| 摘要 |
PURPOSE:To provide a simple and convenient digital recording device capable of high-speed recording by modulating the input signal of plural bits with a proper logical operation and converting this into a time sequential signal of one bit. CONSTITUTION:A logical operation means 50 is constituted of exclusive OR elements 52 to 55 and D-type flip flops 56 to 59 and input signals A1(n) to A4(n) of 4 bit inputted to terminal inputs 1 to 4 are encoded, operated based on a specified logic formula and modulated. Then, signals B1(n) to B4(n) outputted from the logical operation means 50 are momentarily multiplexed and converted into the serial signal of 1 bit by a parallel/serial converting means 51. Thus, since a high transfer rate is realized, the speeds of all the parts of a modulation circuit need not be made high, the speed of only the part to be converted parallely and serially needs to be made high and thus, the high speed recording is easily realized. |
