| 摘要 |
<p>PURPOSE:To simplify circuit configuration by providing a change-over switch whose terminal to be selected is connected to a positive voltage source and a negative voltage source, a means to control the change-over switch based on an input rectangular wave signal, and a magnetic head. CONSTITUTION:The change-over switch 11 is comprised of serially connected analog switches 11a, 11b, and outputs a positive voltage V+ and a negative voltage V- selectively, and the output of the switch is supplied to the magnetic head 16 via an adjusting resistor 13 and diodes 14, 15. A mode control circuit 12 consists of AND gates 12a, 12b, and for example, the AND gate 12a controls the analog switch 11a and the AND gate 12b controls the analog switch 11b based on an input time code signal. Also, the magnetic head 16 scans a magnetic tape 10, and records the data of a time code, etc., on the magnetic tape 10, and also, reproduces the data of a recorded time code, etc. In such a way, the information of the time code, etc., can be recorded on the magnetic recording medium 10 without necessitating a recording amplifier.</p> |
