Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7839309 | Multispeed communications device A physical layer device includes a converter module to convert input data having a first predetermined number of bits into output data having a second predetermined number of bits. A scrambler module is operable to be activated and deactivated. The scrambler module ... | 11/23/2010 |
| 7479906 | Multispeed communications device A physical layer device comprises a mode selector that selects a mode. A clock selects a clock frequency from T clock frequencies based on the mode. A converter module selects one of N mapping functions based on the mode and converts an n-bit input to an m-bit outpu... | 01/20/2009 |
| 7436331 | Rate-28/30 DC-free RLL code A run-length limited (RLL) encoder includes a problematic-block detection module that receives a data block and that generates coding bits that indicate whether at least one of N portions of the data block include one of all ones and all zeros, where N is an integer... | 10/14/2008 |
| 7425906 | Method of code generation, and method and apparatus for code modulation A method of generating codewords that conform to a run length limited (RLL) constraint represented by (d, k, a, b), where d is a minimum run length of a codeword, k is a maximum run length of the codeword, a is a length of source data, and b is a length of the codew... | 09/16/2008 |
| 7362839 | Techniques to adjust vertical offset Techniques to modify bias levels of a limiting amplifier based on a transition measurement and measurements before and after the transition. ... | 04/22/2008 |
| 7358871 | Method and system for decoding data A system and method for decoding a received data stream is disclosed. The method includes detecting first and second data transitions of a received data stream. Each of the data transitions is of a first transition type (e.g. rising or falling transition). The time ... | 04/15/2008 |
| 7348900 | Method and apparatus for encoding/decoding in fixed length A modulation method for a first data string having a plurality of symbols is disclosed. The method includes: appending a data string to the first data string to form a second data string; and converting the second data string to a code word sequence by converting ea... | 03/25/2008 |
| 7336207 | Modulation table, modulating apparatus and method, program, and recording medium A modulation table for converting data with a basic data length of m bits into a variable length code (d,k;m,n;r) is provided. The modulation table includes a basic table for converting data patterns into code patterns and a replacement table for replacing data patt... | 02/26/2008 |
| 7333033 | Modulation table, modulating device and method, program, and recording medium A modulation table configured to convert data having a basic data length of m bits into variable length code (d, k; m, n; r) is provided. The modulation table includes a maximum constraint length r>1, a minimum run of d (d>0), a maximum run of k, and a basic codewor... | 02/19/2008 |
| 7317408 | Digital modulation apparatus and digital modulation method A digital modulation apparatus capable of generating a modulated code so that binary slice is correctly performed when reproducing is provided. To achieve this, in a digital modulation apparatus (10A), a DSV change amount calculator (15) calculates cha... | 01/08/2008 |
| 7304932 | Data recording medium, and data recording method and device A recording method for converting m-bit data into n-bit (where n>m) bit data whose run length is restricted and recoding the converted data on a recording medium, the recording method comprising the steps of when at least preceded data is data containing a special d... | 12/04/2007 |
| 7301484 | Data decoder A method, apparatus and computer program for decoding a data stream. The method comprises the steps of acquiring an analog data signal, determining an initial polarity of the analog data signal, determining a threshold transition level, determining a plurality of tr... | 11/27/2007 |
| 7286064 | Two-dimensional modulation encoding for high density optical storage The present invention relates to an encoding apparatus and a corresponding method for two-dimensionally encoding user data of a user data stream into channel data of a channel data stream along a two-dimensional channel strip of at least two bit rows one-dimensional... | 10/23/2007 |
| 7283011 | Method for performing dual phase pulse modulation A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high and low pulses representing successive M-bit groups. Each of the 2 | 10/16/2007 |
| 7272428 | Wireless electrocardiograph system and method A method and system for wireless ECG monitoring is provided. An electrode connector, transmitter and receiver operate with existing electrodes and ECG monitors. The electrode connector includes connectors for attaching to disposable or reusable single electrodes. Th... | 09/18/2007 |
| 7272097 | Method of detecting data structure of non-return-to-zero data in an optical storage device A method of detecting a data structure of fourteen-bit data in an optical storage device includes connecting a first 8-bit register between an eight-to-fourteen modulator and a leading zero counter, storing 8 least significant bits of the data output from the eight-... | 09/18/2007 |
| 7265690 | Simplified data recovery from high speed encoded data The present invention facilitates data recovery without requiring selection of a sample phase. The data is recovered by sampling a received signal to obtain a number of samples at a number of phases over a given time period referred to as a bit time. The samples are... | 09/04/2007 |
| 7262715 | Bit stuffing method and apparatus for fax and other data communication According to some embodiments, a bit stuffing method is provided for fax and other data communication. ... | 08/28/2007 |
| 7257036 | Method and apparatus for storage device read phase auto-calibration The present invention provides a method and apparatus for performing read phase auto-calibration of a storage device. The method includes writing the data with at least one predetermined pattern into the storage device, reading the data according to a read phase of ... | 08/14/2007 |
| 7256718 | Modulation apparatus and method The present invention pertains to a modulation apparatus and method in which the modulation apparatus is realized with a simple circuit structure and is easily applicable to other systems. A pattern conversion unit 32 converts data having a basic data length ... | 08/14/2007 |
| 7248188 | Encoder and decoder An encoded-bit-string generating unit generates a bit string encoded by scrambling an input bit string. A direct-current-component evaluating unit selects a bit string having a predetermined width in the bit string generated by the encoded-bit-string generating unit... | 07/24/2007 |
