Power-line Or Receiver Element Used As Wave Collector Patents (Class 455/270)
  • Patent number: 11211827
    Abstract: Wireless power receivers are described, which are used in conjunction with a wireless power transmission system. For instance, a wireless power receiver is provided comprising an antenna configured to receive wireless power signals from a wireless power signal transmitter. The antenna can be coupled to wireless power circuitry that delivers power based on the wireless power signals received by the antenna. Further, a module is provided that contains the wireless power receiver and couples to a device powered by the wireless power circuitry. Further, the module is configured to couple to the device in a fixed position that affixes an orientation of the antenna relative to the device.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: December 28, 2021
    Assignee: Ossia Inc.
    Inventors: Adam W. Oster, Hatem Ibrahim Munir Zeine
  • Patent number: 10455639
    Abstract: A protocol translation device for use with a first apparatus having a battery compartment and communicating over a first wireless protocol, and for use with a second apparatus communicating over a second wireless protocol. The protocol translation device can include a battery casing sized to fit within the battery compartment, the battery casing defining an interior volume; a translator having a first antenna operable to communicate with the first apparatus, a second antenna operable to communicate with the second apparatus, and a translator circuit operably connected between the first antenna and the second antenna; and a battery operably connected to power the translator. The translator circuit is operable to translate between the first wireless protocol and the second wireless protocol. The translator and the battery are disposed within the interior volume.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: October 22, 2019
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Alexander E. Holmes, Darren Y. K. Yap
  • Patent number: 9992818
    Abstract: A protocol translation device for use with a first apparatus having a battery compartment and communicating over a first wireless protocol, and for use with a second apparatus communicating over a second wireless protocol. The protocol translation device can include a battery casing sized to fit within the battery compartment, the battery casing defining an interior volume; a translator having a first antenna operable to communicate with the first apparatus, a second antenna operable to communicate with the second apparatus, and a translator circuit operably connected between the first antenna and the second antenna; and a battery operably connected to power the translator. The translator circuit is operable to translate between the first wireless protocol and the second wireless protocol. The translator and the battery are disposed within the interior volume.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: June 5, 2018
    Assignee: MEDTRONIC MINIMED, INC.
    Inventors: Alexander E. Holmes, Darren Y. K. Yap
  • Patent number: 9729210
    Abstract: A communication device used for near filed communications (NFC). The device includes circuitry that generates a differential signal for communication with an analog front end of the device. The analog front end includes an impedance matching network and an antenna. The antenna is disposed at a predetermined distance away from the boundary of a battery compartment. The antenna forms a single loop around the battery compartment and is coupled to the matching network either in a differential manner or a single ended manner. The communication device includes a protective back casing that is either metallic or plastic in nature. With the single loop antenna configuration, both types of back covers enable efficient NFC.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: August 8, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Henrik Tholstrup Jensen, Hyungpyo Lee
  • Patent number: 9454870
    Abstract: Systems and methods for analyzing wireless signals in a wagering game environment are described herein. In some embodiment, a wagering game machine includes a wagering game unit configured to present wagering games. The wagering game machine can also include a network interface configured to exchange, with other devices on a wagering game network, information about the wagering games. The wagering game machine can also include a wireless signal detection device configured to detect wireless signals in a wagering game environment and to create wireless signal data for use in determining whether the wireless signals interfere with wireless communications of the wagering game network.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: September 27, 2016
    Assignee: BALLY GAMING, INC.
