KR890003434Y1 - Multi-sound mode converter for television - Google Patents

Abstract

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Description

TV's voice multimode switching circuit

The accompanying drawings are circuit diagrams of the present invention.

* Explanation of symbols for main parts of the drawings

1: output unit 2: voice multi-use IC

3: First state part 4: Second state part

5: Initial value setting part TA ₁ -TA ₃ : Tact switch

Q ₁ -Q ₁₀ : Transistor R ₁ -R ₁₅ : Resistance

C: Capacitor D ₁ -D ₈ : Diode

The present invention relates to a circuit capable of switching a voice multiple mode by using a tack switch in a television for a voice multiple mode.

As described above, in order to switch the multiplexed voice receiving mode of a television, it has been conventionally performed by a switching circuit using a push switch. There was a disadvantage.

An object of the present invention is to solve the above drawbacks, it is designed to be able to switch the voice multiple mode by using a convenient tack switch or a remote control. In other words, by combining two status circuits using a monostable multivibrator, the output unit can output a function switching signal from the output unit to the voice multiple custom IC according to the operation of the tack switch or the remote controller. Hereinafter, the configuration, operation and effects of the present invention will be described in detail by the accompanying drawings.

Monostable multi-stage transistors (Q ₆ ) (Q ₇ ) and transistors (Q ₅ ), resistors (R ₅ -R ₁₀ ), diodes (D ₃ ) and LEDs for mode display (LD ₁ ) ), And the second state part 4 is composed of a monostable multi transistor (Q ₈ ) (Q ₉ ), a resistor (R ₁₁ -R ₁₄ ), and a mode display LED (LD ₂ ) (LD ₃ ). The output unit 1 is composed of transistors Q ₁ -Q ₄ and resistors R ₁ -R ₄ , and the bases of the transistors Q ₃ and Q ₄ are respectively diodes D ₁ (D ₂ ). After passing through, the first state portion 3 is coupled to the collector of the transistor Q ₅ , and the collector of the transistor Q _{1 is} connected to the collector of the transistor Q ₈ in the second state portion 4. The base of the transistor Q _{6 in} the first state part 3 is connected to one end of the tack switch TA ₁ having the other end grounded through the diode D ₄ , and the base of the transistor Q ₇ is connected. a diode (D ₇₎ are grounded after Show location other end through _{(D 8) (TA 2)} (TA 3) To one end of each connection and at the same time the diode (D _5), (D ₆₎ via first and make connection to the respective bases of the transistors (Q ₈₎ (Q ₉₎ in the two-state portion (4), of the An initial value setting part 5 consisting of a transistor Q ₁₀ , a resistor R ₁₅ , and a capacitor C is connected to a connection point of a diode D ₆ and D ₈ , wherein B ⁺ denotes a DC power source. The supply terminal, 2, is a custom IC for voice multiple mode, and IN is a function switching signal input terminal a, b, c, d, e, f of each of the voice multiple custom IC 2. The voice multiple custom IC 2 functions as three signals are input to its input terminal IN, i.e., a 'low' level (ground), an open state, or a 'high' level (B ⁺ voltage). (Function) is switched to the state of the main signal main, the sub-signal sub, or the main / sub-signal main / sub.

First, when B ⁺ power is supplied to the arc of the present invention, the capacitor C ₁ in the initial value setting section 5 is initially in a short-circuit state, so that the transistor Q ₁₀ is 'on' and the potential at the point e is 'low'. 'Become a level. Therefore, the 'low' level pulse is supplied to each of the state parts 3 and 4 through each diode D ₆ and D ₈ so that the points a and c become 'low' levels, whereby each transistor Q ₇ By turning off (Q ₉ ), the potentials at points b and d become 'high' levels.

In this state, when the capacitor C is completely charged, the base voltage of the transistor Q ₁₀ becomes 'high' level, so that the transistor Q ₁₀ is 'turned off' and then the first and second state parts ( 3) (4) is not affected, and this state is the same as the state in which the tack switch TA ₃ is pressed (described later).

