JPH09215227A - Sensing circuit of remote control signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a delay time enough using small-sized lightweight parts, by making the unoperated states of controlled systems controllable using the output of a semiconductor device turned on when the terminal voltage of a capacitor is increased to a predetermined value. SOLUTION: When a switch 14 of a remote controller 12 is closed to send a control signal V1, a capacitor 16 of a sensing circuit 15 is charged gradually via a resistor 17. Then, when a terminal voltage V2 of the capacitor 16 exceeds the summed voltage of the Zener voltage of a Zener diode 19 and the voltage between the base and emitter of a transistor 20, the transistor 20 connected in series with respective delay voltage sensing circuits 7 of controlled systems 5A, 5B is turned on to send a delay voltage V3 to the circuits 7. Therefore, turning on respective transistors 11 after a delay time, required operating voltages V4, V5 of controlled circuits 6, 6 become low levels to make the stopped states of the controlled systems 5A, 5B controllable. As a result, using small-sized light parts, a delay time can be secured enough.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control signal detecting circuit for remotely controlling a controlled device such as a power supply device or an electronic device from an operating state to a non-operating state by a control signal (electrical signal). Is.

[0002]

2. Description of the Related Art Controlled devices such as power supply devices and electronic devices are
When remotely controlling from the ON state to the OFF state by the control signal of the electric signal, in order to prevent malfunction due to external noise or electric signal of other devices, and malfunction due to generation of electric signal for a short time due to human error, A remote control signal detection circuit including a delay circuit is provided on the control device side to detect whether or not an electric signal is continuously sent for a predetermined time, and if the electric signal is a predetermined time, the control signal is a control signal. It is determined that the controlled device is controlled from the on state to the off state. This conventional remote control signal detection circuit and controlled device are shown in FIG. In FIG. 5, 1 is a detection circuit,
It is composed of a capacitor 2 and resistors 3 and 4. 5
Is a controlled device and is a controlled circuit 6 such as a power supply device or an electronic device.
And a delay voltage detection circuit 7 including resistors 8, 9, a Zener diode 10, a transistor 11 and the like. Reference numeral 12 is a remote control device, which includes a power supply 13, a switch 14, and the like. V1 is a control signal sent from the remote control device 12 and having a required voltage for stopping the operation of the controlled device 5, V2 is a terminal voltage (charging voltage) of the capacitor 2, and V3 is a delay voltage of the output of the detection circuit 1. Which is equal to the terminal voltage V2 of the capacitor 2. V4 is the output voltage of the control circuit 5.

The operation of the conventional circuit shown in FIG. 5 will be described. First, when the controlled device 5 is in the operating state, that is, when the switch 14 of the remote control device 12 is in the off state, the control signal V1 is not applied to the detection circuit 1, so that the terminal voltage V2 of the capacitor 2 and the detection circuit are detected. 1 output delay voltage V
3 is a low level. Therefore, since the transistor 11 of the delay voltage detecting circuit 7 is in the off state, the output voltage V4 of the delay voltage detecting circuit 7 holds the operating voltage of the controlled circuit 6. Next, in order to control the controlled device 5 to the inoperative state, the switch 14 of the remote control device 12 is turned on, and the control signal V shown in FIG.
1 is applied, the capacitor 2 is charged through the resistor 3, and its terminal voltage V2 rises with a time constant as shown in FIG. 6 (b).

On the other hand, the delay voltage detection circuit 7 of the controlled device 5
Then, the sum of the Zener voltage of the Zener diode 10 and the base-emitter voltage of the transistor 11 is used as the detection level of the control signal. Therefore, when the delay voltage V3 output from the detection circuit 1 (equal to the terminal voltage V2 of the capacitor 2) reaches the detection level of the delay voltage detection circuit 7, the transistor 11 is turned on and the required operating voltage V4 of the controlled circuit 6 is reached. Becomes low level as shown in FIG. 6 (c), and the controlled device 5 is controlled to a stopped state. That is,
After the control signal (electrical signal) V1 is continuously sent from the remote control device 12, after the delay time T1 shown in FIG. Since the controlled device 5 is turned off by detecting this, even if a sporadic electric signal such as an external noise or a signal of another device is applied to the detection circuit 1, it is not mistakenly recognized as a control signal. I have to.

