magnetic recording and playback device

Abstract

Abstract PURPOSE:To simplify external circuits by inputting a reproducing output of two magnetic recording and reproducing heads to a signal detection circuit after being mixed, inputting an output of the signal detection circuit to a microcomputer for mechanism control and allowing a microcomputer to discriminate the relation between an operated mechanism and the signal detection circuit. CONSTITUTION:Outputs reproduced by recording/reproducing heads 1, 2 are amplified by reproducing preamplifiers 3, 4, the result is inputted to a low-pass filter 5 via resistors 35, 36. When either a reproducing output of the 1st recording/reproducing head or that of the 2nd recording/reproducing head exists in an input port 25, an output of an input scan output port 23 is inputted, an interblock is reproduced for both and after a prescribed time is elapsed, no input exists at the input port 25. Thus, it is not required to provide two circuits after the low-pass filter. When a program search function is given to plural mechanisms in addition to the 1st and 2nd mechanisms, it is executed by using resistors only and the circuit constitution is simplified remarkably.

Inventors

• 👤 Yasuo Nagata
• 👤 康雄 永田

Bibliographic Details