KR910004131Y1 - Stand-by circuit of remote receiver - Google Patents

Abstract

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Description

Standby circuit of remote receiver

1 is a conventional circuit diagram.

2 is a circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

100: transformer 200: bridge rectifier circuit

300,301: first and second constant voltage circuit unit 400: remote receiver

500: switching unit 600: flip-flop

Q1-Q7: Transistor C1-C10: Capacitor

R1-R10: resistor D1-D7: diode

ZD1, ZD2: Zener Diode 401: Optical Conversion Circuit

402: remote receiving circuit

The present invention relates to a standby circuit of a remote receiver capable of maintaining a standby state by applying a power supply to a remote receiver in a home appliance having a remote control circuit.

In general, a remote control circuit allows an operator to control a home appliance or a system of a production line at a remote controllable distance, which is divided into two parts, a remote transmitter and a remote receiver. The remote receiver of the remote control circuit is embedded in a home appliance or a production line system, and even when the home appliance or a production line system is turned off, the power is turned on or turned on by a remote control signal transmitted from a remote transmitter. The standby state, or standby state, should be maintained so as to generate a function control signal that turns off from the ON state and controls other functions.

A conventional circuit diagram for keeping the remote receiver in a standby state is shown in FIG.

1 is a main transformer 10 for converting the supply power input from the input terminals IN1 and IN2 into an operating voltage required by a main body to be controlled, and the main terminal 10 connected to the input terminal IN2. A relay 70 for switching the supply power applied to the transformer 10 according to the relay driving signal and a supply power of the input terminals IN1 and IN2 to be operated to operate the relay 70 and the remote receiver 40. A diode for rectifying and smoothing the output voltage of the sub-transformer 20 is connected between the sub-transformer 20 for providing a voltage and the sub-transformer 20 and the relay 70 and the remote receiver 40. D1), capacitor C1, and transistor Q1 for driving the relay 70 by inputting the relay drive signal of the output terminal OUT of the remote receiver 40 as a base.

Briefly describing the operation of FIG. 1, the remote receiver 40 and the relay 70 maintain a standby state by the operating voltage provided from the sub-transformer 20.

Here, the output voltage of the main transformer 10 is a voltage for operating the main body, it should be understood that the voltage greater than the voltage of the sub-transformer 20. The remote receiver 40 outputs a relay driving signal to the output terminal OUT according to a remote control signal input from an external remote transmitter (not shown). For convenience of explanation, when the output of the output terminal OUT is "high", the transistor Q1 is turned on and the relay 70 is turned on.

Accordingly, the supply power of the input terminals IN1 and IN2 is input to the main transformer 10, and the main transformer 10 provides an operating voltage required by the main body to be controlled. On the contrary, when the output terminal OUT of the remote receiver 40 is "low", the transistor Q1 is turned off and the relay 70 is turned off. Therefore, since the main power supply is not applied to the main transformer 10, the main body does not operate.

However, the above-described conventional circuit uses the relay 70 to control the supply power applied to the main body, and thus often causes contact failure and malfunction. Therefore, there was a problem that the relay 70 must be replaced during use, and the remote burden of having to separately provide a sub-transformer 30 to keep the relay 70 and the remote receiver 40 in a standby state at all times. Was hugging.

Accordingly, an object of the present invention is to provide a remote control circuit that can supply an operating voltage to a main body and a remote receiver using a single main transformer in a home appliance having a remote control circuit, and can use power supply control semi-permanently using a semiconductor device. To provide a standby circuit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a circuit diagram of the present invention, a transformer 100 for generating a predetermined AC voltage through a plurality of terminals of the secondary side coil N2 by inputting the AC supply power to two of the three terminals of the primary side coil N1. ) And a bridge rectifier circuit 200 connected between both output terminals OT1 and OT2 at the outermost sides of the secondary coil N2 of the transformer 100 for full-wave rectifying an AC voltage between the output terminals. The output of the bridge rectifying circuit 200 is smoothed by being connected between the output terminals of both ends of the bridge rectifying circuit 200 starting from the intermediate output terminal OT2 of the secondary coil N2 of the transformer 100. Capacitors C1 and C2 for generating the first and second DC voltages, and for maintaining and outputting the first and second DC voltages of the capacitors C1 and C2 at constant voltages according to the applied power supply control signals, respectively. 1-2 constant voltage circuit section 300, 301 and an external remote transmitter section And a remote control receiver 400 which inputs an optical signal to generate a single pulsed power supply control signal and other function control signals, and is connected to the remote receiver 400 so that a single pulsed power supply control signal is operated by the operator. A flip-flop 600 for generating a power supply control signal each time a switching unit 500 for generating a power supply signal is applied from the switching unit 500 or the remote receiver 400 and a single pulse; Rectifying and smoothing a predetermined AC voltage input from the fourth output terminal OT4 of the secondary side coil N2 of the transformer 100 to allow the remote receiver 400, the switching unit 500, and the flip-flop 600. Diodes (D5) and capacitors (C9) for applying an operating voltage to maintain the standby state, and transistors (Q5, Q6) for driving the 1-2 constant voltage circuit parts (300, 301) according to the power supply control signal, respectively. ) And the above A transistor Q7 is connected between the transistors Q5 and Q6 and the flip-flop 600 to control the transistors Q5 and Q6 according to the power supply control signal of the flip-flop 600. .

