JPS5850485Y2 - magnetic recording and playback machine - Google Patents

Description

[Detailed description of the invention] This invention is a magnetic recording/playback machine G equipped with an input terminal for supplying monaural signals to the left and right channels of a stereo signal.
Regarding this.

Conventionally, stereo recorders are generally capable of recording stereo signals independently to each input terminal of the left and right channels.

In recent years, most TV and radio receivers have become stereo broadcasts, but there are still many monaural signals, and when recording monaural signals, you can only use the input terminal of one of the channels on a stereo recorder. can not connect.

Therefore, when recording a monaural signal to the left and right channels at the same time, a switch is installed in the recorder to switch to monaural signals, and the same monaural signal is distributed to the left and right channels for recording.

In this case, there is a drawback that the original left and right stereo signals are also converted into monaural signals.

The present invention eliminates the above-mentioned drawbacks and provides a magnetic recording/playback device that can simultaneously record or play back stereo signals and monaural signals.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, 1 and 3 are input terminals for left and right stereo signals, 2 is a monaural signal input terminal of the present invention, and 4°6 is for left and right stereo signals. An amplifier 5 is a monaural signal amplifier, 7 and 8 are recording heads, and 9 is a magnetic tape.

In this case, first, stereo signals a and c applied from input terminals 1 and 3 are amplified by amplifiers 4 and 6, and the output a'
, c' are supplied to the recording head 7.8 and recorded on the magnetic tape 9.

2 is a terminal into which a monaural signal is input; the signal is amplified by an amplifier 5, and its output is supplied to amplifiers 4 and 6, respectively.

In this case, the amplifier 5 can record the signal from the monaural input terminal 2 into both channels without degrading the separation between the stereo signals a and e.

Note that the amplifier 5 may be omitted as long as the separation between both channels is within an allowable range.

Furthermore, FIG. 2 shows another embodiment in which resistors R1 and R2 are provided between both stereo input terminals 1 and 3 to divide and supply a monaural signal to each channel. By selecting a larger input impedance than the input impedance of No. 6, deterioration of separation between both channels can be reduced.

As described above, the device of the present invention does not require a special circuit such as a mixer for distributing monaural signals to left and right channels.

The present invention is as described above (it is possible to record or playback by supplying a monaural signal to both channels without converting a stereo signal to monaural or deteriorating the separation of both channels with an extremely simple configuration). It is.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a magnetic recording/reproducing machine showing one embodiment of the present invention, and FIG. 2 is a block diagram showing another embodiment of the same. In the figure, 1 and 3 are stereo input terminals, 2 is a monaural input terminal, 4, 5 and 6 are amplifiers, 7 and 8 are recording heads, and 9 is a magnetic tape.

Claims (1)

[Scope of utility model registration request] In a magnetic recording/playback device having a stereo recording/playback function, a monaural signal input from a monaural signal input terminal is supplied to left and right stereo signal amplifiers, and
A magnetic recording/reproducing device characterized in that impedance of a circuit system between the monaural signal input terminal and the left and right stereo signal amplifiers is larger than the input impedance of the left and right stereo signal amplifiers.