| 7245238 | Method and apparatus for data encoding A method and apparatus for data encoding such as 3 to 4 encoding (base64, uuencode etc.) is provided. Bytes of data to be encoded having negative values are made positive while preserving the information to be encoded. The positive values may be manipulated by addit... | 07/17/2007 |
| 7221294 | Multispeed communications device A physical layer device for a network device comprises a converter module that selectively converts an n-bit input to an m-bit output based on first and second mapping functions. A scrambler module selectively scrambles the m-bit output. An encoding module receives ... | 05/22/2007 |
| 7218262 | Modulation system A 6-bit output code word is generated in response to every 4-bit input code word by referring to a set of encoding tables. The encoding tables contain output code words assigned to input code words, and contain encoding-table designation information accompanying eac... | 05/15/2007 |
| 7218254 | Balanced disparity channel code for DC control A coder is fed with precoded data such that the absolute value of the running digital sum (RDS) of the code words as produced by the coder is limited. This is achieved by ensuring that in a group of 2 code words, the RDS of the first code word is compensated by the ... | 05/15/2007 |
| 7215991 | Wireless medical diagnosis and monitoring equipment A medical diagnosis and monitoring system having at least one sensor for detecting an electrical, physical, chemical, or biological property of a patient such as, but not limited to, EEG- and EKG-signals, respiration, oxygen saturation, temperature, perspiration, et... | 05/08/2007 |
| 7212483 | Modulation device, modulation method and recording medium When a code word sequence is generated by converting input data words of p bits into code words of q bits and concatenating adjacent ones of the code words with a merge bit sequence of r bits in order to obtain the best DSV value, according to one aspect, the adjace... | 05/01/2007 |
| 7199783 | Wake-up detection method and apparatus embodying the same An input apparatus is disclosed having a hand-sensing system, a wake-up detector, and a microcontroller. After a period of inactivity, the apparatus is placed into a sleep mode to conserve power. During the sleep mode, an electrical property that the hand-sensing sy... | 04/03/2007 |
| 7191507 | Method of producing a wireless communication device A method for manufacturing wireless communication devices for use in tracking or identifying other items comprises a number of cutting techniques that allow the size of the antenna for the wireless communication device. Further, the chip for the wireless communicati... | 03/20/2007 |
| 7184509 | Delay locked loop circuit for internally correcting duty cycle and duty cycle correction method thereof A delay locked loop (DLL) circuit having a duty cycle corrector (DCC) that has a broad range of duty cycle correction, consumes only a small amount of power, has few restrictions on operating frequency, and improves the characteristics of a memory device is describe... | 02/27/2007 |
| 7184231 | Precompensation circuit for magnetic recording In a precompensation circuit for magnetic recording of data signals, a clock produces clock signals at a predetermined rate to clock the recording of the data signals. A clock delay generator generates clock delay data relative to the generated clock signals for suc... | 02/27/2007 |
| 7167518 | Bandwidth-efficient modulation in communication systems A transmitter of digital data includes a modulator with an input for a carrier signal and an input for a first stream of control symbols. The modulator modulates the carrier signal with a second stream of symbols produced by the modulator. Each symbol of the second ... | 01/23/2007 |
| 7164369 | System for improving storage efficiency of digital files Data is partitioned and processed along a bit plane that includes symbols holding a particular place in the ordered symbol sequences of digital information to achieve efficient compression and reduce processing complexity. ... | 01/16/2007 |
| 7164371 | Method and apparatus for data coding for high density recording channels exhibiting low frequency contents A method and apparatus for data coding for high-density recording channels exhibiting low frequency contents is disclosed. Coding is used that satisfies both Running Digital Sum (RDS) and Maximum Transition Run (MTR) properties, which are desirable for achieving hig... | 01/16/2007 |
| 7164373 | Data modulating method and apparatus, data demodulating method and apparatus, and code arranging method In a data demodulating method and apparatus, and a code arranging method, a multiplexer multiplexes an input data stream divided by a predetermined length into a plurality of types of pseudo random data streams using multiplexed information of predetermined bits by ... | 01/16/2007 |
| 7135996 | Multispeed communications device A physical layer device for a network device comprises a converter module that selectively converts an n-bit input to an m-bit output based on first and second mapping functions. A scrambler module selectively scrambles the m-bit output. An encoding module receives ... | 11/14/2006 |
| 7132967 | Modulation system A 6-bit output code word is generated in response to every 4-bit input code word by referring to a set of encoding tables. The encoding tables contain output code words assigned to input code words, and contain encoding-table designation information accompanying eac... | 11/07/2006 |
| 7129863 | Interval modulation coding The design of communication and storage systems requires a choice of modulation and coding. In conventional storage and communication systems, the commonly used modulation scheme is called Non Return to Zero (NRZ) and the commonly used codes are called Run Length Li... | 10/31/2006 |
| 7123173 | Method and system for a feed-forward encoder A method and system for a feed-forward encoder is described. The method includes evaluating one or more source characters to determine whether each source character will invert or maintain a current running disparity and determining a running disparity for each sour... | 10/17/2006 |
| 7116250 | Method and apparatus for multi-dimensionally encoding and decoding In a method of multi-dimensionally encoding a user data stream of user words into a channel data stream of channel words evolving in a one-dimensional direction of infinite extent, a user word is encoded into an NRZ channel word by selecting a NRZ channel word from ... | 10/03/2006 |
