JPS6283210U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure shows a circuit diagram of a conventional microphone mixing device.
Fig. 3 is an explanatory diagram showing the relationship between the states of the first and second decks and the first to third output terminals of the control signal generation circuit, and Fig. 4 shows the relationship between the third output terminal of the control signal generation circuit and the high speed switch. FIG. 5 is an explanatory diagram showing the relationship between the first and second output terminals of the control signal generation circuit and the first changeover switch, and FIG. 6 is an explanatory diagram showing the relationship between the microphone switch and the fifth output terminal. FIG. 6 is an explanatory diagram showing the relationship between the third and fourth output terminals of the signal generation circuit and the second changeover switch. Explanation of main drawing numbers, 21...First magnetic head, 2
2...First reproduction amplifier, 23...Second magnetic head, 24...Second reproduction amplifier, 25...Noise reduction circuit, 26...Function changeover switch, 2
7...Switching control circuit, 29...Microphone, 30...Mic amplifier, 31...Mixing volume, 32...Microphone output selection switch,
34 ... Output circuit, 37... Recording amplifier, 38...
...First changeover switch, 39...Second changeover switch, 40...Control signal generation circuit.

Claims (1)

[Scope of utility model registration request] The first deck includes at least a first deck having a playback function and a second deck having a recording function.
In an audio device having a function changeover switch that selects a playback signal from a deck and another source signal, the function switch is operated when the function changeover switch is switched, and the function is changed according to the operation of the function switch. a switching control circuit that controls switching of the switching switch and generates a control signal when the reproduction signal of the first deck is selected by operating the function switch; and a microphone that amplifies the microphone signal obtained from the microphone. an amplifier, a mixing means for mixing the output signal from the microphone amplifier and the source signal selected by the function switch, an output circuit for monitoring the signal generated by the mixing means, and a reproduction of the first deck. a first detection means for detecting a dubbing state in which a signal is recorded on a second deck; a second detection means for detecting a state in which a microphone is connected to the microphone amplifier; a control signal for the control circuit; It is switched in accordance with the detection output of the first detection means and the detection output of the second detection means, and when it is switched to the first position, the reproduction signal of the first deck is switched to the first position, and when it is switched to the second position, the reproduction signal of the first deck is switched. and switching means for supplying the input signals of the output circuits to the recording amplifiers of the second deck, respectively, and in the dubbing state and the microphone connected to the microphone amplifier, the function changeover switch switches the reproduction signal of the first deck to the recording amplifier of the second deck. When selected, the switching means is switched to the first position so that a mixed signal of the playback signal of the first deck and the output signal from the microphone amplifier can be recorded on the second deck, and the function selection switch is switched to the first position. When a source signal other than the first deck is selected, the switching means is switched to the second position so that only the playback signal of the first deck can be recorded on the second deck, and the source signal selected by the function changeover switch is switched to the second position. and an output signal from the microphone amplifier can be supplied to the output circuit.