Abstract: The present invention provides a power supply circuit including a control circuit, a battery and two switches. When an electrical apparatus having the power supply circuit of the present invention is in a power saving mode, the control circuit receives a control signal and then sends respectively two signals to the switches. Therefore, the battery directly supplies a DC signal as a power resource to reduce power consumption.

Abstract: A grid-linked power supply is described. An inverter, at least one distributed energy source to meet normal, non-peak power demand, a connection to a public utility grid to meet peak power demand requirements, and a converter for regulating delivery of power from the distributed energy source or the public utility grid are connected by bus lines. A topology for the grid-linked power supply has an inverter and a DC/DC converter that is connected to the distributed energy source. The inverter and converter are connected by bus lines, and a bias voltage is provided to select drawing power from the distributed energy source or the public utility grid.

Abstract: The positive potential side output of a voltage source (1) is connected to the positive potential side of a first circuit (10) through a terminal (6); the ground (negative potential) side output of voltage source (1) is connected through a terminal (8) to the ground (negative potential) side of first circuit (10). Also, the positive potential side output of voltage source (1) is lowered by a prescribed voltage .DELTA. V by a Schottky barrier diode (2) and is connected to the positive potential side of second circuit (11) through a terminal (7); the ground (negative potential) side output of voltage source (1) is raised by a prescribed voltage .DELTA. V by a Schottky barrier diode (4) and is connected to the ground (negative potential) side of second circuit (11) through a terminal (9). A power supply voltage supplying circuit can thereby be provided wherein latch-up is avoided while still keeping current consumption and electromagnetic interference (EMI) low.

Abstract: In a power supply apparatus including a plurality of batteries and a plurality of power supply portions for connecting to loads, a plurality of switches connect these batteries to these power supply portions, respectively. The apparatus further includes a control mechanism which controls the opening and closing operations of the switches. When one of the switches is turned on in one of the power supply means, the control mechanism executes the control in such a manner that the other switches are turned off. The control mechanism further controls each of the switches on the basis of the remaining capacity of each battery and the load state of each power supply portion. Accordingly, the power supply operation can be flexibly carried out.

Abstract: Electrical equipment such as a personal computer includes a plurality of internal components which require different voltages including low voltages of about five volts for operation. The different voltages are supplied by an internal power supply, with a voltage regulator, which is itself connected to an appropriately transformed high voltage supply typically from an in-the-wall source. Peripherals such as a FAX/modem, CD ROM, or tape recorder are powered by special connectors in the face of the computer housing and connected to the appropriate outputs of the internal power supply to obtain low voltage power directly from the host computer in the absence of a transformed connection to a house supply.

Abstract: The present invention provides a low cost, low complexity, redundant power supply for an electronic data system. The low complexity of the system minimizes system failure rate while the redundancy improves system availability. The redundant power supply interconnect system is comprised of: a first electronic device including a first power supply; a second electronic device including a control means, a second power supply and a third power supply, wherein the first power supply means of the first electronic device is electrically coupled to the control means of the second electronic device; a first dedicated bus electrically coupling the first electronic device to the second electronic device; and a first serial management bus, the first serial management bus electrically coupling the first electronic device to the control means of the second electronic device.

Abstract: An analog-to-digital converter comprises the following elements. A reference voltage generation circuit is provided for dividing a reference voltage into a plurality of divided reference voltages having voltage levels different from each other. A plurality of comparators are provided, each of which has a first input terminal connected to an analog input line for fetching analog signals and a second input terminal connected to the reference voltage generation circuit for fetching a corresponding one of the divided reference voltages so as to compare the analog signals with the divided reference voltage. Each of the comparators has an output terminal through which an output digital signal is outputted.

Abstract: A fault tolerant isolation system providing fault tolerant electrical isolation between different components receiving power from separate power sources regardless of which of the power sources fails. One power source provides operating voltage to an isolation device, which is a transceiver, buffer, quick switch, etc. The other power source activates a transistor switch coupled to the output enable input of the isolation device, and a current limit device is provided between the output enable and power inputs of the isolation device. In this manner, failure of either power source disables the isolation device and therefore provides fault tolerant isolation between the devices on either side. In the preferred embodiment, the isolation device acts as a high impedance open switch if its power is removed thereby isolating the devices on either side.

Abstract: A secondary power system eliminates the need for an automatic transfer switch and permits simultaneous supply from different sources. Primary power is rectified and connected to a DC bus, an AC generator has its output rectified and connected to the DC bus, and a storage battery is also connected to the DC bus. Current on the DC bus is inverted to AC to provide an uninterrupted power supply. The system is connected to a household electrical system by a power distribution panel which can be installed in a home prior to the secondary power system and can facilitate installation of the secondary system. The distribution panel can selectively bypass the secondary system and can disconnect non-vital loads when primary power is not available. The generator is powered by an engine using gasoline, natural gas or water, which can also power other systems, such as air conditioning, with exhaust heat or rotary motion.

Abstract: A semiconductor integrated circuit is operative in a plurality of different modes. A plurality of select signals whose number corresponds to modes selected from a plurality of different modes are outputted. In response to the select signals, it is detected whether at least two operation modes are selected simultaneously. If so, a detection signal is outputted. In response to this detection signal, the operation of the semiconductor integrated circuit is stopped. Further, in response to the select signal, the semiconductor integrated circuit is activated in a mode by means of a predetermined select signal of these select signals. Further, in response to these select signals, the selected mode can be detected.

Abstract: An input module used in a factory automation apparatus, which is constituted by a bidirectional conduction circuit for connecting to an AC power source or DC power source with both plus or minus common line, a constant current circuit for supplying constant current, and a load circuit accepting the constant current. When the voltage range is less wide, a bidirectional conduction circuit and a filter circuit are used.

Abstract: An IC card has its internal load divided into a plurality of load circuits through which substantially equal currents flow. A power supply switching circuit is provided for each of the load circuits. The switching circuits switch the power supply for the IC card between an internal power supply and an external power supply to avoid excessive voltage losses when the current for the internal load flows through a single switching circuit.

Abstract: Circuitry including a first and second source of electrical energy provides a continuous supply of electrical energy to a volatile memory circuit utilized within an electrical apparatus. The circuitry includes an on and off switch and allows for the first source of electrical energy to be supplied to the volatile memory when the switch is both in an on and off position. The secondary source of electrical energy is only used to supply electrical energy to the volatile memory when the first souce of electrical energy is either inoperative or disconnected from the circuit. Such circuitry allows for conservation of power of the second source of electrical energy which in some electronic apparatus may include a lithium battery that may be relatively difficult to replace.

Abstract: A hand-held labeler, particularly a labeler employing a thermographic print head, utilizes improved control circuitry for accurately sensing the position of the web and controlling the operation of the print head in order accurately to control the position of the imprints on the web. When a motor is used to advance the web, the control system is operative to control the operation and speed of the web advancing motor.

Abstract: A stabilized DC power outputs supply devices for providing a plurality of DC power outputs which are selectively consumed, is provided by use of a single power control circuit. A plurality of DC power outputs are taken out from the single power control circuit through rectifier circuits and low-pass filter circuits. A voltage of each of the DC power outputs is sensed by a corresponding voltage sensing circuit and is compared with a corresponding reference voltage at a corresponding voltage comparing circuit. Detecting circuits for detecting one of the DC power outputs which is being consumed are provided to apply to a control signal generator the output of one of the comparing circuits which is corresponding to the DC power output detected by the detecting circuits. The control signal generator provides a control signal to the single power control circuit to stabilize the voltage of the DC output which is being consumed.