Title:
RECORDING/REPRODUCING SWITCHING CIRCUIT
Document Type and Number:
Japanese Patent JPS62165490
Kind Code:
A
Abstract:
PURPOSE:To reduce the number of pins and the number of external parts at the formation of an IC by controlling a tape head change-over switch only by a recording control signal. CONSTITUTION:When a recording control signal REC is impressed to an input terminal 10, the voltage of a control pin 13 is gradually boosted, and in accordance with an output signal of a control circuit 12, a switch 19 is turned on and a switch 20 is turned off. Thereby, the change-over switches 19, 20 of a tape head 18 are prepared on the recording state, and even if a switch 15 is turned on, noise caused by the switching of the switches 19, 20 is not recorded on a tape. When the switch 15 is turned on, an AC bias circuit 14 starts to oscillate and an AC bias signal is superposed to a sound signal obtained from a recording amplifier 16 and applied to the head 18. When the signal REC is stopped, the switch 15 is turned off, the switch 20 is turned on and then the switch 19 is turned off. Thereby, noise due to the switching of the change- over switches is not recorded in the tape.
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Inventors:
IMAIZUMI NORIAKI
Application Number:
JP835586A
Publication Date:
July 22, 1987
Filing Date:
January 17, 1986
Export Citation:
Assignee:
SANYO ELECTRIC CO
International Classes:
H04N5/91; G11B5/027; (IPC1-7): H04N5/91
Domestic Patent References:
| JPS60253007A | 1985-12-13 |
Attorney, Agent or Firm:
Koji Yasutomi (1 person outside)