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Class Information
Number: 341/68
Name: Coded data generation or conversion > Digital code to digital code converters > To or from nrz (nonreturn-to-zero) codes
Description: Subject matter for converting digital signals to or from a digital signal waveform wherein the signal levels do not return to zero between successive bit periods.










Sub-classes under this class:

Class Number Class Name Patents
341/69 Return-to-zero to or from nrz (nonreturn-to-zero) codes 70
341/70 To or from bi-phase level code (e.g., split phase code, manchester code) 114
341/71 To or from bi-phase space or mark codes (e.g., double frequency code, fm code) 27
341/73 To or from coded mark inversion 42
341/72 To or from delay modulation code (e.g., miller code, three frequency code, mfm code) 26
341/74 To or from double density code 4


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
4954826 Digital code conversion apparatus Sep. 4, 1990
4910517 Digital data detector Mar. 20, 1990
4884074 Method and apparatus for encoding and decoding binary information Nov. 28, 1989
4791407 Alternate mark/space inversion line code Dec. 13, 1988
4747113 Process for the base band modulation of a data signal, as well as the corresponding modulation and demodulation apparatuses May. 24, 1988
4617552 Method and apparatus for converting a digital data Oct. 14, 1986
4612508 Modified Miller data demodulator Sep. 16, 1986
4598267 Method and apparatus for converting a digital signal Jul. 1, 1986
4595907 PCM data translating apparatus Jun. 17, 1986
4567464 Fixed rate constrained channel code generating and recovery method and means having spectral nulls for pilot signal insertion Jan. 28, 1986
4456905 Method and apparatus for encoding binary data Jun. 26, 1984
4425562 Device for coding signals which are distributed between a number of channels Jan. 10, 1984
4377805 Magnetic recording Mar. 22, 1983
4337457 Method for the serial transmission of binary data and devices for its implementation Jun. 29, 1982
4325053 Method and a circuit for decoding a C.M.I. encoded binary signal Apr. 13, 1982
4307381 Method and means for encoding and decoding digital data Dec. 22, 1981
4232388 Method and means for encoding and decoding digital data Nov. 4, 1980
4204199 Method and means for encoding and decoding digital data May. 20, 1980
4063235 Non-return to zero mark to non-return to zero level code converter Dec. 13, 1977
4007421 Circuit for encoding an asynchronous binary signal into a synchronous coded signal Feb. 8, 1977
4001811 Method and apparatus for coding and decoding digital information Jan. 4, 1977
3988729 Differential pulse code modulation Oct. 26, 1976
3976996 Conversion of FSK to NRZ coding Aug. 24, 1976
3937881 Method of and system for transcoding binary signals with reduced changeover rate Feb. 10, 1976

1 2 3 4










 
 
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