    Inventors: Jerome Carpenter, James E. Motyl, Craig J. Sylla, Muthu Velu
  • Patent number: 8948274
    Abstract: Systems and methods for enabling co-existence among power line communications (PLC) technologies are described. In some embodiments, a method performed by a PLC device, such as a PLC gateway, may include detecting a communication from foreign PLC device on a PLC network in response to a foreign preamble received by the PLC device, terminating transmissions to the PLC network for a network-specific co-existence Extended Interframe Space (cEIFS) time period in response to the foreign preamble, and resuming transmissions to the PLC network after expiration of the network-specific time period.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: February 3, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: Ramanuja Vedantham, Anand Dabak, Tarkesh Pande
  • Patent number: 8849270
    Abstract: A system includes redundantly configured resources designated as active geo-redundant nodes (AGNs) and standby geo-redundant nodes (SGNs), a set of covered agents (CAs) that rely upon the redundantly configured resources, and a geographic redundancy coverage issuer (GRCI) configured to manage the geo-redundant nodes. The GRCI maintains a CA list identifying a set of subscribers to redundancy management services supported by the GRCI, an AGN list identifying a set of active geo-redundant nodes, and an SGN list identifying a set of standby geo-redundant nodes. The GRCI provides the AGN list and the SGN list to subscriber CAs. In response to receiving a message identifying a failed AGN, the GRCI updates the AGN list to reflect a failed status for the failed AGN and issues an update message to CAs reflecting the failed status for the failed AGN and a transition of an activated SGN to the AGN list.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: September 30, 2014
    Assignee: United States Cellular Corporation
    Inventors: Claudio Taglienti, Narothum Saxena, Michael Irizarry
  • Patent number: 8718571
    Abstract: A transmitting and receiving device includes: a transmission circuit that transmits a signal by FM-modulating a carrier wave of the signal; an FM demodulation circuit that generates a demodulation signal by FM-demodulating the received signal; and a first filter circuit that changes a pass-band for letting the received signal pass through according to the demodulation signal, wherein the transmitting and receiving device perform a power supply line communication through the power supply line in which a signal is transmitted and received among a plurality of the transmitting and receiving devices.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: May 6, 2014
    Assignee: Spansion LLC
    Inventor: Kazuhiro Tomita
  • Patent number: 8693975
    Abstract: A cigarette lighter adapter (CLA) is provided with a main body configured to be connected at one end thereof to a vehicle cigarette lighter socket or auxiliary power socket. The main body of the cigarette lighter adapter is also connected to one end of a coaxial cable. The other end of the coaxial cable is preferably terminated with a standard low cost DC connector for connection to a portable media player (e.g., with integrated or separate satellite radio receiver) or other content source that provides a frequency modulated (FM) radio frequency signal with audio content onto the coaxial cable 60. The FM signal is amplified by an amplifier in the main body of the CLA and then injected into the vehicle power system through the contacts in the mechanical housing of the main body and the vehicle cigarette lighter socket.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: April 8, 2014
    Assignee: Sirius XM Radio Inc.
    Inventors: Gary John Conners, Nenad Popovic, Efrain Luke Rodriguez, Wearn-Juhn Wang
  • Patent number: 8422947
    Abstract: A communication device includes a communication circuit part, a transmission path for signals, a ground, a coupler electrode, and a resonance part. The coupler electrode includes an upper flat part as an electrode, a support, and a connecting portion. The support supports the upper flat part. Thus, the upper flat part faces the ground and is separately placed therefrom at a height only enough to ignore the wavelength of the signal, while having a flexible portion which is elastically deformable in the height direction. On the connecting portion, the other end of the support is connected to the transmission path. The resonance part enlarges a current flowing into the coupler electrode through the transmission path. A micro dipole is a line segment connecting between the center of accumulated electric charge in the coupler electrode and the center of mirror charge accumulated in the ground.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: April 16, 2013
    Inventor: Satoshi Konya
  • Patent number: 8217621
    Abstract: A frequency modulation type wireless power supply and charger system includes a power supply base unit consisting of a first microprocessor, a power circuit, a power switch driver circuit, a first resonant circuit, a first coil, a detection module and a power input interface, and a wireless power supply and charge receiver unit consisting of a secondary coil, a second resonant circuit, a rectifier filter circuit, a detection and protection module, a second microprocessor, a temperature sensor, a charging module and a power output interface and adapted for receiving electrical power from the power supply base unit wirelessly for charging an external electronic device.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: July 10, 2012
    Assignee: Fu Da Tong Technology Co., Ltd.
