Three-level to two-level decoder
First Claim
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1. For use in a three-level digital data transmission system, the combination comprising:
- means for providing binary signals H, H, L and L indicative of the levels of a self-clocking three-level digital signal having high, low and intermediate levels;
means responsive to said H, H, L and L signals for detecting data presence;
means responsive to the detection of data presence for generating a clock signal at a predetermined time after the detection of data presence; and
means responsive to said H, H, L and L signals and said clock signal for producing a binary output signal representative of a decoded binary form of said three-level signal.
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Abstract
Improved three-level to binary decoding means for use in decoding a three-level digital data signal received from a transmission line in a serial digital data transmission channel. Uniform loading and controlled timing of the decoding are provided.
63 Citations
6 Claims
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1. For use in a three-level digital data transmission system, the combination comprising:
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means for providing binary signals H, H, L and L indicative of the levels of a self-clocking three-level digital signal having high, low and intermediate levels; means responsive to said H, H, L and L signals for detecting data presence; means responsive to the detection of data presence for generating a clock signal at a predetermined time after the detection of data presence; and means responsive to said H, H, L and L signals and said clock signal for producing a binary output signal representative of a decoded binary form of said three-level signal. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification