| 摘要 |
PURPOSE:To record analog signals with a low distortion factor and also to reduce the power consumption of a recording magnetic head, by recording the analog signal to a magnetic recording medium after superposing it on a high frequency pulse signal consisting of positive and negative pulses which are arrayed alternately with fixed amplitude. CONSTITUTION:A direct current of a prescribed level is superposed on an analog signal A, and this signal A is supplied to a non-reverse amplifier 2 and a reverse amplifier 3 through an input terminal 1. Then analog signals of forward and reverse phases are supplied to both ends of a coil of a magnetic head H via semiconductor switching elements 4 and 5. The 1st high frequency pulse signal is supplied to an input terminal 8; while the 2nd high frequency pulse signal having the same frequency and the same time width as the 1st pulse and each pulse set approximately at the middle of the 1st pulse is supplied to an input terminal 9. Then a signal current C containing the signal A superposed on a high frequency pulse signal B is supplied to the head H. |
