Class 341/72 - To or from delay modulation code (e.g., Miller code, three frequency code, MFM code)

Subclass of Class 341 - Coded data generation or conversion
Definition: Subject matter for converting digital signals to or from
No. of patents: 28
Last issue date: 04/07/2009

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Number	Title	Issue Date
7515074	Coding information in integrated circuits A method for coding information in an electronic circuit and an electronic circuit for coding information uses at least two electrically coupled signal paths (X0, X1). Cross-talk between two electrically coupled signal paths (X0, X1) can ...	04/07/2009
7349511	Synchronous network A synchronous network having a multiplicity of nodes which can transmit data to one another in a predefined sequence for a predefined duration is described. The described network is distinguished by the fact that a plurality of nodes, or all the nodes, can output a ...	03/25/2008
7233745	Field device configured for wireless data communication Field devices comprising a transmitter and/or receiver for wireless data communication are provided. It is proposed to evaluate the energy available for wireless data communication in data transmitting or data receiving field devices prior to activation of the trans...	06/19/2007
7209123	Modular keyboard A computer user interface device is provided, made up of modules having separate sets of user interface features. For instance, a keyboard device has a first module bearing standard alphanumeric and control keys, and a second module, selected from a set of optional ...	04/24/2007
7106224	Communication system and method for sample rate converting data onto or from a network using a high speed frequency comparison technique A communication system, source and destination ports of the communication system, and methodology is provided for transporting data in one of possibly three different ways. Data is transported across the network at a frame sample rate that can be the same as or diff...	09/12/2006
7082091	Information reproducing method judging a multivalued level of a present cell by referring to judged multivalued levels of a preceding cell and an ensuing cell A mark representing information of a multivalued level is recorded in each of cells arranged in a recording medium. Upon reproducing the multivalued level from a reproduction signal of the recording medium, the multivalued level of a present cell is judged by referr...	07/25/2006
7062224	Method and system for identifying and monitoring repeater traffic in a code division multiple access system An apparatus and method for identifying remote communications transmitted via a repeater from remote communications not transmitted via the repeater. The method comprises the steps of receiving a plurality of signal transmissions originating from a plurality of remo...	06/13/2006
7049867	PLL circuit and image display device A PLL circuit that makes a voltage-controlled oscillator converge to a stable state within a short time and generates a clock signal with high stability even when discontinuity occurs in the period of a reference input signal is provided. The PLL circuit has a volta...	05/23/2006
6904539	Method of determining data transfer speed in data transfer apparatus A method of determining a transfer speed of an encoded data signal including a clock signal and a data signal is provided. First, the encoded data signal is decoded to generate a decoded clock signal. Then, a data transfer speed of the encoded data signal is determi...	06/07/2005
6836223	Ultra-wideband pulse modulation system and method An ultra-wideband pulse modulation apparatus, system and method is provided. The pulse modulation method increases the available bandwidth in an ultra-wideband, or impulse radio communications system. A set of different pulse transmission, or emission rates are empl...	12/28/2004
6712534	Ergonomic and efficient keyboard An ergonomic computer keyboard which integrates conventional keyboard features to form a Multi-Dexterous Keyboard (MDK) system designed to minimize Repetitive Stress Injuries. Specific emphasis is placed on the general and simultaneous utilization by either a single...	03/30/2004
6400288	Method and apparatus for generating code words with shifted tribit error protection An encoder is provided that converts data words into code words. The code words, when concatenated together, are such that sub-strings of consecutive first symbols in the code words have no more symbols than a maximum number; sub-strings having the maximu...	06/04/2002
6028540	Encoding/detection method for digital data A binary data encoding and decoding technique that alternates between starting polarities of a signal for both each occurrence of a binary 1 and each occurrence of two or more consecutive binary 0's. To encode a binary 1, the signal is one polarity for on...	02/22/2000
