H - Electricity – 04 – L
Patent
H - Electricity
04
L
354/67
H04L 25/49 (2006.01)
Patent
CA 1305258
BIPOLAR WITH EIGHT-ZEROS SUBSTITUTION AND BIPOLAR WITH SIX-ZEROS SUBSTITUTION CODING CIRCUIT ABSTRACT OF THE DISCLOSURE A B8ZS-B6ZS coding circuit commonly used for a B8ZS coding or a B6ZS coding, generating a B8ZS violation signal or a B6ZS violation signal at a same start timing, and formed by a smaller circuit. The B8ZS-B6ZS coding circuit includes a first eight-bit shift register (11), receiving the input unipolar signal and shifting the same in response to a clock signal, the last two flip-flops in the shift register being reset under the B6ZS mode, a first gate (NAND1) outputting a first consecutive zero detection signal when all flip- flops in the first shift register are reset, a second seven-bit shift register (21), the last two flip-flop in the shift register being reset under the B6ZS mode, a second gate (NAND6) outputting a second consecutive zero detection signal when all flip-flop in the second shift register are reset, a third gate (NOR1) outputting an exclusive OR signal of the first and the second consecu- tive zeros detection signals, an inverter (INV1) and outputting an inverted signal of the output from the third gate, a fourth gate (NAND15) receiving outputs from a sixth flip-flop (DFF6) in the first shift register, first, second, fourth and fifth flip-flops (DFF9, DFF10, DFF12, DFF13) in the second shift register, and outputting a first original coded signal, and a fifth gate (NAND16) receiving outputs from the sixth flip-flop (DFF6) in the first shift register, the inverter, and the first, fourth and fifth flip-flops (DFF9, DFF12 and DFF13) in the second shift register, and outputting a second original coded signal.
560932
Furukawa Takahiro
Kosugi Toru
Miyaou Hirohisa
Fujitsu Limited
Mcfadden Fincham
LandOfFree
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