Abstract: A path configuration for a power switch and driver can introduce independent parasitic inductance coupled to the power switch to slow a switching speed of the switch and reduce voltage spikes on the switch during switching events. The path for low side supply of the drive to the negative DC voltage reference is separate from the path of the power switch to the reference. The resulting reduction in voltage spikes due to the slowed switching time maintains performance in an audio amplifier without modifying a switch command signal to compensate for voltage spikes. The path configuration avoids reliance on specifying higher rated components that increase application costs.

Abstract: An amplifier includes a differential stage including a differential pair of transistors of a first conductivity type, the differential pair having gates, first and second inputs to the amplifier respectively including the gates of the differential pair; a current sum branch coupled to the differential stage, the current sum branch including a variable current source and being configured to sum current from the variable current source with current from the differential stage that flows to the current sum branch if a voltage at the first input exceeds a voltage at the second input; and an output stage coupled to the current sum branch. An imaging device and a method of manufacturing an amplifier are also provided.

Abstract: A feedback-type variable gain amplifier including a first field effect transistor, a feedback circuit, and a load circuit. The first field effect transistor receives an input voltage signal through an input node, amplifies the input voltage signal, and outputs the amplified input voltage signal through an output node. The feedback circuit is coupled between the input node and the output node, and generates feedback impedance that is changed in response to a control signal. The load circuit is coupled between the output node and a voltage source, and generates load impedance that is changed in response to the control signal to cancel a change of input impedance due to a change of the feedback impedance. Therefore, since the input impedance is not changed when the gain of the amplifier is changed, a voltage standing wave ratio is good, and a range of gain control is broad.

Abstract: An amplifier for improving an electrostatic discharge (ESD) characteristic includes an operational amplifier, a first resistor circuit, a first fuse box, a second resistor circuit, and a second fuse box. The operational amplifier includes a first input terminal receiving a first input signal, a second input terminal receiving a second input signal, and an output terminal outputting an output signal. The first resistor circuit is connected between the second input terminal and a first node to prevent ESD from being input to the second input terminal. The first fuse box is connected between the first node and the output terminal of the operational amplifier. The second resistor circuit is connected between the second input terminal and a second node to prevent ESD from being input to the second input terminal. The second fuse box is connected between the second node and a terminal for receiving a ground voltage.

Abstract: The present invention, generally speaking, provides a VCO linearization technique applicable to advanced loop architectures. In particular, the linearization technique is applicable to a mostly-digital frequency locked loop (FLL), phase locked loop (PLL) or the like using multi-point modulation. In an exemplary embodiment, a correction table is used to form a corrected control variable that affects one modulation point only (e.g., a fast modulation path) of the multi-point modulation circuit. The other modulation point (e.g., a slow modulation path) of the multi-point modulation circuit is controlled in accordance with an error-forming circuit including a loop filter. The use of correction within the fast path enables the VCO to achieve more rapid phase changes than would otherwise be possible, an advantage in high-data-rate communications applications, for example.

Abstract: A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes presented are operative to generate I and Q square waves at a designated frequency while avoiding the well known issue of harmonic pulling. The use of analog mixers of the prior art is avoided and replaced with an XOR gate configured to generate the correct average frequency. The edges are dynamically adjusted by ±T/12 or zero based on the state of the controlled oscillator down-divided clock.

Abstract: A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes presented are operative to generate I and Q square waves at a designated frequency while avoiding the well known issue of harmonic pulling. The signal is input to a synthesizer timed to a rational multiplier of the RF frequency fRF. The signal is then divided to generate a plurality of phases of the divided signal. A plurality of combination signals are generated which are then multiplied by a set of weights and summed to cancel out some undersired products. The result is filtered to generate the LO output signal.

Abstract: A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes presented are operative to generate I and Q square waves at a designated frequency while avoiding the well known issue of harmonic pulling. The input signal is fed to a synthesizer timed to a rational multiplier of the RF frequency L/N fRF. The clock signal generated is divided by a factor Q to form 2Q phases of the clock at a frequency of L(N*Q) fRF, wherein each phase undergoes division by L. The phase signals are input to a pulse generator which outputs a plurality of pulses. The pulses are input to a selector which selects which signal to output at any point in time. By controlling the selector, the output clock is generated as a TDM based signal. Any spurs are removed by an optional filter.

Abstract: Conventional oven controlled crystal oscillators have a problem that heat generated by a heat generator consisting of resistors and a transistor is not transmitted uniformly over a substrate and hence a temperature difference is produced between a temperature sensor and a crystal resonator, so that reliable temperature control cannot be performed, thereby degrading the frequency-temperature characteristics. The present invention is to provide an oven controlled crystal oscillator capable of uniformly transmitting heat from the heat generator to improve the frequency-temperature characteristics. The oven controlled crystal oscillator includes a high thermal conductivity plate having high thermal conductivity and provided on one side of a substrate, where the crystal resonator is provided, in such a manner to contact the resistors, the transistor, the crystal resonator, and the temperature sensor.

Abstract: A micropower RC oscillator comprises a current generating section including a current source that generates a current; and a variable resistor of which the magnitude is variably set and which is configured by combining resistor elements at a predetermined ratio, the resistor elements having opposite characteristics to each other with respect to a temperature change, the variable resistor adjusting the magnitude of the generated current; a start-up circuit section connected to the current generating section and fixing a bias operating point to a constant value such that the current generating section stably generates a current; a charge and discharge circuit section including a variable capacitor, of which the magnitude is variably set, and a plurality of transistors, the charge and discharge circuit section charging and discharging the variable capacitor by using the current generated from the current generating section and the plurality of transistors; an oscillation signal output section connected to the ch

Abstract: A magnetic drive and mechanical oscillator system comprising a mechanical oscillator, a coil, a means for providing alternating current to said coil thereby creating a magnetic field within and about the coil, said means including an on-off means and a ferromagnetic material in communication with the diaphragm of the mechanical oscillator and the coil.

Abstract: A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes presented are operative to generate I and Q square waves at a designated frequency while avoiding the well known issue of harmonic pulling. An input baseband signal is interpolated and upconverted in the digital domain to an IF. The LO operates at a frequency which is a n/m division of the target RF frequency fRF. The IF frequency is configured to ½ of the LO frequency. The upconverted IF signal is then converted to the analog domain via digital power amplifiers followed by voltage combiners. The output of the combiners is band pass filtered to extract the desired replica.

Abstract: The present invention relates to an impedance transformation circuit (I10; 11 a; 11 b; 12) with a first contact pad (51) and a second contact pad (52) being spaced-apart and formed on a substrate (20). The impedance transformation circuit comprises at least first circuit element (40) providing a contact area (41) formed on the substrate (20) which is arranged adjacent and between the first (51) and the second (52) contact pad. A first ‘wire element (31) extends over the substrate (20) connecting the first contact pad (51) and a first end portion (41 a) of the contact area of the first circuit element (40), whilst at least a second wire element (32) extends over the substrate (20) connecting the second contact pad (52) and a second end portion (41b) of the contact area of the first circuit element (40). The contact area of the first circuit element (40) is shaped such that it is provided a capacitive connection with a predetermined capacitance between the contact area and a fixed reference poteitial.

Abstract: Tunable impedance matching networks and tunable diplexer matching systems are provided. A tunable impedance matching network can include an impedance element connected between first and second nodes for communicating signals between the first and second nodes. For example, the impedance element can be a transmission line or an inductor. Further, the matching network can include a first capacitor connected in parallel with the impedance element, wherein the first capacitor is tunable. The matching network can also include a second capacitor comprising first and second terminals. The first terminal of the second capacitor can be connected to the first node. The second terminal of the second capacitor can be connected to a local voltage reference for the first node. A third capacitor comprises first and second terminals. The first terminal of the second capacitor can be connected to the second node. The second and third capacitors can also be tunable.

Abstract: A hybrid diplex bandstop filter includes a lowpass filter circuit which passes a first range of frequencies and a highpass filter circuit passes a third range of frequencies. The filter blocks a second range of frequencies. The third range of frequencies is higher than the second range and the first range. A tuning circuit tunes at least one re-resonance of a frequency inside the first range of frequencies to either within the second range of frequencies or outside an industry specified upper limit which is in the third range of frequencies.

Abstract: In a semiconductor device, a monitoring circuit monitors and detects a quantity of noise in the semiconductor device. A control circuit has capacitances and controls connections to the capacitances such a decoupling capacitance value provided between a first power supply and a second power supply is dynamically adjusted based on the detected noise quantity.

