KR890006039Y1 - A voltage supplier - Google Patents

Abstract

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Description

Power supply

1 is a circuit diagram of the device of the present invention.

* Explanation of symbols for main parts of the drawings

1: function selector 2: tuner

3: compact disc deck portion 5: deck portion

6: main amplifier 7: speaker

9: tuner power control unit

The present invention relates to a power supply for an audio mixing set, and more particularly to a power supply for supplying power only to selected portions.

Conventionally, in an audio mixed set in which a radio, a cassette recorder, a turntable, and a deck unit are installed at the same time, only the processing signals are switched while the power is applied to all devices, so that the power is always supplied to the entire circuit regardless of the function selection switch. In addition to unnecessary power consumption, the parts that are not needed for each function, for example, when the phono function of the turntable is selected, the interference between the radio and the tuner deck, the cassette deck, and the compact disc are generated simultaneously, causing noise. There are disadvantages.

In order to solve the above disadvantages, the present invention supplies power only to selected parts of the audio mixing set, thereby controlling unnecessary power consumption and avoiding mutual interference between the parts. An object of the present invention will be described below with reference to the accompanying drawings, the configuration and effect of the present invention.

Referring to FIG. 1, the device of the present invention includes a function selector 1, a tuner unit 2, a compact disc deck unit 3, a phono unit 4, a deck unit 5, and a main amplifier 6 and a speaker 7 ) audio according to the mixed set of system, the function selector transistor function selection display terminal (L _C, L _T) of the (1) through an inverter (G _3, G ₄ and G _1, G ₂₎ (TR _3, consisting of TR ₄ ) Zener diode (ZD ₂ ) Negative power control section 8 of the compact disc deck consisting of resistors R ₅ and R ₉ and capacitor C ₃ , transistors TR ₅ and TR ₆ and zener diode ( ZD _a ) are connected to the tuner power supply control unit 9 each consisting of _a resistor (R ₁₀ -R ₁₂ ) and a capacitor (C ₄ ), and the function selection display terminal (L _C ) is connected through an inverter (G ₃ -G ₅ ). The transistors Tr ₁ and Tr ₂ are connected to the positive power control unit 10 of the compact disc deck including the zener diode ZD ₁ , the resistors R ₅ -R ₇ , and the capacitor C ₂ . The effect of the configuration of the present invention is the power source ( When B ⁺ ) is supplied, if the user selects one of the function selector switches SW ₁ -SW ₄ of the function selector 1 and turns it on, the function selection display terminals L _T and L _{C of} the function selector 1 are turned on. One terminal selected from among, L _P , and L _D goes low to emit any one of the LEDs D ₁ -D ₄ . The function selection display terminals L _T , L _C , L _P , L _D are terminals that go low when the tuner section, the compact disc deck section, the phono section, and the line deck section are selected, respectively.

However, the function selector switch (SW ₁ -SW ₄₎ of the tuner selection switch (SW _1), the capacitor (C ₁₎ that there is connected in parallel, the first power supply is switched on unconditional tuner unit (2) is selected. In this case, when the power is first turned on, the capacitor C ₁ is in a conductive state, and thus the function selection display terminal LT becomes low. Accordingly, the output of the inverter G ₂ becomes low and the transistor TR ₆ becomes low. The base of transistor) is not applied to the bias voltage, so that the transistor TR ₆ is turned off. Accordingly, since the constant voltage of the zener diode ZD ₃ is applied to the base of the transistor TR ₅ as a bias potential, the tuner unit 2 The constant voltage is applied to the power supply. However, since the selection terminal L _C is kept in a high state, the inverters G ₃ and G are provided in the transistors TR ₂ and TR ₄ of the + power control unit 10 and the −power control unit 8 of the compact deck unit ₃ . _{Since the} 'low' and 'high' potentials are applied through ₄ , G ₅ and G ₃ , G ₄ , respectively, the transistors TR ₂ and TR ₄ remain in the conduction state and accordingly the transistors TR ₁ and TR ₃ Since the base becomes a low potential, the transistors TR ₁ and TR ₃ are turned off. Therefore, interference between the tuner portion 2 and the compact disc deck portion 3 can be reliably avoided. In addition, when the user turns on the function selection switch SW ₂ , the function selection display terminal LC is kept low, and a high potential is applied to the base of the transistor TR ₂ of the (+) power control unit 10. The low potential is applied to the base of the transistor TR ₄ of the negative power supply control unit 8 so that the transistors TR ₃ and TR ₄ are turned off, and thus the transistors TR ₁ and TR ₂ become Zener diodes ( The conduction state by the constant voltage by ZD ₁ and ZD ₂ is maintained and + and-power are supplied to the compact disc deck part 3.

The function selector 1 allows the corresponding function unit to be applied to the main amplifier 6 according to the selected function. In addition, in the present device, the phono unit 4 and the deck unit 5 are always supplied with power, but the phono unit 4 is normally controlled by the arm switch of the turntable, so that power control is unnecessary and the deck unit (5) may record the operation of other parts, so it is well known that power should be supplied.

As described above, power can be applied to the minimum circuit stage according to the function selected by the present invention, thereby reducing unnecessary power consumption and completely eliminating mutual interference.

Claims (1)

In an audio mixing set system consisting of a function selector, a tuner section, a compact disc deck section, a phono section, a deck section and a main amplifier and a speaker, the function selection display terminals L _C and L _T of the function selector 1 are reversed. G _3, G ₄ and G _1, the transistor through the _{G 2) (TR 3, TR} 4) a Zener diode (ZD _2), resistance (R _S, R ₉₎ and a capacitor (C ₃₎ a compact disc deck portion consisting of ( -) Connected to a power supply control unit 9 and a tuner power supply control unit 9 each consisting of transistors TR ₅ and TR ₆ , zener diodes ZD ₃ resistors R ₁₀ and R ₁₂ and a capacitor C ₄ , respectively. The function selection display terminal (L _c ) is connected to the transistors (Tr ₁ , Tr ₂ ), zener diode (ZD ₁ ) resistors (R ₅ , R ₇ ) and capacitor (C ₂ ) through the inverter (G ₃ -G ₅ ). A power supply unit connected to the positive power control unit 10 of the configured compact disc deck unit.