In this state, when the tack switch TA ₁ is pressed, the 'low' level pulse is input to the base of the transistor Q _{6 in} the first state part 3 through the diode D ₄ so that a point becomes a 'high' level. As a result, since the transistor Q is 'on', the point f becomes 'low' level, so that each transistor Q ₃ (Q ₄ ) in the output unit 1 is 'off' and its output is open. Is input to the input terminal IN of the voice multiple custom IC 2. Therefore, the function of the voice multiplex custom IC 2 is switched to the sub-signal input mode.

On the other hand, when the tack switch TA ₂ is pressed, a 'low' level pulse is input to each of the state units 3 and 4 through the diode D ₅ and D ₇ , whereby the first state unit ( The low level is input to the base of the transistor Q ₇ in the transistor 3), and the transistor Q ₇ is turned off so that the point a becomes the low level, that is, the ground, and the point f becomes the high level. Therefore, the circuit of this first state portion 3 does not affect the transistors Q ₃ and Q ₄ in the output portion 1.

On the other hand, since the 'low' level is also input to the base of the transistor Q ₈ of the second state part 4, the transistor Q ₈ is 'off' so that the point C becomes a 'high' level. Thus, transistor Q ₁ in output ₁ is 'turned on', thereby 'on' to transistor Q ₂ , whereby each transistor Q ₃ (Q ₄ ) is also 'on' and The output goes to the 'low' level, or ground, and is input to the input terminal IN of the voice multiple custom IC 2. Therefore, the function of the voice multiplex custom IC 2 is switched to the main signal input mode.

Finally, when the tack switch TA ₃ is pressed, a 'low' level pulse is input to each of the state units 3 and 4 through each diode D ₆ and D ₈ , thereby providing a first state unit 3. Transistor Q _{7 in} < RTI ID = 0.0 > off < / RTI > The circuit has no influence on transistor Q ₃ (Q ₄ ) in output 1.

On the other hand, since the 'low' level pulse is input to the base of the transistor Q _{9 in} the second state part 4 through the diode D ₆ , the point C is grounded and the transistor Q ₁ in the output part 1 is grounded. ) Is 'off'. Transistor Q ₂ is thus 'off', whereby transistor Q ₃ is in the 'on' state, transistor Q ₄ is in the 'off' state, and its output is at the 'high' level (B ⁺ voltage). By inputting to the input terminal of the voice multiple custom IC 2, it switches to the function main / sub-signal simultaneous mode.

On the other hand, each of the SED (LD ₁ -LD ₃ ) in the first and second state parts (3) (4), the LED corresponding to the respective functional mode as described above is emitted to visually display the current mode, The circuit of the present invention performs the same operation by the remote controller circuit having the same signal form as the signal input by the tack switch TA ₁ -TA ₃ , thereby enabling voice multiple mode switching by the remote controller.

As described above, the present invention enables the switching of the voice multiple mode by the tack switch or the remote control by a simple circuit configuration, and is a useful design that can achieve high-quality products as well as convenience of use.

Claims (1)

Monostable multi-stage transistors (Q ₆ ) (Q ₇ ) and transistors (Q ₅ ), resistors (R ₅ -R ₁₀ ), diodes (D ₃ ) and LEDs for mode display (LD ₁ ) ), And the second state part 4 is composed of the monostable multi-switch transistors Q ₈ (Q ₉ ), the resistors R ₁₁ -R ₁₄ , and the mode display LEDs LD ₂ LD ₃ . The output unit 1 is composed of transistors Q ₁ -Q ₄ and resistors R ₁ -R ₄ , and the bases of the transistors Q ₃ , Q ₄ are respectively diodes D ₁ (D). ₂ ) and then to the transistor Q ₅ and the collector in the first state part 3, and the collector of transistor Q ₁ to the transistor Q ₈ in the second state part 4. The base of the transistor Q _{6 in} the first state part 3 is connected to one end of the tack switch TA ₁ having the other end grounded through the diode D ₄ , and connected to the collector Q _{7 of the} transistor Q ₇ . After the base is through the diode (D ₇ ) (D ₈ ) and the other end of the tack switch (TA ₂ ) (TA ₃ ) At the same time as connecting to each end, through the diode (D ₅ ) (D ₆ ) to the respective base of the transistor (Q ₈ ) (Q ₉ ) in the second state part 4, the diode (D ₆₎ And an initial value setting section (5) consisting of a transistor (Q ₁₀ ), a resistor (R ₁₅ ), and a capacitor (C) at a connection point of the (D ₈ ).