Abstract: A schedule adjustment apparatus includes a storage portion, an acquisition portion, and an adjustment portion. The storage portion stores a schedule for giving an instruction to perform maintenance of the image forming apparatus. The acquisition portion acquires, from the image forming apparatus, state information indicating a state of an image formed on a sheet by the image forming apparatus. The adjustment portion adjusts the schedule based on the state information.

Abstract: A schedule adjustment apparatus includes a storage portion, an acquisition portion, and an adjustment portion. The storage portion stores a schedule for giving an instruction to perform maintenance of the image forming apparatus. The acquisition portion acquires, from the image forming apparatus, state information indicating a state of an image formed on a sheet by the image forming apparatus. The adjustment portion adjusts the schedule based on the state information.

Abstract: A comparator circuit includes a differential input circuit, a load circuit, a first current source, a first bias voltage supplying circuit, a third connection circuit, and a fourth connection circuit. The differential input circuit includes a first transistor to which a first input signal is supplied and a second transistor to which a second input signal is supplied. The load circuit includes a third transistor connected to the first transistor through a first connection circuit and a fourth transistor connected to the second transistor through a second connection circuit, gates of the third and fourth transistors being connected to the first connection circuit through a third capacitor. The first bias voltage supplying circuit supplies a first bias voltage to the gates of the third and fourth transistors and the third capacitor.

Abstract: An image forming system includes a plurality of processing apparatuses. An image forming apparatus includes an image forming section, storage, an acquiring section, a first specifying section, a receiver, a second specifying section, and a notifying section. The storage stores therein a position of each of the processing apparatuses. The acquiring section acquires state information from each of the processing apparatuses. The state information indicates whether a corresponding one of the processing apparatuses is in a normal function state or a malfunction state. The first specifying section specifies, from among the processing apparatuses, a malfunctioning processing apparatus for which the malfunction state is indicated by the state information. The second specifying section specifies a relative position of the malfunctioning processing apparatus with respect to a mobile terminal device.

Abstract: A comparator circuit includes a differential input circuit, a load circuit, a first current source, a first bias voltage supplying circuit, a third connection circuit, and a fourth connection circuit. The differential input circuit includes a first transistor to which a first input signal is supplied and a second transistor to which a second input signal is supplied. The load circuit includes a third transistor connected to the first transistor through a first connection circuit and a fourth transistor connected to the second transistor through a second connection circuit, gates of the third and fourth transistors being connected to the first connection circuit through a third capacitor. The first bias voltage supplying circuit supplies a first bias voltage to the gates of the third and fourth transistors and the third capacitor.

Abstract: An image forming system includes a plurality of processing apparatuses. An image forming apparatus includes an image forming section, storage, an acquiring section, a first specifying section, a receiver, a second specifying section, and a notifying section. The storage stores therein a position of each of the processing apparatuses. The acquiring section acquires state information from each of the processing apparatuses. The state information indicates whether a corresponding one of the processing apparatuses is in a normal function state or a malfunction state. The first specifying section specifies, from among the processing apparatuses, a malfunctioning processing apparatus for which the malfunction state is indicated by the state information. The second specifying section specifies a relative position of the malfunctioning processing apparatus with respect to a mobile terminal device.

Abstract: An image reading device includes a first image reading portion, a cooling portion, a second image reading portion, and a notification processing portion. The first image reading portion reads an image of a document sheet at a first reading position. The cooling portion cools the document sheet at a cooling position downstream in a feeding direction of the document sheet with respect to the first reading position. The second image reading portion reads an image of the document sheet at a second reading position downstream in the feeding direction with respect to the cooling position. In a case where a difference image different from a first image read by the first image reading portion, the difference image being included in a second image read by the second image reading portion has been detected, the notification processing portion provides a notification that the difference image has been detected.

Abstract: An impedance measuring circuit has an amplification circuit connected to a target and to amplify a predetermined input signal with a gain corresponding to an impedance in the target and to output an output signal, a peak hold circuit to hold a peak value of the output signal and to output a hold value, and an impedance calculation circuit to calculate the impedance in the target based on the hold value.

Abstract: An image reading device includes a first image reading portion, a cooling portion, a second image reading portion, and a notification processing portion. The first image reading portion reads an image of a document sheet at a first reading position. The cooling portion cools the document sheet at a cooling position downstream in a feeding direction of the document sheet with respect to the first reading position. The second image reading portion reads an image of the document sheet at a second reading position downstream in the feeding direction with respect to the cooling position. In a case where a difference image different from a first image read by the first image reading portion, the difference image being included in a second image read by the second image reading portion has been detected, the notification processing portion provides a notification that the difference image has been detected.