Abstract: A multilayer filter has a capacitor element body, at least two signal terminal electrodes, and at least one grounding terminal electrode. The capacitor element body has a plurality of laminated insulator layers, a first signal internal electrode and a grounding internal electrode arranged to be opposed to each other with at least one insulator layer out of the plurality of insulator layers in between, and a second signal internal electrode arranged to be opposed to either one internal electrode of the first signal internal electrode and the grounding internal electrode with at least one insulator layer out of the plurality of insulator layers in between. The second signal internal electrode is connected to the at least two signal terminal electrodes. The first signal internal electrode is connected through a through-hole conductor to only the second signal internal electrode. The grounding internal electrode is connected to the at least one grounding terminal electrode.

Abstract: An acoustic resonator is described, the acoustic resonator comprising a stack of a first and a second piezoelectric body, wherein said first and second piezoelectric bodies have substantially the same spatial piezoelectric orientation, an intermediate intermediate electrode being arranged between said first and said second piezoelectric body forming a first terminal of said acoustic resonator, and first and second electrodes, wherein said first electrode is arranged such that said first piezoelectric body is arranged between said first electrode and said intermediate electrode, wherein said second electrode is arranged such that said second piezoelectric body is arranged between said second electrode and said intermediate electrode, and wherein said first and said second electrode are electrically connected to each other forming a second terminal of said acoustic resonator.

Abstract: An acoustic wave device includes a first resonator having a piezoelectric substance sandwiched between a pair of electrodes in a direction of an c-axis orientation or a polarization axis, and a second resonator that is connected in series and has another piezoelectric substance sandwiched another pair of electrodes so that one of the another pair of electrodes located in the direction of the c-axis orientation or the polarization axis is at a potential equal to that of one of the pair of electrodes of the first resonator in the direction of the c-axis orientation or the polarization axis.

Abstract: An integrated SAW device features an electronic assembly, a SAW device mounted to the electronic assembly, and a heater element on the SAW device to minimize thermal resistance between the SAW device and the heater element.

Abstract: The invention discloses a tuneable resonator (100, 200, 300, 500, 600, 700, 900) with a substrate layer (140, 260, 360, 560, 660, 960), which substrate layer supports a structure with a first electrode (130, 240, 350, 550, 650). In connection to the first electrode there is arranged a layer (120, 230, 330, 530, 630, 930) of a material which can be brought to resonate. The resonator further comprises a second electrode (110, 210, 310, 510, 610, 710, 910) arranged in connection to said material which can be brought to resonate, and the material which can be brought to resonate is a ferroelectric material. The ferroelectric material is brought into resonance by applying an electrical field (DC, AC) between the first and the second electrode, the tuning being achieved by varying the electrical field.

Abstract: A system for protecting against unplanned state changes of a magnetic latching relay (100) includes logic switching logic circuits (101, 105) for controlling a driver circuit (103) that works to supply a drive voltage to a magnetic latching relay (109). The switching logic circuits (101, 105) work to detect any unplanned state changes that may occur due to vibration or the like of the magnetic latching relay (109). The invention acts to switch the magnetic latching relay (109) back to a desired state after this state change has been detected in a two-way radio transceiver or other electronic device.

Abstract: A switching apparatus is disclosed. The apparatus comprises an electrical contactor including a set of main terminals per phase and an auxiliary switch including a set of auxiliary terminals per phase. Each set of the auxiliary terminals is electrically connected to a respective set of the main terminals via a resistance wire, such that each set of the auxiliary terminals is electrically connected in parallel with each respective set of the main terminals. Each resistance wire includes a first terminal at a first end configured to connect to one of the set of auxiliary terminals, and a second terminal at a second end configured to connect to a respective one of the set of main terminals. The second terminal of the resistance wire comprises a retention hook configured to hook onto the respective main terminal.

Abstract: A rectangular coil has several successive windings which are made of a strip-shaped super conductor, which contains at least one core which is embedded in a normal conductive matrix material and which is made of a high-Tc-super conductor material. The coil is made of a strip-shaped superconductor and does not have additional insulation.

Abstract: Disclosed is an actuator device for an optical device. The actuator device includes a core arranged in an optical device inside of which an optical path passes through, a coil wound around the core, and a rotational magnet formed into an approximately cylindrical shape, at least one end of which includes a bearing portion in an axial direction, and which rotates according to a direction of a magnet field output from the core by electrifying the coil. The actuator device further includes a drive pin rotated in association with the rotational magnet, a base member securely supporting the core and rotatably supporting the rotating magnet, and an optical member moving in and out of the optical path based on rotation of the rotational magnet.

