JPS61131206A - Signal selection system - Google Patents

Abstract

PURPOSE:To decrease the number of connections by selecting and outputting the reproduction output of a tape deck from a sound recording and reproducing terminal through a tape deck input/output terminal according to a control signal from the tape deck when the tape deck is placed in a reproducing state. CONSTITUTION:When the deck enters the reproducing state, a signal Low is outputted from a sound recording/reproducing changeover switch 20 and an F-F 3 is set through the differenting circuit consisting of resistances R5 and R6 and a capacitor C3, and a diode D7, so that an output is sent out of a speaker. At this time, F-Fs 1 and 2 are reset through diodes D4 and D1. In this state, when a selection switch 2 or 6 is pressed or when an external signal is applied to a terminal 3 or 7, the F-F 3 is reset through diodes D5 and D6, an inverter 27, and an NAND gate 28.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a signal selection system, and more particularly to a system that aims to reduce the number of connections between equipment equipped with recording (image) and playback functions and equipment that selects signals. Chiru.

[Prior art]

There is a configuration shown in FIG. 2 as a conventional general signal selection system.

In the figure, 31 is an input terminal for equipment other than the deck, 32
is the selection switch (non-lock) on the amplifier itself, and the resistor R□
, 124 A set signal is sent to the SR flip-flop F-F, , through the differentiator circuit of the capacitor CS, 34
Turn on the signal selector switch. At this time, diode D+1. +1 through the other flip-flop F −F,
, , , and turn off the signal changeover switch 38 or 42. Instead of operating the selection switch 32, the signal in the figure (active L
If you add ov), the operation will be exactly the same. (Other inputs are the same, so they are omitted) 43's output selector switch is 42
This operates in the opposite way to the tape signal changeover switch, and cuts off the oscillation loop. The signal from which one of the selection switches 34, 38, and 42 is selected is supplied to an amplifier 46 via a volume 45 and output to a speaker terminal.

When the changeover switch 34 or 38 is ON, the signal is output to the recording output terminal 44 via the output changeover switch 43.

On the other hand, to explain the deck, 48.49°50 is connected to the recording/playback switch and is connected to the a side during playback, and the signal detected by the head 47 passes through the playback amplifier 51 and is connected to the a side. Output to the output terminal. At this time, a low signal is output to the amplifier control terminal 57 at the same time as the reproduction by the switch 50, and the amplifier is switched to the tape. This signal continues until a state other than playback occurs. When recording, 53 is input from the 56 recording terminal via the 54 input
．． The signal is supplied to 47 heads through 52 recording amplifiers. Further, the output of the recording amplifier 53 is supplied to the terminal 55.

In such conventional devices, the terminals and connections for the recording input 56 and the recording output 44 are not used during deck playback, and the terminals and connections for the playback output 55 and the playback input 39 are used during recording. do not have.

〔the purpose〕

The present invention was made in order to eliminate the drawbacks of the conventional system, and an object of the present invention is to provide a system that can determine the operating state of a deck and reduce the need for separate recording and playback terminals and connections by consolidating them into one.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and the differences from the conventional example shown in FIG. 2 will be explained below.

Deck: The one corresponding to the recording terminal 56 in Figure 2 is removed, and the input signal is sent to the b side of the recording/playback switch 19 (recording amplifier 2
3 input side).

Amplifier: Remove the tape output selector switch 43° in Figure 2, which corresponds to the recording output 44, and connect the inverter 12 to the set input of the 7-rip 1-flop F-F3.
Differential circuit of resistor R11, #R capacitor C4, and diode D It D 4! : Add a diode D between the set inputs of FF3.

Additionally, 27 inverters that invert the signals of the diodes DII and D, and 28 NANDs whose inputs are the inverter outputs of 27.12 are added.

In this configuration, since the operation of the input system of the input signal terminals 1.5 is the same as that of the conventional example, the operation of the tape input/output system of the tape input/output terminal 9 will be omitted and will be explained.

Now, when the deck is in the playback state, a low signal is output from the recording/playback switch 20, and the flip-flops F and -F3 are set through the differential circuit of the resistor RIR & capacitor C3 and the diode D11, and the tape switching switch 13 is set. The switch is turned on and the output is output from the speaker.

At this time, the flip-flop F-Fl,2 is reset via the diode D4#Dot.

In this state, if you press the selection switch 2 or 6 or apply an external signal to terminal 3 or 7, it will pass through the flip-flop F-F3 via the diodes D, , D, the inverter 27, and the NAND gate 28. Reset. Therefore, the tape playback signal and other signals are not mixed. If the deck is in a state other than playback at this time, the output of the inverter 12 is Low, so the flip-flop F-F3 is It is not reset and the tape selection switch 13 is in the ON state, and other signals are sent via the switch 13 to the tape input/output terminal a → input/output terminal 25 → input volume 24 → recording amplifier 23 → recording amplifier 22 → recording/playback head 1
7.

Also, in the playback state, if another signal is selected, the flip-flop F
- When F3 is reset, the inverter 12. R
, , R%, C/) The flip-flop F-F3 is set again through the differentiating circuit to enable recording. Diode D1 is a signal to be set again, and is a diode to prevent flip-flops F-Fl and 2 from being reset.

Due to the above operation (1) The last selected signal is output from the speaker.

(2) When playing the deck, if other f is selected, the tape selection switch is OFF' (8) When other selections are made, if the deck is other than playback, the tape selection switch 13 is turned on It is possible to record and play back.

In the above embodiment, when the input of the deck playback poet is selected, the switch 13 is turned OFF and turned ON again when the state other than playback occurs, but a signal indicating that another input has been selected is not sent to the deck. If you supply it as a stop signal,
Diode D, inverter 12, 27, NAND gate 28, resistor R5R%, capacitor C, flip-flop 7
'F-F3, the tape changeover switch 13 becomes unnecessary.

〔effect〕

As described above, in the system of the present invention, the terminals of the ampoule deck may be a pair of terminals for both recording and playback, and there is only one wire connection.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional configuration. 1.5... Signal input terminal 2.6... Selection switch 3.7... External selection terminal 4.8... Signal selection switch 9... Tape input/output terminal 10... Tape selection switch 11...Tape external selection terminal 12...Inverter 13...Tape selection switch 14...Volume 15...Amplifier 16...Speaker terminal 17...Recording/reproduction head 1B, 19.20 ... Recording/playback switch 21... Playback amplifier 22.23... Recording amplifier 24... Input volume 25... Input/output terminal 26... Amplifier control terminal 27... Inverter 28... NAND gate

Claims (1)

[Claims] A tape having a signal selection means for selecting and outputting a plurality of input signals according to corresponding external control signals and internal operations, and a recording/playback function, and supplying one of the control signals to the signal selection means during playback. A signal selection system comprising a tape deck, wherein the signal selection means has one tape deck input/output terminal and one tape deck recording/playback terminal,
When these terminals are connected and the tape deck is switched to the playback state, the playback output of the tape deck is selected and output from the recording/playback terminal through the tape deck input/output terminal according to the control signal from the tape deck. , further comprising a control means for inputting the control signal or the input signal selected by the internal operation from the tape deck input/output terminal to the tape deck through the recording/playback terminal when the tape deck is switched to a recording state. signal selection system.