Abstract: According to an embodiment, a transmission circuit is configured to transmit a signal to a reception circuit through a transmitting AC coupling element. The transmitting AC coupling element is AC coupled to a receiving AC coupling element. The transmission circuit includes a drive signal generation circuit and a drive circuit. The drive signal generation circuit is configured to generate a drive signal in synchronization with a transmission signal to be transmitted. The drive circuit is configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance. The drive circuit is configured to apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period.

Abstract: An impedance measuring circuit has an amplification circuit connected to a target and to amplify a predetermined input signal with a gain corresponding to an impedance in the target and to output an output signal, a peak hold circuit to hold a peak value of the output signal and to output a hold value, and an impedance calculation circuit to calculate the impedance in the target based on the hold value.

Abstract: A device includes an operational-amplifier including an amplifier-part amplifying signals and transmitting amplified signals to a first and a second nodes, and an output-part connected to the first and second nodes and outputting signals from a first and a second outputs. The device includes a first and a second chopper switches and a first and second phase-compensation capacity elements. A first capacitance switch switches between a first connection-state and a second connection-state. In the first connection-state, the first phase-compensation-capacity element is connected between the first node and the first output and the second phase-compensation-capacity element is connected between the second node and the second-output. In the second connection state, the first phase-compensation-capacity element is connected between the second-node and the second output and the second phase-compensation-capacity element is connected between the first node and the first output.

Abstract: A device includes an operational-amplifier including an amplifier-part amplifying signals and transmitting amplified signals to a first and a second nodes, and an output-part connected to the first and second nodes and outputting signals from a first and a second outputs. The device includes a first and a second chopper switches and a first and second phase-compensation capacity elements. A first capacitance switch switches between a first connection-state and a second connection-state. In the first connection-state, the first phase-compensation-capacity element is connected between the first node and the first output and the second phase-compensation-capacity element is connected between the second node and the second-output. In the second connection state, the first phase-compensation-capacity element is connected between the second-node and the second output and the second phase-compensation-capacity element is connected between the first node and the first output.

Abstract: According to an embodiment, a transmission circuit is configured to transmit a signal to a reception circuit through a transmitting AC coupling element. The transmitting AC coupling element is AC coupled to a receiving AC coupling element. The transmission circuit includes a drive signal generation circuit and a drive circuit. The drive signal generation circuit is configured to generate a drive signal in synchronization with a transmission signal to be transmitted. The drive circuit is configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance. The drive circuit is configured to apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period.

Abstract: According to one embodiment, an amplification circuit includes first and second differential amplification circuits, each having an output connected to an output terminal and a feedback resistor connected between the output and a negative input of the respective differential amplification circuit. The amplification circuit includes a switching circuit that receives a first signal on first input terminal and a second signal on a second input terminal and includes set of switches that is configured to apply the first and second signals to the first and second differential amplification circuits such that in a first switching state an amplified voltage difference of the first and second signals is available between the two output terminals, and in a second switching state an amplified current difference of the first and second signals is available between the two output terminals.

Abstract: According to one embodiment, there are provided a bias voltage generation circuit that generates a bias voltage in an operational amplifier according to a bias current generated inside, and an adaptive timing control circuit that temporarily increases the bias current at a timing at which a first control signal configured to control an input signal of the operational amplifier changes in level.

Abstract: According to one embodiment, an amplification circuit includes first and second differential amplification circuits, each having an output connected to an output terminal and a feedback resistor connected between the output and a negative input of the respective differential amplification circuit. The amplification circuit includes a switching circuit that receives a first signal on first input terminal and a second signal on a second input terminal and includes set of switches that is configured to apply the first and second signals to the first and second differential amplification circuits such that in a first switching state an amplified voltage difference of the first and second signals is available between the two output terminals, and in a second switching state an amplified current difference of the first and second signals is available between the two output terminals.

Abstract: An echo cancellation circuit in a full duplex two-way communication system comprising: an input/output terminal; a subtractor having a positive and a negative input terminals, in which a first transmission signal is inputted to the negative input terminal as a pseudo echo signal, the first transmission signal is inputted through an output buffer to the positive input terminal as an echo signal, the pseudo echo signal inputted to the negative input terminal is subtracted from the echo signal inputted to the positive input terminal; and a result of the subtraction is outputted; and an echo cancellation error reducing unit having a D/A converter at an input side or an output side of the subtractor.

Abstract: An echo cancellation circuit in a full duplex two-way communication system comprising: an input/output terminal; a subtractor having a positive and a negative input terminals, in which a first transmission signal is inputted to the negative input terminal as a pseudo echo signal, the first transmission signal is inputted through an output buffer to the positive input terminal as an echo signal, the pseudo echo signal inputted to the negative input terminal is subtracted from the echo signal inputted to the positive input terminal; and a result of the subtraction is outputted; and an echo cancellation error reducing unit having a D/A converter at an input side or an output side of the subtractor.