in the battery backup operation for a RAM during ignition off condition is provided. The current detection of the power transistor of the power supply circuit is detected with a series resistor or a multi-collector transistor.

Power supply circuit with adaptive error detection and an electronic control circuit including the same

An operational amplifier charges a charge storage capacitor in response to an input signal supplied to a non-inverting input terminal. When a switching signal is low, NPN transistors disposed in an output open circuit are on. Therefore, output transistors disposed in a push-pull circuit are off and the output signal is cut off. Further, in this situation, the potential of a phase compensation capacitor is held because AC coupling of the phase compensation capacitor does not occur.

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Chita, Japan

Takahisa Koyasu