5930303	Digital modulation employing single sideband with suppressed carrier A method for transmitting "biphase" encoded digital signals including the steps of setting an aperture corresponding to a data bit; dividing said aperture into a plurality of segments; setting a first segment, selected from said plurality of segments of s...	07/27/1999
5699059	Keyboard incorporating game player A game player is incorporated into a computer keyboard. Circuitry is provided for reading game code from a record-bearing medium. The medium may be a CD, DVD or other optical disk, in which case a CD, DVD or other optical disk drive is provided. The mediu...	12/16/1997
4983965	Demodulation apparatus An original digital signal is converted into either a Miller-squared code signal or a Miller code signal, and undergoes serial-to-parallel conversion to produce n-phase signals (where n is desired to be a positive even number). N-phase virtual demodulated...	01/08/1991
4965575	Data alignment circuit and method for self-clocking encoded data A self-clocking three-part encoded data stream is recorded on a magnetic media during a velocity varying period of time. The recording device encodes clock and data pulses. The polarity of the clock and data pulses are requried to be known in order to cor...	10/23/1990
4963868	Frame synchronizing method and system An original data stream encoded into an M2 coded data stream having a plurality of bit cells has a synchronizing signal with a unique sync pattern based on the logic levels of the original data stream inserted into the M2 coded data ...	10/16/1990
4617553	Enhanced Miller code An encoded signal free of dc content is provided by modifying the Miller encoding scheme for digital data streams. The digital data stream is broken up into a sequence of blocks delineated by a one-to-zero transition at the beginning of each block. Each b...	10/14/1986
4612508	Modified Miller data demodulator A data demodulator is composed of a data separation circuit which produces synchronizing clock pulses from M2 modulation data which is reproduced by a data recording device and separates the M2 modulation data into clock bits and dat...	09/16/1986
4456884	Phase-lock loop and Miller decoder employing the same A phase-lock loop is disclosed for synchronizing an oscillator signal with a train of input signal pulses, some of which may be missing. The phase-lock loop is of particular use in a decoder for decoding digitally encoded data employing a self-clocking co...	06/26/1984
4454499	Digital Miller decoder A digital decoder for Miller encoded signals is disclosed comprising a resettable counter which is clocked at a frequency which is a large multiple of the base frequency of the Miller encoded signal. Transitions in the Miller encoded data stream are used ...	06/12/1984
4437086	Limited look-ahead means A method and apparatus provide for the elimination of any net DC component from the transmission of binary data sequentially in successive clocked bit cells of a transmission channel wherein logical first bit states, e.g., 0's, are normally transmitted as...	03/13/1984
4410877	Method of coding data bits on a recording medium, arrangement for putting the method into effect and recording medium having an information structure "Method of coding data bits on a recording medium, arrangement for putting the method into effect and recording medium having an information structure." The so-called Miller modulation has the disadvantage that a direct current is generated in the informa...	10/18/1983
4227184	Modified Miller Code encoder A method of balancing digital signals encoded in the Miller Code, which is inherently an unbalanced code. Additional coding rules are utilized based on the use of a transition interval extending from the begining of a bit period to the begining of the nex...	10/07/1980
4212038	Double density read recovery A logic system requiring no tuning adjustments is provided for converting an MFM encoded information stream read from a mass storage medium to a non-return-to-zero (NRZ) information stream. The MFM encoded information stream is routed through an input shi...	07/08/1980
4124778	Digital frame synchronizing circuit A circuit is disclosed for serially formatting digital information such as may be provided in a digital audio magnetic tape recorder in a succession of data blocks or frames, each containing the same number of digital bits and in which each frame is delin...	11/07/1978
3968328	Circuit for automatically correcting the timing of clock pulse in self-clocked pulse signal decoders In dynamic modulation (D.M.) of non-return-to-zero pulse signals, the only condition under which the D.M. signal would remain in the same state, either 1 or 0, for two consecutive pulse intervals is when the NRZ signal includes the sequence 101. Two sampl...	07/06/1976

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Class 341/72 - To or from delay modulation code (e.g., Miller code, three frequency code, MFM code)