    Inventors: Ming-Chiu Tsai, Chi-Che Chan
  • Patent number: 8208884
    Abstract: Methods and systems are disclosed that utilize FM tuner ground isolation when using a ground signal line as an FM antenna for an FM tuner integrated circuit (IC) within a portable electronic system. The ground isolation can be implemented, for example, using one or more isolation elements, such as ferrite beads, coupled between the FM tuner ground and the device ground. The ferrite beads can also be coupled between other pins for the FM tuner and the device circuitry. A car lighter adapter (CLA) coupled to the device circuitry can be configured to provide a ground signal line for use as an antenna for the FM tuner IC. Further, signal lines on a printed circuit board (PCB) can also provide a ground signal line for use as an antenna for the FM tuner IC. The device can also be as a personal navigation device.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: June 26, 2012
    Assignee: Silicon Laboratories Inc.
    Inventors: Tian Zhao, Greg Allan Hodgson
  • Patent number: 8086194
    Abstract: A communication apparatus has an A/D converter which converts an analog signal which was received, into a digital signal, a converter which converts a reception signal so as to enable handling of phase information, a carrier detector which detects presence or absence of the reception signal, a synchronous circuit which extract synchronization timing from the reception signal, an equalizer which corrects the reception signal so as to cancel influence of a transmission path, a channel estimator which estimates a state of a power line channel, and a decision unit which decides the reception signal, which was amended by the equalizer, by use of a threshold value.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: December 27, 2011
    Assignee: Panasonic Corporation
    Inventors: Hisao Koga, Nobutaka Kodama, Taisuke Konishi
  • Patent number: 8051309
    Abstract: A mobile computing device is described that includes multiple device components, a power supply and a power line connected to each device component. The power supply is operative to provide power signals to the device components over the power lines. The mobile computing device also includes a processor operative to generate a control signal for one or more device components. A power line communications control module is connected to the power supply and the processor, the power line communications control module is operative to receive a power signal and a control signal for a device component, combine the power signal and control data from the control signal to form a power data signal, and send the power data signal to the device component over a corresponding power line. Other embodiments are described and claimed.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: November 1, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Mostafa Kashi, Yoon Kean Wong, Jerome Tu
  • Publication number: 20100210233
    Abstract: Exemplary embodiments are directed to wireless charging. An electronic device may comprise at least one receive antenna integrated within an electronic device and configured to receive wireless power from a wireless transmit antenna. Further, the at least one receive antenna may be spaced from each conductive component within the electronic device having a clearance therebetween adapted to enable formation of a magnetic field around the loop conductor.
    Type: Application
    Filed: September 4, 2009
    Publication date: August 19, 2010
    Applicant: QUALCOMM INCORPORATED
    Inventors: Nigel P. Cook, Lukas Sieber, Hanspeter Widmer
  • Patent number: 7574187
    Abstract: A method for providing battery charge current to a portable electronic device having a rechargeable battery. The method includes the steps of providing a power adaptor which connects to a power supply and converts power from the power supply into a battery charge current; providing a cable operative to deliver the battery charge current from the power adaptor to the portable electronic device to charge the rechargeable battery; and providing radio frequency (RF) signals induced onto the cable to an RF receiver input.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: August 11, 2009
    Assignee: Sony Ericsson Mobile Communications AB
    Inventors: Edward Craig Hyatt, Markus Jan Friberg, Henrik Carl Floberg
  • Patent number: 7542522
    Abstract: Some embodiments of the invention provide devices, systems and methods of wireless signal detection. For example, an apparatus in accordance with an embodiment of the invention includes a detector to determine whether an incoming input includes a wireless communication signal intended for reception, based on an operation applied to a first auto-correlation value and a second auto-correlation value, wherein the first auto-correlation value represents a correlation between values of the incoming input at times separated by a first delay period, and wherein the second auto-correlation value represents correlation between values of the incoming input at times separated by a second, different, delay period; the first delay period is not an integer multiple of the second delay period, and the second delay period is not an integer multiple of the first delay period.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: June 2, 2009
    Assignee: Intel Corporation
    Inventors: Rony Ross, Simha Sorin, Yuval Finkelstein
  • Patent number: 7392029
    Abstract: A system for wireless communication, particularly for receiving communication signals, said system comprising: A main antenna structure (330), said antenna structure adapted to receive a communication signal (325a) as a first internal signal; and an antenna cable, said antenna cable having a first end operationally coupled to said main antenna structure and a second end, said antenna cable including a main conductor (335) for passing said first internal signal, and a second receiving conductor (340), said second receiving conductor adapted to receive said communication signal as a second internal signal, and wherein said second receiving conductor as a receiving element is spatially separated from the main antenna structure. The disclosed antenna system and apparatus for the extraction of the second, spatially-separated received signal achieves spatial diversity to alleviate multipath effects in wireless communication systems.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: June 24, 2008
    Assignee: NXP B.V.