Abstract: An inline electromagnetic tool actuator incorporates an actuator housing, an elongated armature, a tool assembly, spaced-apart return magnets, at least one drive magnet, and at least one magnet wire. The elongated armature is located inside the housing, and is adapted for reciprocating linear movement along a notional assembly axis. The tool assembly is operatively attached to the armature. The return magnets are located inside the housing, and are coaxially aligned with the armature. The return magnets have respective inward facing surfaces defining respective magnetic poles. The drive magnet is affixed to the armature, and is arranged between the return magnets. The drive magnet has opposing outward facing surfaces each of like polarity to adjacent inward facing surfaces of the return magnets. The magnet wire is coiled about the armature.

Abstract: Ferromagnetic bodies, the number of which is n (n is an integer greater than or equal to two), are secured to an inner circumferential surface of a cylindrical yoke. A first gap S1 is provided between ferromagnetic bodies that are adjacent to each other in the circumferential direction. Active magnetic poles, the number of which is m (m is an integer greater than or equal to two), apply magnetic fields to each ferromagnetic body from radially inside. As a result, each magnet has magnetic pole portions the number of which is m. A third gap is provided between each pair of the active magnetic poles that correspond to a common ferromagnetic body. The angular width of the third gap is set greater than a first angular width of the first gap. As a result, all magnetic pole centers are easily arranged at equal angular intervals.

Abstract: In various embodiments, a self-clinching magnet (SCM) may be used to mount a magnet in a panel or for use in alignment. The SCM may include an outer shell with a clinching portion and an inner magnetic core. The clinching portion may hold the SCM in a hole in a panel by engaging sidewalls in the hole. The clinching portion may be positioned on the outer shell of the SCM so the SCM is flush with a side of the panel when the SCM is inserted into the panel. The SCM may be mounted in a door and a switch may be mounted to detect when the door is open or closed (by detecting the presence of the magnet). The SCM may also be used to align a tape magazine in a receiver.

Abstract: The present invention relates to a process of producing a permanent magnet, which includes extruding a preform to form a plate-shaped permanent magnet, in which the preform is extruded in such a way that a dimension of a cross section of the preform is reduced in an X-direction and enlarged in a Y-direction perpendicular to the X-direction. The present invention also relates to a plate-shaped permanent magnet formed by extruding a preform, in which the preform is extruded in such a way that a dimension of a cross section of the preform is reduced in an X-direction and enlarged in a Y-direction perpendicular to the X-direction, whereby the permanent magnet has a strain ratio ?2/?1 with respect to the preform in a range of 0.2 to 3.5, in which ?1 is a strain in the direction of the extrusion of the preform and ?2 is a strain in the Y-direction.

Abstract: A permanent magnet has a D-shaped cross section including an arcuate top surface (22), a flat bottom surface (24), and side surfaces (26, 28). Provided that a plurality of permanent magnets are circumferentially arranged so that a great circle (S) circumscribes the apexes (P) on the arcuate top surfaces (22), the top surface (22) includes a central region which delineates an arc of a small circle (T) off-centered from the great circle, and end regions (22a, 22b) which are positioned outside the small circle (T) and inside the great circle (S).

Abstract: A transformer includes a magnetic core assembly, a circuit board, a plurality of pins and at least an interface layer. The magnetic core assembly includes a first magnetic part and a second magnetic part. The circuit board is arranged between the first magnetic part and the second magnetic part, and has a winding coil patterns including a primary winding coil and at least a secondary winding coil. The pins have first ends mounted onto the circuit board. The interface layer is arranged between the first magnetic part and the circuit board and/or between the second magnetic part and the circuit board such that the circuit board lies flat on the interface layer and is secured to the first magnetic part or the second magnetic part via the interface layer.

Abstract: An inductor comprises a drum core which comprises a sintered magnetic material and has a winding axis and a pair of collars in a plate shape provided on both ends of the winding axis. The inductor further comprises a coil conductor wound on the winding axis of the drum core, the coil conductor is covered on an outer periphery thereof with a composite magnetic material in a sheet form containing a resin and magnetic powder, and the composite magnetic material in a sheet form is adhered to the outer periphery of the coil conductor except at least for inner surfaces of the pair of collars of the drum core facing each other.

