KR200161112Y1 - Control circuit of Audio multiplexer mode - Google Patents

Abstract

This invention is to control mono, stereo, and bilingual broadcasting of voice multi module even if only two ports are used to control voice multi module using micom.

The signal level applied to the two terminals of the audio multiple module becomes the opposite of the mono, stereo, and bilingual broadcasts. Therefore, the output of one port of the microcomputer is applied to the audio multiple module as it is, and is reversed. .

The present invention is made by applying the two port outputs of the microcomputer to the terminals of the voice multiplexing module as it is, but inverting the output of one port of the microcomputer to the inverting device and then applying it to the remaining terminals of the audiomultiplexing module.

Description

Control circuit of Audio multiplexer mode

The present invention controls the voice multiplexing module by using the microcomputer, so that it is possible to control the mono, stereo and bilingual broadcasting of the multiplexing audio module by using only two microcom ports. To control multiple modules.

Terminals (M ₀₎ in the past, as shown in Figure 1 the microprocessor 10 terminals (M _0), (M ₁₎ (M ₂₎ of the output as the corresponding state multiplex module 20 of (M ₁₎ It is configured to be applied to the (force) and the voice multiplexing module 20 according to the signal level applied to the terminal (M ₀ ) (M ₁ ) (force) mono, stereo, bilingual (SAP) broadcasting as shown in the table below To control.

M ₀ M ₁ force MONO 0 One One STEREO 0 One 0 SAP One 0 0

The terminal of the microcomputer _{(10) (M 0) (} M 1) (M 2) and the terminal of the audio multiplexing module _{(20) (M 0) (} M 1) (force) is therefore enables the connection to the corresponding state eventually microcomputer The same control signal as the above table should also be output from terminals M ₀ and M ₁ and M ₂ of (10).

However, as the utilization of the microcomputer 10 is gradually increased, it is difficult to use the limited port of the microcomputer 10, so that the number of ports of the microcomputer 10 needs to be reduced.

The present invention is to reduce the number of ports of the microcomputer by using two ports of the microcomputer instead of controlling the voice multiplex module that requires three input terminals using the microcomputer's three ports.

It is conceived that the signal level applied to the two terminals of the voice multiple module becomes the opposite of the mono, stereo, and bilingual broadcasting, so that one port output of the microcomputer is applied to the voice multiple module as it is and inverted. .

The present invention applies the two port outputs of the microcomputer to the input terminal of the voice multiple module as it is, but inverts the output of one port of the microcomputer to the inverting device and then applies it to the remaining input terminals of the voice multiplex module. This is done by selecting the inputs of which two terminal inputs of opposite are applied and applying one terminal as it is and inverting the other terminal.

1 is a conventional voice multiple control circuit

2 is a voice multiple control circuit of the present invention

[Explanation of symbols on the main parts of the drawings]

10: micom 20: voice multiple module

Q ₁ : Transistor

2 is a circuit diagram of an embodiment of the present invention,

Terminal of microcomputer 10 (M _0), (M ₁₎ output is respectively applied as the terminal (force) (M ₀₎ of the audio multiplexing module 20 inverts the terminal (M ₁₎ output from the microcomputer 10, the device After inverting the configuration is configured to be applied to the terminal (M ₁ ) of the voice multiplex module 20.

The inverting device is a switching transistor formed of a (Q _1), the power to the collector of the microcomputer 10, the terminal (M ₁₎ of the output transistor (Q ₁₎ sikimyeo applied to the base emitter grounded transistor (Q ₁₎ of the ( Vcc) is applied while the terminal M ₁ of the voice multiplexing module 20 is connected.

In the present invention configured as described above, the microcomputer 10 should output a logic level signal as shown in Table 1 below to the terminal M ₀ (M ₁ ) according to the control condition of the voice multiplex module 20.

Table 1

MONO STEREO SAP M ₀ H L L M ₁ L L H

And the voice multiplexing module 20 is controlled according to the signal level applied to the terminal (M ₀ ) (M ₁ ) (force) as shown in Table 2 below.

TABLE 2

MONO STREO SAP M ₀ 0 0 One M ₁ One One 0 force One 0 0

The operation of the present invention will be described by confirming that the signal is applied to the voice multiplexing module 20 as shown in Table 2 according to the output state of the microcomputer 10 as shown in Table 2.

First, when the mono control outputs the high level and the low level to the terminals M ₀ and M ₁ of the microcomputer 10 as shown in Table 1, the force of the voice multiplex module 20 is the high level and the terminal M _0. ) Is applied at a low level, and the low level output from the terminal M ₁ of the microcomputer 10 is inverted at the transistor Q ₁ to apply a high level to the terminal M ₁ of the voice multiplexing module 20. Therefore, it is same as mono control condition of table 2.

When the stereo control outputs all low levels to the terminals M ₀ and M ₁ of the microcomputer 10 as shown in Table 1, the terminals of the voice multi-module 20 and the terminals M ₀ are all low level. The low level output from the terminal M ₁ of the microcomputer 10 is inverted by the transistor Q ₁ to apply the high level to the terminal M ₁ of the voice multiplexing module 20. Same as stereo control condition.

In addition, when controlling the bilingual broadcasting (SAP), if the low level and high level are output to the terminals M ₀ and M ₁ of the microcomputer 10 as shown in Table 1, the force of the voice multiple module 20 is low. The level and the terminal M ₀ are applied at a high level, and the high level output from the terminal M1 of the microcomputer 10 is inverted by the transistor Q _{1 to be} connected to the terminal M ₁ of the voice multiplex module 20. Since low level is applied, it is same as bilingual broadcasting control condition of table 2.

Thus the two terminals of the microcomputer _{(10) (M 0) (} M 1) 3 gae terminal of the audio multiplexing module 20 using the (force) (M _0), (M ₁₎ to control the input mono, stereo, 2 Since the national broadcast control is possible, one port of the microcomputer 10 can be reduced.

The present invention can reduce the output port of the microcomputer to control the multiplex module by one can increase the utilization of the microcomputer output port.

Claims (2)

In the voice multiplex module performing the voice multiple control by a control signal applied to the three terminals in the microcomputer, The two port outputs of the microcomputer are applied to the input terminal of the voice multiplex module as it is, and the one of the two port outputs of the microcomputer is inverted by the inverting element, and the multiplex audio control is applied to the remaining input ports of the audio multimodule. Circuit. The voice multiplex control circuit of claim 1, wherein the terminal input of the voice multiplex module, which is directly applied with the output of the microcomputer, and the audio multiplex module which is applied by inverting the output of the microcomputer with the inverting device, have an opposite input level.