Apparatus for transmitting and receiving a power line
April 2, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2342787 2883459 2936367 3495217 Meter terminal unit for use in automatic remote meter reading and control system Transceiver for phase-shift modulated carrier signals Method of, and apparatus for, inserting carrier frequency signal information onto distribution transformer primary winding Receiver for a distribution network power line carrier communication system Receiver of pulsed phase modulated signals Image data transmission process Patent #: 4451853 InventorAssigneeApplicationNo. 07/035255 filed on 04/02/1987US Classes:375/219, TRANSCEIVERS307/1, SUPERIMPOSED UNLIKE CURRENTS327/330, With rectifier or nonlinear impedance327/332, With feedback455/402Over power lineExaminersPrimary: Olms, Douglas W.Assistant: Scutch, III, Frank M. Attorney, Agent or FirmInternational ClassH04B 3/54 (20060101)AbstractA transceiver provides a relatively constant output voltage from its linear amplifier by providing both current and voltage feedback to its operational amplifier. The present invention utilizes common components for both transmitting and receiving and provides an apparatus which can both transmit and receive power line carrier signals which can be used to communicate digital data through phase modulation of the carrier signal. The transceiver of the present invention can be operatively connected to a microprocessor through appropriate filtering and switching. | |