Abstract: A supporting component (10) for assembling an inductive element comprises a base on the top face of which a protrusion for accommodating the inductive element is embodied, wherein a recess is provided in said protrusion for receiving an electronic component and/or a ferrite element. Furthermore, an interference suppression coil device with a supporting component is provided, wherein the supporting component comprises a protrusion serving for accommodating an interference suppression coil. Moreover, a method for the manufacture of an inductive component to be assembled on a printed circuit board is provided.

Abstract: Techniques are disclosed for fabricating tunable electrical components in integrated circuits. For example, a method of tuning a value of an electrical component, such as a planar inductor, includes the steps of placing a conductive layer in proximity of the electrical component, and adjusting an amount of material that constitutes the conductive layer such that the value of the electrical component is tuned to a particular value. The adjustment step may be performed so as to select a frequency band with which the inductor is associated or to correct a manufacturing deviation in a frequency with which the inductor is associated.

Abstract: A inductance variable device includes a first inductor, a second inductor magnetically coupled to the first inductor, a current source whose current is variable, electrically connected to the first inductor, and a current control unit. The current control unit controls a current flowing from the current source to the first inductor according to a feedback signal having frequency information in a current flowing in the second inductor to vary a combined inductance of the second inductor.

Abstract: A striker pin in a thermal switch configured as a mechanical link between a bimetallic disk and an armature spring. The striker pin includes a pin of molded ceramic material. The pin has a generally cylindrical shape, a first axial end, and a second axial end. The first axial end is fastenable in fixed relation to an armature spring. A metallic film is fused to the second axial end. A metallic/synthetic deposit is fused to the metallic film such that the metallic/synthetic deposit substantially covers the second axial end.

Abstract: A medical device, with an operating element for triggering the medical device, includes a safety system for preventing an erroneous triggering of the device. The present invention encompasses a method for controlling the medical device including determining if an operating command is given by a person prior to the device's carrying out the command.

Abstract: A method of disarming an alarm system in a premises by detecting motion of at least part of a door in the premises to trigger generation of a challenge signal; transmitting the challenge signal; receiving a response signal from an associated disarm device such as a keyfob; determining if the response signal is valid as having been generated by an authorized disarm device; and if the response signal is valid, then transmitting a disarm message effective to cause the alarm system to become disarmed.

Abstract: To provide an entry control system as well as an entry control method allowing for an easy entry of user, permitting a restriction to persons who have a legitimate right to enter a facility, an illuminating device (1) emits a modulated visible light signal 13 modulated by use of a door ID code into a preset illumination range, the modulated visible light signal 13 from the illuminating device (1) is received by a mobile terminal (2) portable by the user, where it is demodulated for wireless signal transmission, and the door ID code transmitted from the mobile terminal (2) is received by an authentication device (3), which judges whether or not the door ID code is legitimate, and generates an unlock command when the door ID code is judged to be legitimate, and a door (4) for a facility controlled of entry receives the unlock command from the authentication device (3), whereby it is unlocked.

Abstract: When a demodulated signal of a radio signal in Ch1 transmitted from a TPMS transmitter is acquired, a control IC controls the frequency of a signal inputted from a PLL circuit to a mixer into a frequency for converting a TPMS radio signal into an intermediate frequency signal of a specific frequency. When the demodulated signal of the radio signal transmitted from a portable unit through two frequency channels is acquired, the control IC determines a channel whose state of communication is favorable from between Ch2 and Ch3, and controls the signal frequency for conversion into a frequency for converting a keyless radio signal in the determined channel into an intermediate frequency signal.

Abstract: A system for tracking railcar identification and location within a rail yard including readers positioned near rail yard switches and remotely connected to a system data processing computer, typically a PC. The readers include antennas for interrogating RFID tags attached to railcars with radio waves. Identification data obtained from the RFID tags is transmitted from the readers to the system PC via electrical power lines within the rail yard. Processing of the data to standard T-94 format is shifted from the readers to the system PC thereby reducing the processing capability required at each reader.