Hereinafter, the present invention will be described in detail based on the above-described configuration.

The transformer 100 has a first input terminal IT1 or a second input terminal common with the third input terminal IT3 among the input terminals IT1-IT3 of the primary coil N1 according to an external supply power. It inputs the commercial supply power of 115VAC or 230VAC through IT2) and outputs a predetermined AC voltage to the secondary coil N2 at a predetermined turns ratio.

The bridge rectifier circuit 200 connected between the outermost first output terminal OT1 and the second output terminal OT2 of the secondary side coil N2 of the transformer 100 includes the first and second outputs. The AC voltage output between the terminals OT1 and OT2 is full-wave rectified and output through the two lines 1 and 2.

The two capacitors C1 and C2 connected between the two lines 1 and 2 starting from the intermediate output terminal OT3 of the secondary side coil N2 of the transformer 100 are the bridge rectifier circuit 200. In addition, by acting as a smoothing circuit, the AC voltage on the two lines (1, 2) is converted into the first and second DC voltages of the pulse current component having the same absolute value of opposite signs.

The first constant voltage circuit unit 300 connected in parallel with the intermediate output terminal OT3 and the capacitor C1 of the secondary coil N2 of the line 1 and the transformer 100 has both ends of the capacitor C1. The first direct current voltage on the line 1, which is a voltage, is input to remove the pulsating components included in the first direct current voltage, and then output to the output terminal B + through the line 3. The capacitor C2 also has a second constant voltage circuit 301 connected in parallel with the capacitor C2 to an intermediate output terminal OT3 of the secondary coil N2 of the line 2 and the transformer 100. The second DC voltage on the line 2, which is the voltage at both ends of V, is input to remove the pulsating component included in the second DC voltage, and then output to the output terminal B- through the line 4.

Here, it should be understood that the 1-2 constant voltage circuit units 300 and 301 are selectively output according to the power supply control signal.

On the other hand, the diode D5 and the capacitor C9 rectifying and smoothing a predetermined AC voltage from the fourth output terminal OT2 of the secondary side coil N2 of the transformer 100 are operated by the diode D5. The AC voltage is half-wave rectified and smoothed by the action of the capacitor C9.

The output DC voltages of the diode D5 and the capacitor C9 are respectively supplied to the remote receiver 400, the switching unit 500, the flip-flop 600, and the collectors of the transistor Q7 to maintain the circuit in the standby state. Let's do it.

The switching unit 500 generates a single logic in a low logic state by the power switch SW1 every time the operator operates, inverts the inversion by the inversion element I1, and generates a power control signal in a high logic state. Output to line 6 via (D6). In addition, the remote receiver 400, which is in the standby state by receiving the output DC voltage on the line 5, receives a power control signal that is a single pulse in a high logic state whenever an optical signal for controlling power is input from the remote transmitter. It generates and outputs to the line 6, which describes the optical conversion circuit 401 converts the optical signal wirelessly input from the remote transmitter into an electrical signal and outputs it to the remote receiving circuit 402. The remote receiving circuit 402 generates the power control signal in a high logic state to a power control terminal SPT by processing the electrical signal according to logic logic, and outputs the power control signal to the line 6 through the diode D7.

Here, the remote receiving circuit 402 is composed of an IC which is an integrated circuit, and the optical conversion circuit 401 is often composed of a photo coupler.

