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US 6,333,925 B1Granted
Code division multiplex communications system
AssigneeClarion Co., Ltd.
InventorsKazuo Tsubouchi, Kazuya Masu, Yasuhito Fujita
Life of this patent
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Abstract
A code division multiplex communications system has a receiver for receiving a radio wave and transforming the radio wave to an electric signal. A voltage-current converter converts the electric signal to a current signal. A current delay mechanism then sequentially reads the electric signal during a clock pulse. Adders and subtractors manipulated output currents of the current delay mechanism in accordance with a spread code and a reproducing mechanism reproducing a transmission signal depending on the output of the adder and subtractor.
Claims8
A code division multiplex communications system comprising:
- receiving means for receiving a radio wave and transforming the radio wave to an electric signal;
- voltage-current converting means for converting the electric signal to a current signal;
- current delaying means for sequentially reading the electric signal at a timing of a clock pulse;
- adding and subtracting means for adding and subtracting output currents of the current delaying means in accordance with a spread code;
- and
- reproducing means for reproducing a transmission signal on the basis of an output of the adding and subtracting means.
3 more elements
Dependencies are inferred from the claim text.