    Inventor: Viatcheslav Pronkine
  • Patent number: 7302240
    Abstract: A communication apparatus has an A/D converter which converts an analog signal which was received, into a digital signal, a converter which converts a reception signal so as to enable handling of phase information, a carrier detector which detects presence or absence of the reception signal, a synchronous circuit which extract synchronization timing from the reception signal, an equalizer which corrects the reception signal so as to cancel influence of a transmission path, a transmission path estimator which estimates a state of a power line transmission path, and a judging unit which judges the reception signal, which was amended by the equalizer, by use of a threshold value.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: November 27, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hisao Koga, Nobutaka Kodama, Taisuke Konishi
  • Patent number: 7292705
    Abstract: An antenna device disclosed herein is integrated with an earphone for generating sound from an ear receiver, and connected to a wireless equipment through a connector to transmit an audio signal applied from the wireless equipment to the connector through a plurality of earphone signal lines. An antenna element lies between the ear receiver and an intermediate position of an earphone signal line for transmitting the audio signal from the connector to the ear receiver. A branch is disposed at the intermediate position for preventing a high frequency signal on each of the plurality of earphone signal lines from passing therethrough, and for passing the audio signal therethrough to extract a signal received by the antenna element. A coaxial line transmits the signal received by the antenna element and extracted by the branch to the connector through a core line possessed thereby.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: November 6, 2007
    Assignee: NEC Corporation
    Inventor: Nobuya Harano
  • Patent number: 7181164
    Abstract: The present invention is directed to a battery modem using Short Range Wireless technology. A battery modem using a short range wireless technology in a data communication apparatus capable of performing wired/wireless data communication depending on whether a battery is mounted therein, wherein the battery modem detects base band communication data from a power supply line of the data communication apparatus on the basis of the short range wireless technology and a power line modem scheme, converts the data into an RF signal and transmits the RF signal to a data communication apparatus of the other party through a power supply line antenna, and the battery modem receives the RF signal from the power supply line antenna, converts the RF signal into the communication data and outputs the data to the data communication apparatus.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: February 20, 2007
    Assignee: Scoby Electronics Co., Ltd.
    Inventors: Sung-Sub Lee, Gab-Ju Jung
  • Patent number: 7164903
    Abstract: An integrated N-way Wilkinson power divider is described. In one embodiment, the N-way Wilkinson power divider uses a conductor layer with a cross-over (or cross-under) resistor insulated from the conducting layer by an insulating bridge. In one embodiment, the width of the transmission line underneath a cross-over resistor is adjusted to improve performance In one embodiment, a three-way Wilkinson power divider is formed using microstrip transmission lines on a single-layer substrate that supports the microstrip transmission lines, dielectric insulators, and resistors.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: January 16, 2007
    Assignee: Smiths Interconnect Microwave Components, Inc.
    Inventors: Richard Cliff, Michael J. Kettner, Robert J. Wright, Andrew J. Kettner, Patrick A. Biebersmith, Juan G. Ayala
  • Patent number: 7050763
    Abstract: The system has at least two electronic units between which signals are transferred from a first electronic unit and a second electronic unit. The first electronic unit has a signal source. The second electronic unit has a signal sink. A signal to be transferred is converted into a line-independent electromagnetic wave with a transmitting unit and transmitted to a receiving unit. The line-independent electromagnetic wave is received with the receiving unit and converted into a reception signal.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: May 23, 2006
    Assignee: Infineon Technologies AG
    Inventors: Jens-Peer Stengel, Jenoe Tihanyi, Wolfgang Werner, Karim-Thomas Taghizadeh-Kaschani
  • Publication number: 20020106996
    Abstract: The system has at least two electronic units between which signals are transferred from a first electronic unit and a second electronic unit. The first electronic unit has a signal source. The second electronic unit has a signal sink. A signal to be transferred is converted into a line-independent electromagnetic wave with a transmitting unit and transmitted to a receiving unit. The line-independent electromagnetic wave is received with the receiving unit and converted into a reception signal.
    Type: Application
    Filed: January 30, 2002
    Publication date: August 8, 2002
    Inventors: Jens-Peer Stengl, Jenoe Tihanyi, Wolfgang Werner, Karim-Thomas Taghizadeh-Kaschani
  • Patent number: 6272328
    Abstract: A system is provided for detecting the presence of an FM-modulated audio signal from an auxiliary source, and operating a switch to provide that audio signal to a tuner in lieu of the radio frequency signal received at the tuner antenna. The tuner can be a vehicle tuner. The system also comprises a modulator unit for modulating the audio signal and an output plug for insertion into a cigarette lighter receptacle or power receptacle of a vehicle. A radio frequency transmission line, such as a coaxial cable, connects the cigarette lighter receptacle or power receptacle to the vehicle battery and to an antenna switch unit and transports both DC power and the FM-modulated audio signal. The antenna switch unit comprises switched inputs for the vehicle antenna and the output from the modulator unit, and a radio frequency signal detection device for detecting when the FM-modulated audio signal is present. The antenna switch unit provides the output from the modulator unit to the tuner whenever it is detected.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: August 7, 2001
    Assignee: XM Satellite Radio Inc.
    Inventors: Anh Nguyen, Argyrios A. Chatzipetros
  • Patent number: 6104920
    Abstract: The present invention relates to antenna arrangements for radio communications devices including cordless phone handsets and base stations. The handset includes an antenna arrangement incorporating one or more batteries as part of a monopole structure. The base station includes an antenna arrangement incorporating a low voltage power supply cable. Both handset and base station may also optionally further incorporate an antenna structure located in the split line between their respective casing components.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: August 15, 2000
    Assignee: Nortel Networks Corporation
    Inventors: Ian Paul Llewellyn, Martin Stevens Smith, Steven William Sparksman
  • Patent number: 5893023
    Abstract: A satellite receiver which is capable of being connected to different antenna assemblies which require different operating voltages, includes a switch mode power supply which supplies the different operating voltages. A microprocessor controls the duty cycle of the switch mode power supply to produce the different operating voltages in accordance with the required duty cycle. A memory stores values which define different duty cycles for each of the operating voltages and provides the values to the microprocessor.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: April 6, 1999
    Assignee: Ferguson Limited
    Inventor: David Michael Vizer
  • Patent number: 5757177
    Abstract: An infrasonic frequency resonant circuit and method for use thereof. An electric power distribution system is employed both as antenna for ISF signals and as a source of inductive reactance for a resonant circuit tuned to a band within the ISF spectrum. A capacitor is placed from the neutral conductor to the ground conductor at an ac power outlet in a structure to form a resonant circuit ordinarily tuned to a band within the ISF spectrum. An ISF spectrum analyzer is connected to the neutral and ground terminals of the resonant circuit to visualize ISF electromagnetic signals induced on the electric power distribution system in both the frequency domain and the time domain and so as to be more readily evaluated.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: May 26, 1998
    Assignee: OTW LLC
    Inventor: David F. Farnsworth
  • Patent number: 5361405
    Abstract: A broadband radio receiver monitors transmissions over a broadband of frequencies, and especially over the aircraft band, between aircraft and control towers or between the cockpit and ground stations at an airport. The radio utilizes an earphone having a lead which provides an antenna. The lead is AC coupled to an amplifier having band-pass filters connected to the input and to output thereof to provide selectivity while passing the entire band. An AM detector is connected to the output filter and produces an audio signal which is coupled, via an RF blocking inductor, to the earphone by way of the earphone lead. A miniaturized self-contained radio is therefore provided which does not utilize a local oscillator or other radiating signal generator and may be used on board or nearby aircraft without violating regulations for the use of electronic equipment.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: November 1, 1994
    Assignee: Ramsey Electronics, Inc.