Therefore, the power control signal applied to the line 6 is provided by the switching unit 500 or the remote receiver 400, which allows the operator to conveniently operate an external remote transmitter or an internal power switch SW1. Do it. Therefore, the flip-flop 600 for inputting the power control signal input to the line 6 to the clock terminal CLK has two inputs commonly connected to the line 5 each time the power control signal is applied. The power supply control signal in which the logic state of the output terminal Q is inverted by the high logic state of the terminal JK is applied to the base of the transistor Q7 through the resistor R10.

The flip-flop 600 operates as a JK flip-flop to turn off the transistor Q7 when the power supply control signal is input to the clock terminal CLK when the output terminal Q is "high". On the contrary, when the power supply control signal is input while being "low", the transistor Q7 is turned on. The capacitor C9 and the resistor R7 connected between the reset terminal R of the flip-flop 600 and the line 5 to form a differential circuit are initially subjected to differential pulses when a DC voltage is applied. Is generated and applied to the reset terminal R of the flip-flop 600 to initialize the flip-flop 600.

The transistor Q7 which inputs the power supply control signal from the output terminal Q of the flip-flop 600 through the resistor R10 is turned on or off in accordance with the logic state of the power supply control signal. The DC voltage on (5) is transmitted or interrupted on line (7).

Therefore, when the transistor Q7 is turned on or turned off, the transistors Q5 and Q6 connected thereto are also turned on or turned off to supply output voltages required by the main body connected to the first and second constant voltage circuit units 300 and 301. Or block. That is, the transistors Q7, Q5, and Q6 operate as solid state switch elements. The transistor Q5 forms a current path through the resistor R4 connected to the collector and the resistor R5 connected to the emitter when the DC voltage is applied on the line 7 to the first constant voltage circuit unit 300. By operating the transistor Q2 of), the DC voltage on the line 1 is supplied to the output terminal B + through the line 3.

On the other hand, when the transistor Q6 is turned on, the transistors Q3 and Q4 of the second constant voltage circuit unit 301 are sequentially turned on, and the DC voltage on the line 2 is supplied to the output terminal B−. Therefore, the supply power is applied to the main body to be controlled.

As described above, the present invention has the advantage that the lifespan can be semi-permanently extended by using the transistor to control the power on or off by using a transistor, and the operation power supply for the remote receiver, switching, flip-flop, etc. using only one main transformer. By supplying this, the standby state can be effectively maintained, and there is an advantage that a conventional subtransformer is not required.

Claims (1)

Transformer 100 for generating a predetermined AC voltage through a plurality of terminals of the secondary side coil (N2) by inputting the AC supply power to two of the three terminals of the primary side coil (N1), The bridge rectifier circuit 200 is connected between the outermost output terminals OT1 and OT2 of the secondary side coil N2 for full-wave rectification of the AC voltage between the output terminals, and the secondary side of the transformer 100. Generating first and second DC voltages connected between both output terminals of the bridge rectifying circuit 200 starting from the middle output terminal OT3 of the coil N2 to smooth the output of the bridge rectifying circuit 200. First and second constant voltage circuit units 300 and 301 for maintaining and outputting the capacitors C1 and C2 and the first and second DC voltages of the capacitors C1 and C2 at constant voltages according to the power supply control signal. Single pulse by inputting optical signal from external remote transmitter Remote receiver 400 for generating a power control signal and other function control signal of the state, and the switching unit 500 is connected to the remote receiver 400 for generating a power control signal of a single pulse type whenever the operator operates And a flip-flop (600) for generating the power supply control signal whenever a single pulse power control signal is applied from the switching unit (500) or the remote receiver (400). Rectifying and smoothing a predetermined AC voltage input from the fourth output terminal OT4 of the secondary side coil N2 of 100 to standby the remote receiver 400, the switching unit 500, and the flip-flop 600. A diode (D5) and a capacitor (C9) for applying an operating voltage to maintain the voltage, a transistor (Q5, Q6) for driving the first-second constant voltage circuit unit (300, 301) according to the power supply control signal, respectively; The transition And a transistor Q7 connected between the Q5 and Q6 and the flip-flop 600 to control the transistors Q5 and Q6 according to the power supply control signal of the flip-flop 600. Standby circuit of a remote receiver.