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| Number | Title | Issue Date |
| 7301944 | Media file distribution with adaptive transmission protocols A server/client media file distribution system is provided in which the server system is adapted to receive transmission requests from clients, status information from a network, and protocol information from each client. The server, based upon this information, ada... | 11/27/2007 |
| 7268638 | Apparatus and method for data rate multiplication The invention is a method for pulse position modulating signals which are synchronized to clocked bit periods using a clock comprising the steps of generating two, three or n signals to mark the presence of digital ones during corresponding n time slots occurring du... | 09/11/2007 |
| 7180850 | Frequency offset differential pulse position modulation The present invention provides such a need by utilizing a frequency offset differential pulse position modulation scheme to transmit data between computing devices within a wireless network system. The differential pulse position modulation component of the scheme e... | 02/20/2007 |
| 7075329 | Signal isolators using micro-transformers A logic signal isolator comprising a transformer having a primary winding and a secondary winding; a transmitter circuit which drives said primary winding in response to a received logic signal, such that in response to a first type of edge in the logic signal, a si... | 07/11/2006 |
| 7072409 | Space multiplex radio communication method and radio communication apparatus A radio communication system is comprised of: a transmitting system in which N transmission signals, frequency-converted to the same transmission frequency, are generated by N transmitters, N being an integer equal to or greater than 2, and the transmission signals ... | 07/04/2006 |
| 6937071 | High frequency differential power amplifier A differential CMOS amplifier includes two CMOS inverters and biasing circuitry providing feedback loops across the output and input of each inverter. The biasing circuitry provides linear biasing so that the inverters can apply a desired gain to a pair of high freq... | 08/30/2005 |
| 6903578 | Logic isolator A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal th... | 06/07/2005 |
| 4995054 | Data transmission using switched resonance A transmission arrangement includes a switched resonant circuit (5) for switching data states of digital signals on a pair of transmission lines (1, 2) and a regenerative circuit (7) for feeding power back on the lines. The switched resonant circuit has a... | 02/19/1991 |
| 4307380 | Transmitting signals over alternating current power networks This invention relates to communication systems of the type particularly useful in power line communications. Signals to be transmitted, which can be in the form of short, fixed frequency signals, are expanded in time and/or bandwidth to provide a longer ... | 12/22/1981 |
| 4272758 | Arrangement for providing a power supply and transmitting electrical signs between two devices using a small number of contacts An arrangement for both exchanging data between first and second devices and supplying power from the first to the second device, all through only two interconnecting lines or contacts. Data transmission from the first to second device is accomplished by ... | 06/09/1981 |
| 4271526 | Three-level, self-clocked data transmission system A serial digital data transmission system wherein pairs of binary input signals are encoded into a self-clocked three-level signal having high, low and intermediate levels for driving over a transmission line with level transitions occurring in response t... | 06/02/1981 |
| 4227045 | Data processing protocol system A transceiver circuit for connecting a data processing unit to a communication bus, wherein said data processing unit is capable of transmitting, receiving and processing non-return to zero (NRZ) signals having a normally high level and assuming a low lev... | 10/07/1980 |
| 4217572 | Arrangements for transmitting electrical signals between two devices which are connected by contacts A system for transmitting digital signals between a fixed transmitter and a portable receiver which are temporarily interconnected by physical contacts which employs a single pair of contacts and a bidirectional data transfer technique to enhance the inte... | 08/12/1980 |
| 4210933 | Process and apparatus for digitally clamping pulse code modulated video signals A process and associated apparatus for digitally clamping pulse code modulated video signals is disclosed, including four separate preferred embodiments. The disclosed process first requires that during each horizontal scanning interval a difference betwe... | 07/01/1980 |
| 4206316 | Transmitter-receiver system utilizing pulse position modulation and pulse compression Transmitter are receiver systems are disclosed including an encoder and a decorder, respectively. The encoder samples an incoming analog video signal and operates a periodic bipolar pulse pair whose phase separation is proportional to the amplitudes of th... | 06/03/1980 |
| 4199656 | Digital video signal processor with distortion correction An apparatus for compensating for signal distortions in an input digital signal, such as a pseudo video scan line having a television video scan line format and capable of comprising a complete self-contained packet of digital information sufficient to pr... | 04/22/1980 |
| 4193034 | Radio receiver for FSK signals A simple radio receiver for FSK signals as used in a paging system. RF signals from the aerial are mixed in two high gain mixers with local oscillator signals which are in quadrature and which are at the nominal center frequency of the input signal. The o... | 03/11/1980 |
| 4131917 | Frequency limiter Frequency modulated pulses representing dark/light variations on a document are applied to a frequency limiting circuit prior to synthesizing a low distortion sinewave voice band signal from the pulses. The frequency limiting circuit detects the frequency... | 12/26/1978 |
| 4130840 | Method and apparatus for coupling facsimile signals to a telephone network A frequency modulated facsimile signal is synthesized from a high frequency signal having a frequency which varies in response to dark/light variations on a document. The higher frequency signal which comprises pulses is coupled to a synthesizing network ... | 12/19/1978 |
| 4047055 | Line control unit for teleprinters In a line control unit for teleprinters, a pair of isolating circuits are disposed between the line transistors and the generating circuit, so that there is no electrical connection between the line and the signal generator circuit. The generating circuit... | 09/06/1977 |
| 3993867 | Digital single signal line full duplex method and apparatus A driver circuit that permits full duplex transmission of digital data on a single signal line includes means for enabling a receiver of a station having a transmitter and a receiver to ignore outgoing digital signals from the transmitter of the same stat... | 11/23/1976 |