[0005]

However, in this conventional example, in order to perform the operation of the delay voltage detection circuit 7 of the controlled device 5 stably, the capacitance of the capacitor 2 is increased and the capacitance is increased. It was necessary to make the resistance value of the resistor 3 relatively small and shorten the delay time as shown in FIGS. 6 (b) and 6 (c). That is, in this conventional example, the terminal voltage V2 of the capacitor 2 is as it is, the delay voltage detecting circuit 7
Has been applied. Therefore, the resistance value of the resistor 3 is increased to increase the delay time to about 1 second.
When the capacitor 2 is slowly charged as shown in (d), the terminal voltage V2 of the capacitor 2 rises, so that FIG.
After the delay time T elapses as shown in (e), the transistor 11 is turned on, but the terminal voltage V2 of the capacitor 2 is lowered by the turning on of the transistor 11 and the transistor 11 is turned off again, whereby the capacitor 2 is turned on again. The phenomenon that the terminal voltage V2 rises and the transistor 11 turns on is repeated until the capacitor 2 is sufficiently charged. As shown in FIG. 6 (e), the output voltage V4 of the control circuit 5 has a sawtooth shape. There is a problem that the controlled device 5 cannot be stably controlled to the inoperative state. Therefore, in the conventional circuit, it is possible to extend the delay time to some extent by using a large-capacity capacitor so as to prevent malfunction due to signals such as external noise, but to further prevent malfunction, the delay time is increased. It was difficult to delay to about 1 second. The present invention provides a remote control signal detection circuit that can secure a sufficient delay time by using small and lightweight components.

[0006]

The first invention of the present application is to control a controlled device such as a power supply device or an electronic device from an operating state to a non-operating state by a control signal from a remote control device. Whether or not the signal continues for a predetermined time is detected by a detection circuit equipped with a capacitor and a resistor, and when the control signal continues for a predetermined time, the controlled device does not operate due to the delay voltage output from the detection circuit. In a remote control signal detection circuit for controlling the state, a series circuit of the capacitor and the resistor is provided in parallel in the remote control device, and is turned on when the terminal voltage of the capacitor according to the control signal rises to a predetermined value. An operating semiconductor element is provided in series with the controlled device, and the output of the semiconductor element controls the controlled device to an inoperative state.

According to a second aspect of the present invention, when controlling a controlled device such as a power supply device or an electronic device from an operating state to a non-operating state by a control signal from a remote control device, the control signal continues for a predetermined time. Whether or not it is detected by a detection circuit including a capacitor and a resistor, and when the control signal continues for a predetermined time, the controlled device is controlled to an inoperative state by a delay voltage output from the detection circuit. In the remote control signal detection circuit described above, the remote control device is provided with the series circuit of the capacitor and the resistor in parallel, and the first semiconductor is turned on when the terminal voltage of the capacitor according to the control signal rises to a predetermined value. An element is provided in series with the controlled device, and a second semiconductor element that is turned on by an operation output of the first semiconductor element is provided in an operation circuit of the first semiconductor element; The operation of the second semiconductor element at the output of the first semiconductor device rise is steep on-operation, the controlled device is obtained so as to control inoperative.

