摘要:
A voltage detector 22 has an input port IN connectable to a steering remote control 6 of a voltage dividing type adapted to output one of output voltages different from each other for each of key switches to be pressed by a user, and detects through the input port IN an output voltage output from the steering remote control 6. A pull-up resistor 21a is connected in series between the input port IN and a power supply Vdd supplying a voltage to the steering remote control 6, and has a variable resistance. A controller 23 controls the pull-up resistor 21a to have sequentially changed resistances in a course of pressing the key switches. A processor 3 operates on sets of output voltages given respectively for the resistances in the course of pressing the key switches, to select a resistance of the pull-up resistor.
摘要:
In accordance with various aspects of the present invention, a method and circuit for reducing power consumption of a wall plate system during idle conditions is provided. In an exemplary embodiment, a wall plate system is configured for reducing power during idle mode by disengaging at least one outlet from a power input. A wall plate system may include one or more outlets and one or more wall plate circuits, with power input connected to the outlets through the wall plate circuit(s). The wall plate circuit may include, a current measuring system, a control circuit, and a switch. The current measuring system provides, through the switch, an output power signal that is proportional to the load at the outlet. If behavior of the current measuring system indicates that an outlet is drawing substantially no power from the power input, the switch disengages the power input from the outlet.
摘要:
A voltage supply interface provides both coarse and fine current control with reduced series resistance. The voltage supply interface has a segmented switch having N component switches that are digitally controlled. The voltage supply interface replaces a conventional sense resistor with a calibration circuit that has a replica switch that is a replica of the N component switches. The calibration circuit includes a reference current IREF that is sourced through the replica switch. A voltage comparator forces a common voltage drop across the replica switch and the n-of-N activated component switches so that the cumulative current draw through the segmented switch is n·IREF. The current control of the voltage interface can be coarsely tuned by activating or deactivating component switches, and can be finely tuned by adjusting the reference current. The current sense resistor is eliminated so that the overall series resistance is lower.
摘要:
A system includes a first module, a second module, and a third module. The first module determines a first temperature and a first power dissipation value of a thermistor based on a resistance of a first resistor connected in series with the thermistor. The second module, after disconnecting the first resistor and connecting a second resistor in series with the thermistor, determines a second temperature and a second power dissipation value of the thermistor based on a resistance of the second resistor. The third module determines a thermal dissipation factor based on the first and second temperatures and the first and second power dissipation values, and corrects temperature sensed by the thermistor based on the thermal dissipation factor.
摘要:
The present invention relates to a control method for a soft switch circuit in a switch power supply, which controls first and second main power switch devices to be turned on and turned off constantly to generate an alternating main power filter current, and controls forward and backward auxiliary switch devices to be turned on and turned off to generate an intermittent alternating resonant current across a resonant branch in the same direction as the main power filter current to thereby achieve zero-voltage turn-on of the first and second main power switch devices; and further controls the forward and backward auxiliary switch devices to be turned on and turned off to generate compensation currents across the resonant branch in the opposite direction to the alternating main power filter current in at least a period of time during resting of the resonant current to thereby accomplish a charging and discharging process of resonant capacitors in a dead time. Thus, a freewheeling diode can be turned on normally, so that it is possible to avoid a damage to the devices due to an impact current and a spark voltage resulting at zero crossing of the current in the soft switch circuit.
摘要:
Disclosed are an apparatus, a system and a method for reducing standby power of an electronic appliance, and an apparatus for reducing standby power of an electrical outlet. The apparatus for reducing the standby power of the electronic appliance includes: a starting switch connected to an external power source for providing power from the external power source to the electronic appliance through a first channel, operating the electronic appliance by providing an operation signal for operating the electronic appliance to the electronic appliance, and disconnecting the external power source connected through the first channel; and a power hold switch device connected to the electronic appliance through a second channel, the power hold switch device providing power from the external power source to the electronic appliance through the second channel when receiving a power hold control signal provided by the operating electronic appliance, and disconnecting power provided by the external power source through the second channel when receiving no power hold control signal. As a result, with only one switch operation, the electronic appliance is connected to a power source, and operates at the same time. When a computer (i.e. the electronic appliance) changes from an operating state to a standby state, the power is automatically disconnected from the computer, so that the computer changes to a non-power consuming state. Accordingly, the standby power of the computer is cut by minimizing the standby state thereof, so that it can be minimized.
摘要:
A switchable integrated electronic device includes at least three elements r1 . . . r14, s1 . . . s14 series coupled in a chain between a first port and a second port and includes a node between successive elements r1 . . . r14, s1 . . . s14 of the chain. There is a switch means for coupling a selectable one of the nodes to a third port. If successive elements r1 . . . r14, s1 . . . s14 in the chain are denoted ri, i=1 to N, and if adjacent positions occupied by the elements are numbered consecutively 1 to N, then element ri occupies position ⌊ N + 1 2 ⌋ + ( - 1 ) i · 2 · ⌊ i 2 ⌋ for i = 1 to ⌊ N 2 ⌋ and position ⌊ N + 1 2 ⌋ + ( - 1 ) i · ( 2 · ⌊ N - i 2 ⌋ + 1 ) for i = ⌊ N 2 ⌋ + 1 to N .
摘要:
A system comprising an antenna, an antenna matching network, an amplifier of a radio frequency (RF) module, a matching circuit, and a switch. The switch is configured to selectively connect said amplifier to test apparatus via said matching circuit when in a first position, and to said antenna via said antenna matching network when it is in a second position.
摘要:
A communication system in which an operating voltage can be selected from a plurality of interface voltages enables an interface voltage to be switched in a stable manner during operation of the system. When the interface voltage is to be switched, a host device (1) and a slave device (2) perform the switching while maintaining the signal level of buses in a stable manner. This structure enables the communication system to switch an interface voltage using a small number of signal lines.
摘要:
The invention relates to a switchgear cabinet or rack comprising a mounting unit, the front of which has vertical mounting profiles that laterally delimit an installation space for installed user-side units, said profiles having fixing sections for attaching mounting sections of the installed units, and comprising components of a detection device for determining the presence of an installed unit in an installation position of the installation space. he components of the detection device have a vertical detector strip that is attached to a mounting profile and contains detector elements associated with the installed positions and arranged on or in said strip and code carriers that are provided on the installed units, the information from said carriers being transmitted for evaluation via the detector elements to a monitoring and control unit, either wirelessly or by wire. Clearly-represented user information is achieved for the switchgear cabinet using light elements mounted on or in the detector strip, said elements being associated with the installation positions and achieved by the fact that the light elements can be controlled in accordance with the information in the code carriers.