Title:
MAGNETIC RECORDER
Document Type and Number:
Japanese Patent JPH01211374
Kind Code:
A
Abstract:
PURPOSE:To realize narrow-band transmission so that recording and reproducing can be made by means of an electromagnetic conversion system, such as a tape-head system by controlling a code inverting circuit in such a way that the mean value of signal trains outputted from a duo-binary signal generating circuit can become zero. CONSTITUTION:The output signal of a signal generating circuit 2 which generates duo-binary signals that are a kind of correlation code is supplied to a code inverting circuit 3 and code inversion controlling signal generating circuit 4 and the output signal of the code inverting circuit 3 is supplied to a tape-head system 100. The code inverting circuit 3 is controlled by means of the output signal of the code inversion controlling signal generating circuit 4 so that the mean value of signal trains outputted from the signal generating circuit 2 can become zero. Therefore, the output signal of the circuit 3 can be transmitted in a band which is narrower than that of the duo-binary signals and can be recorded and reproduced with a system which can hardly make DC transmission, such as a tape-head system, since the DC component becomes zero, even though the output signal of the circuit 3 are transmitting codes which reproduce the same ternary signals as the duo-binary signals.
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Inventors:
KOBAYASHI MASAAKI
NAGAOKA YOSHITOMI
SHIMOTASHIRO MASAFUMI
MATSUDA TOYOHIKO
NAGAOKA YOSHITOMI
SHIMOTASHIRO MASAFUMI
MATSUDA TOYOHIKO
Application Number:
JP3817388A
Publication Date:
August 24, 1989
Filing Date:
February 19, 1988
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04N5/92; G11B20/10; (IPC1-7): G11B20/10; H04N5/92
Attorney, Agent or Firm:
Tomoyuki Takimoto
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