Abstract: A flame resistant RFID tag comprises: a first flame resistant polymer film having a major surface; an RFID device secured to the major surface of the first flame resistant polymer film, the RFID device having proximal and distal surfaces and comprising an antenna electrically connected to an integrated circuit; and a first flame resistant pressure sensitive adhesive layer covering the distal surface of the RFID device. Methods of making the flame resistant RFID tags are also disclosed.

Abstract: A radio frequency identification (RFID) tag comprises an antenna folded into a three-dimensional configuration defining at two antenna layers that reside in different planes. Spacer material separates at least two of the antenna layers.

Abstract: A portable electronic device having an RFID function has an RFID antenna having a planar coil formed by winding a conductor. The RFID antenna is a loop antenna having a loop diameter corresponding to RFID with a strong electromagnetic field characteristic, and has an antenna pattern where a part of its coil turn which is other than an innermost coil turn is placed inward of the innermost coil turn. The antenna pattern can be provided by bending or branching a part of a coil turn of the conductor which is other than the innermost coil turn in such a way that the part of the coil turn is laced inward of the innermost coil turn, thereby ensuring compensation for the magnetic field strength at the center portion of the antenna and achieving excellent communications without a non-communicatable area even with the RFID having a slight electromagnetic field characteristic.

Abstract: The semiconductor device includes a signal processing circuit, an antenna circuit that is connected to the signal processing circuit, and a storage means that supplies electric power to the signal processing circuit. The signal processing circuit receives and transmits information through the antenna circuit, generates a direct current voltage from signals received by the antenna circuit, and stores the direct current voltage in the storage means. Furthermore, the antenna circuit has an antenna portion that receives signals by an electromagnetic induction method and an antenna portion that receives signals by a microwave method so that signals of frequencies from a wide band can be received. Because signals from a wide band can be received, the environment in which the storage means can be charged is widened.

Abstract: A communication link is established between the smart card and a computer using a valid smart card communication protocol. A smart card communication device determines the valid smart card communication protocol used by a smart card by polling a communication channel using a plurality of smart card communication protocols until a valid acknowledgment message is received. A radio frequency circuit is configured to communicate with the smart card using the valid smart card communication protocol. A digital signal processor having at least two demodulators demodulates an incoming data stream produced by the receiver in accordance with the valid smart card communication protocol in a dynamically reconfigurable manner.

Abstract: Methods and apparatus for using an energy emanating device that finds a person (17a,b) object or system based on preselected attributes (33) stored in the energy emanating device (10) are disclosed. Searching Methods are used to compare the attributes (33) of individuals, and a match is determined based upon the correlation of these attributes (33). The matching is accomplished using a variety of algorithms, including a “Distance Formula.” In alternative embodiments, the invention may be used in a search engine.

Abstract: A mobile file, identification and security system device is disclosed with a particular architecture for allowing a card swiper/reader, vehicle computer, signal processor, signal receiver/transmitter, and receiver with display screen and speaker to transmit status/data-information i.e. a person name, vehicle tag and registration numbers, vehicle insurance effective dates, vehicle driver-owner-occupant name, vehicle make-model-color and associated business-commercial name and address affiliation, etc to any home, medical office, security gate check point, law enforcement/security vehicle, or remote location for verification, convenience, and identification and also for allowing a law enforcement/security officer portable handheld vehicle anti-theft device to jam/disable a vehicle engine-electronics system while in motion (being pursued) or parked. Intended user is the military and law enforcement, and any home, medical office, security gate checkpoint, or vehicle.

Abstract: An electronic notification system that allows primarily for patrons of a business, such as a restaurant or other establishment, to use his or her telephone or other device having internet access to make a reservation, see wait times, make special requests and receive a telephone call once a table is ready or other service is available. The system also provides information to business establishments on clients including, telephone number, preferences and the like. The system can also be broadly used by establishments who have established a customer database of telephone numbers to wage mass telephone marketing campaigns at once to notify patrons of upcoming events and offers. To business establishment users, reports can be made on marketing data and other information collected during use.

Abstract: A power line communication (PLC) device, which is electrically connected with a power line, a power transforming device and an electronic device, includes a transmission element, a power transmitting element and a data transmission element. The transmission element is electrically connected with the power line for receiving a power source and communicating a data through the power line. The power transmitting element, which is electrically connected with the transmission element and the power transforming device, transmits the power source to the power transforming device, so that the power transforming device generates a work power to the electronic device. The data transmission element is electrically connected with the transmission element and the electronic device for transmitting the data to the electronic device.