JPH0230898Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mixing device used to mix and output signals from multiple sources such as FM and tape recorders.

As this type of mixing device, one having a configuration as shown in FIG. 1 is known. Here, the output from a source such as a tape recorder is outputted via a mixing amplifier 1, the level is adjusted by a main volume 2, and the output is outputted via an amplifier 3. In addition, for other sources, such as FM, the signal input via the tuner is normally input directly to the mixing amplifier 1 with switch 6 turned on, and the volume is adjusted along with the signal from the previous source using the main volume 2. will be done. However, when mixing using a wireless microphone, it is necessary to raise the level on the tuner side by about 10 dB because the degree of modulation of the wireless microphone is low. Therefore, an amplifier 4 and a mixing volume are provided in parallel with the switch 6, the switch 6 is turned off, the output level on the tuner side is adjusted in advance by the mixing volume 5, and then input to the mixing amplifier 1.

In this case, the problem is that the level-up output from amplifier 4 is output to mixing amplifier 1.
Since it is applied to the main volume 2 through the , an electronic volume with low input resistance cannot be used. Further, since the mixing volume 5 and the main volume 2 are arranged in series, level adjustment is difficult and independent adjustment on the tape recorder side is not possible. Further, when the switch 6 is changed, the level changes suddenly, which causes a sense of discomfort.

The present invention was developed based on the above circumstances, and allows the adoption of an electronic volume with low input resistance by not inputting a high input level to the main volume, and also allows individual level adjustment of each input. Another object of the present invention is to provide a mixing device that can reduce level differences due to switching of a mixing switch.

For this purpose, the present invention provides a device that mixes and outputs signals from multiple sources.
The main volume, which adjusts the output from the main source, and the mixing volume, which adjusts the output from other sources, are connected in parallel, and when the mixing volume is not adjusted using a switch, the other sources can be switched to the mixing volume. It is characterized by being configured so that it is connected to the input side of the main volume without going through it.

Hereinafter, two embodiments of the present invention will be described in detail with reference to FIGS. 2 and 3. First, the embodiment shown in FIG. 2 will be explained. In the figure, reference numeral 11 is a mixing amplifier that receives input from a tape recorder, etc. The input is input to the next stage mixing amplifier 17 via a volume 12, and is output. Ru.

On the other hand, on the tuner side, mixing switch 1
6 and a mixing volume 15 are arranged in parallel, and the mixing switch 16 and a changeover switch 18 arranged in series are interlocked, and when the mixing switch 16 is on, the changeover switch 18 changes the tuner side output. Mixing amplifier 1
1 side, and when off, mixing amplifier 17
Switching operation is performed to supply the water to the side.

In such a configuration, for example, when mixing the output from FM, whose level is almost stable, the mixing switch 16 is turned on, the tuner side output is input to the mixing amplifier 11, and the output from the tape recorder side is output at the volume 12. When mixing when tuning from a wireless microphone where the volume needs to be increased by about 10 dB, the mixing switch 16 is turned off, the level is adjusted via the volume 15, and the level is adjusted via the changeover switch 18 to the mixing amplifier 17. Output. As a result, the output of the volume 12 on the tape recorder side can be adjusted independently, and since high-level inputs are not input, it is possible to use an electronic volume or the like. In addition, output adjustment on the tuner side can also be done independently with volume 15, so
Easy to adjust. Further, even when the changeover switch 18 is changed (that is, even when the mixing switch 16 is turned on or off), the level difference can be made small, so that no discomfort is caused.

In the embodiment shown in FIG. 3, the changeover switch 18 is used when the tape recorder and tuner are configured separately.
This shows the interlocking relationship between the mixing switch 16 and the mixing switch 16, which is performed indirectly here. That is, the mixing switch 16 is interlocked with a switch 20 connected to a power source 21, and energizes the solenoid coil 19 on the tape recorder side via the switch 20, thereby operating the changeover switch 18 in an electrode manner. By employing the relay switch system as described above, this mixing apparatus can be employed even if the tape recorder A and tuner B are separate units.

As detailed above, the present invention allows the level to be adjusted independently without raising the level of the tuner during mixing, makes it easy to match the level with other outputs such as a tape recorder, and can withstand the main volume. It is possible to use an electronic volume with a small input, and it also has practical effects such as a small level difference and no discomfort when changing the mixing switch.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing another example of a conventional mixing device, FIG. 2 is a circuit diagram of one embodiment of the present invention, and FIG. 3 is a circuit diagram of another embodiment. 1...Mixing amplifier, 2...Main volume, 3, 4...Amplifier, 5...Mixing volume, 6...Switch, 11...Mixing amplifier, 12...Volume, 15, 16...Mixing volume, 17 ...mixing amplifier,
18...Selector switch, 19...Solenoid coil, 20...Switch, 21...Power source.

Claims (1)

[Claims for Utility Model Registration] A mixing device that mixes and outputs a signal from a main source and a signal from another source, comprising: a first mixing amplifier into which a signal from the main source is input; a main volume that adjusts the level of the output from the first mixing amplifier; a second mixing amplifier into which the signal whose level has been adjusted by the main volume is input; a mixing switch connected in series with the other source; a changeover switch that operates in conjunction with the switch to input the signal from the other source to the first or second mixing amplifier via the mixing switch; and between the other source and the second mixing amplifier. and a connected mixing volume, and when the mixing switch is turned on,
The changeover switch is switched to the first mixing amplifier side, and the signal from the other source is directly input to the first mixing amplifier through the mixing switch and the changeover switch without going through the mixing volume, and the mixing switch When you turn off the
The changeover switch is switched to the second mixing amplifier side, so that the signal from the other source whose level has been adjusted by the mixing volume is input to the second mixing amplifier through the mixing switch and the changeover switch. A mixing device characterized in that it is configured as follows.