Abstract:
To provide a communication apparatus over a public switched telephone network free from malfunction due to a flow of a DTMF noise signal caused by said apparatus into a detector for detecting a DTMF signal transmitted from another apparatus. A DTMF noise signal detector for detecting a DTMF noise signal caused by said apparatus is provided in addition to a DTMF signal detector for detecting a DTMF signal transmitted from another apparatus to distinguish the DTMF noise signal caused by said apparatus from the DTMF signal transmitted from another apparatus.
Abstract:
To provide a communication apparatus over a public switched telephone network free from malfunction due to a flow of a DTMF noise signal caused by said apparatus into a detector for detecting a DTMF signal transmitted from another apparatus. A DTMF noise signal detector for detecting a DTMF noise signal caused by said apparatus is provided in addition to a DTMF signal detector for detecting a DTMF signal transmitted from another apparatus to distinguish the DTMF noise signal caused by said apparatus from the DTMF signal transmitted from another apparatus.
Abstract:
PROBLEM TO BE SOLVED: To fully enhance performance of an entire system even during a peak shift period. SOLUTION: The invention includes a system body equipped with a function to drive with reduced system performance; an AC adapter 51 which is constituted connectable to the system body and supplies power to the system body from a commercial power supply; and a battery 52 which is constituted connectable to the system body, discharges after charge, and supplies the system body with power. In a state that both the AC adapter 51 and the battery 52 are connected to the system body, during a period for restricting power supply from the AC adapter 51, the system is driven without deteriorating the performance of the system even in the state that power supply from the AC adapter 51 is turned off and the power is being supplied from the battery 52. Then, even during this period, the power supply from the AC adapter 51 is turned on and the power is supplied to the system body by the AC adapter 51. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To reduce power loss by reducing the operating frequency of a power supply unit on standby, for example, in soft-off or suspended state or when a line has not been connected. SOLUTION: An AC adaptor 10 is installed so that the adaptor is connectable to equipment main body through a power line, and is provided with a rectification bridge diode 11 for rectifying inputted alternating-current voltage; a capacitor 12 for smoothing the voltage; a switching transistor 13 that performs switching of the rectified and smoothed voltage; and a pulse width modulation IC 15 that provides an operating frequency for the performed switching. The pulse width modulation IC 15 provides a first operating frequency to the switching transistor 13 when the equipment main body performs normal operation, and a second operating frequency lower than the first operating frequency to the switching transistor 13 when the power line between the adaptor and the equipment main body is disconnected or when the equipment main body is in a specified standby state.
Abstract:
PROBLEM TO BE SOLVED: To provide a charge control method which can perform efficient charge in the case where the charge is stopped halfway, and a computer where that charge control method is applied. SOLUTION: The charge of the main battery is started, and at the point of time when the capacity of the main battery reaches a specified value, the charge of the main battery is stopped (steps 200-204). Then, the charge of the second battery is started, and at the point of time when the capacity of the second battery reaches a specified value, the charge of the second battery is stopped (steps 206-210). Then, the charge of the main battery is restarted, and at the point of time when the capacity of the main battery becomes 100%, the charge of the main battery is stopped, and then the charge of the second battery is restarted, and at the point of time when the capacity of the second battery becomes 100%, the charge of the second battery is stopped (steps 212-222).
Abstract:
PROBLEM TO BE SOLVED: To easily detect that an AC adaptor with a capacity lower than that of a normal adaptor is connected to a system. SOLUTION: Electric equipment is provided with: a system main body comprising the AC adaptor 51 which converts an alternate current into a direct current and can be connected thereto with the system main body being supplied with electric power from the AC adaptor 51; and an intelligent battery 52 which receives power from the AC adaptor 51 to be charged and discharges so as to supply the main body with power. Concerning the intelligent battery 52, if a charging current which is supplied from the AC adaptor 51 and is measured with a current measuring circuit 63 is lower than a prescribed value to be an index of charging completion and if the voltage of a cell 61 which is measured with a voltage measuring circuit 64 and a calculated integrated capacity are less than respective prescribed values which permit judgment that a sufficient charged capacity is attained, a CPU 62 outputs information that the AC adaptor 51 is inappropriate to an embedded controller 14 on the system main body side. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To guide a user in refreshment of a battery with proper timing, when a battery for supplying the system body with power by discharging electricity after being charged. SOLUTION: This system is equipped with a CPU which executes the diagnosis program of an intelligent battery 52, an embedded controller 41 which receives an identifier from the intelligent battery 52 and outputs it to the CPU, an information file which stores the date information of refreshment in a plurality of batteries, and an AC adaptor power stoppage circuit 80 which performs the supply and stoppage of the power to the system body from an AC adaptor 51 by the control from the embedded controller 41. The CPU acquires from the information file the date information corresponding to the identifier outputted from the embedded controller 41, and judges the necessity of the refreshment and stops the supply of power from the AC adaptor 51 to the system body by controlling the AC adaptor power stoppage circuit 80, based on the refreshment command from the CPU.
Abstract:
PROBLEM TO BE SOLVED: To precisely determine the existence of a fault in a battery, in an apparatus which is equipped with a battery for performing charge and discharge and supplying power to the main body side. SOLUTION: This is a computer device which performs power supply to the system body from a connected intelligent battery 52 for performing charge and discharge, and this intelligent battery 52 is equipped with a voltage measuring circuit 70 which measures the battery voltage, a current measuring circuit 63 which measures the charge and discharge currents, a temperature measuring circuit 90 which measures the temperature, and a CPU 62 which grasps the full charge capacity of the intelligent battery 52, based on the battery voltage obtained by the voltage measuring circuit 70, the charge and discharge currents obtained by the current measuring circuit 63, and the temperature obtained by the temperature measuring circuit 90. The CPU 62 compares the forecast lowest capacity having determined the level of the capacity to be guaranteed with the full charge capacity, and informs the embedded controller 41 of the system main body of the comparison results.
Abstract:
PROBLEM TO BE SOLVED: To significantly reduce the power loss in the power supply off or light load of an electronic apparatus having a power source part such as AC adaptor connected thereto. SOLUTION: This device comprises an AC adaptor 10 for supplying an external power to a system 30, a battery 20 to be on the basis of the power supplied from the AC adaptor 10 and also supply the charged power to the system 30 by discharging the power; and a controller 31 for controlling the supply of power from the AC adaptor 10 and battery 20 to the system 30. When the system 30 is in power supply off or light load in the state where the AC adaptor 10 is connected to the system 30, the controller 31 stops the supply of power from the AC adaptor 10 to the system 30 to supply the power from the battery 20.
Abstract:
PROBLEM TO BE SOLVED: To provide a low-cost and small-size power supply switching apparatus which can surely supply power, even when the power supply from outside is shut off and also provided a computer which avoids shutdown caused by shutting-off of the power from the outside. SOLUTION: The power supply switching apparatus comprises an AC adaptor detection circuit 110 and a temporary power supply circuit 112, which are disposed on a power supply line L, and a battery switching circuit 114. The AC adaptor detection circuit 110 detects the shut-off of the power supplied from the outside via an AC adaptor 62 and outputs the detection result as a #AC- ADAP signal. The temporary power supply circuit 112 temporarily supplies power to a DC-DC converter 66, when the power from outside is shut off. The battery switching circuit 114 switches the states of FETs 1-4, and both a main battery 64A and a secondary battery 64B are connected to the DC-DC converter 66 in linkage with a change of the #AC-ADAPT signal, when the AC adaptor 62 is disconnected.