    Inventor: John G. Ramsey
  • Patent number: 4625212
    Abstract: An antenna having an antenna aperture area and an antenna reactance comprises a first antenna element (31) defining a first aperture area and a first reactance and a second antenna element (32) connected in parallel to the first antenna element to put a miniature radio receiver into operation in a desired frequency band. The second antenna element has a second aperture area and a second reactance greater than the first aperture area and reactance, respectively, so that the antenna aperture area and reactance are substantially determined by the second aperture area and the first reactance, respectively. The first and the second aperture areas may be coplanar. Alternatively, the aperture areas may be orthogonal to each other.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: November 25, 1986
    Assignee: NEC Corporation
    Inventors: Takashi Oda, Koji Yamasaki
  • Patent number: 4590614
    Abstract: A dipole antenna for a portable radio is contained completely within the insulated housing (10) of the transceiver. The dipole antenna is formed as two conductive surfaces (12, 13) electrically isolated from each other but disposed on the same printed circuit board (11) of the transceiver circuit which supports the circuit modules (14, 15). The two dipole halves are connected to each other by means of a dipole tuning circuit (29). The conductive tracks (23, 26, 27) of the transceiver circuit are interrupted at a location which divides as few tracks as possible. The interrupted tracks are bridged together by high-impedance resistors (22).
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: May 20, 1986
    Assignee: Robert Bosch GmbH
    Inventor: August Erat
  • Patent number: 4577195
    Abstract: The miniaturized mobile radio receiver has a straight dipole antenna whose wires run along the edge of the printed-circuit board(s) of the radio receiver and are connected at their outer ends to conductive areas. The conductive strips on the circuit board(s) which run parallel to the antenna constitute a resistive-capacitive shunt and are, therefore, open in the vicinity of the antenna base to block the flow of RF signals.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: March 18, 1986
    Assignee: International Standard Electric Corporation
    Inventors: Manfred Schwanitz, Dietrich Gaertner, Wolfgang Dressler, Joerg Schenk
  • Patent number: 4507646
    Abstract: A paging system for use in a limited area such as an office, a factory building, a hotel, or other public building wherein the existing electrical supply network is used as the antenna of either the transmitter or the receiver. The electrical supply network is capacitively coupled to the transmitter in the preferred embodiment and in addition supplies power to the unit.
    Type: Grant
    Filed: July 21, 1983
    Date of Patent: March 26, 1985
    Assignee: P.S. Paging System, A.B.
    Inventors: Inge Hamlin, Andre Beudat
  • Patent number: 4369521
    Abstract: Radio receiving apparatus having a receiving unit including an RF stage and a signal processing state, the latter producing an audio frequency signal in response to the RF signal supplied to the RF stage. The receiving unit also includes a jack having at least first and second contacts, the first contact being supplied with the audio frequency signal and the second contact being coupled to a reference potential by impedance means which presents a relatively high impedance to a RF signal. Headphones are connectable to the receiving unit by conducting leads which terminate in a plug that is insertable into the jack. The plug has at least two conductive portions which, when the plug is inserted into the jack, connect to the first and second jack contacts, respectively. The conducting leads which connect the headphones to the plug include at least one signal carrying lead which is connected to the conductive portion of the plug which is connected to the first jack contact and which receives the audio signal.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: January 18, 1983
    Assignee: Sony Corporation
    Inventor: Takeshi Sawada
  • Patent number: 4271534
    Abstract: A microwave receiver is constituted by an antenna having a reflector and a primary radiator, and a converter having an unbalanced input terminal. A core conductor projected from the unbalanced terminal of the converter is extended inside the reflector through a bore formed therein so as to function as the primary radiator of the antenna. The converter is fixed directly to the wall of the reflector.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: June 2, 1981
    Assignee: Alps Electric Co., Ltd.
    Inventor: Akira Takayama