[0008]

FIG. 1 shows a basic circuit of a remote control signal detecting circuit 15 of the present invention.
It is composed of a capacitor 16, resistors 17 and 18, a Zener diode 19, and a switching transistor 20. Further, controlled devices 5A and 5B having the same circuit configuration as the controlled device 5 shown in FIG. 5 are provided in parallel, and a plurality of controlled devices 5 are controlled by the same control signal. Note that the same parts as those in FIG. The operation of the circuit of FIG. 1 will be described. First, when the control signal is not sent from the remote control device 12, that is, when the switch 14 is in the off state, the control signal V1 is not applied to the detection circuit 15, so that the delay voltage V3 of the output of the detection circuit 15 is It is a low level. Therefore, the controlled device 5
Each of the transistors 11 of A and 5B is in the off state, and the required operating voltages V4 and V5 of the controlled circuit 6 are maintained.

Next, when the switch 14 of the remote control device 12 is turned on and the control signal V1 shown in FIG. 2 (a) is sent, the capacitor 16 of the detection circuit 15 passes through the resistor 17 as shown in FIG. 2 (b). It will be charged slowly as shown in. When the terminal voltage V2 of the capacitor 16 rises above the sum of the Zener voltage of the Zener diode 19 and the base-emitter voltage of the transistor 20, it is connected in series to the delay voltage detection circuit 7 of the controlled devices 5A and 5B. The transistor 20 is turned on, and the delay voltage V3 shown in FIG. 2 (c) is sent out. Therefore, each transistor 11 of the controlled devices 5A and 5B is turned on with a delay time T from the time when the detection circuit 15 receives the control signal V1 to the time when the transistor 20 is turned on, as shown in FIG. As shown in FIG. 5, the required operating voltages V4 and V5 of the controlled circuit 6 which have been maintained until then become low level, and the controlled devices 5A and 5
B is controlled to a stop state.

As described above, according to the present invention, the controlled device 5A,
The delay voltage V3 that controls the operation of 5B is
Of the control signal V1 is also a sufficiently large current capacity applied through the transistor 20 operated by the rise of the terminal voltage V2 of the capacitor 16. Therefore, the delay voltage V3, which is the output of the detection circuit 15, does not change due to the operation of each transistor 11, and each transistor 11 operates stably. Further, as is clear from the above, the capacitor 16 can increase the resistance value of the resistor 3 to the extent that the operating state of the transistor 20 can be maintained, so that the capacitance thereof can be reduced and the detection circuit 15 It is possible to reduce the size and weight.

However, in the configuration of the detection circuit 15 of FIG. 1 described above, the base current of the transistor 20 depends on the loose charging characteristic of the capacitor 16, so that the transistor 20 gradually turns on and delays. The voltage V3 has a waveform whose rising edge is slightly gentle as shown in FIG.
Therefore, when a plurality of controlled devices 5 are connected to be controlled at the same time, for example, due to the difference in the detection characteristics due to the variation in the electric characteristics of the respective components forming the delay voltage detection circuits 7 of the controlled devices 5A and 5B, for example, , The transistor 1 of the delay voltage detection circuit 7 of the controlled device 5A as shown in FIG.
1 performs the ON operation before the transistor 11 of the delay voltage detection circuit 7 of the controlled device 5B, each controlled circuit 6
Of the operating voltages V4 and V5 of the
May occur.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a detection circuit which does not cause a time difference in the operations of the controlled devices 5A, 5B, ... Even when simultaneously controlling a plurality of controlled devices 5 as described above will be described with reference to FIG. The detection circuit 21 in the embodiment shown in FIG. 3 is obtained by providing the detection circuit 15 of FIG. 1 with resistors 22, 23, 24 and a transistor 25. In this circuit, when the control signal V1 is sent from the remote control device 12 to the detection circuit 21, the capacitor 16 is slowly charged through the resistor 17 as shown in FIG. To be done. Then, the terminal voltage V2 of the capacitor 16 rises above the sum of the Zener voltage of the Zener diode 19 and the base-emitter voltage of the transistor 20 and the transistor 20 shifts to the ON state. At the same time, the transistor 25 is turned on.
Therefore, the base current of the transistor 20 rapidly increases, and the transistor 20 immediately shifts to the ON state. As shown in FIGS.
The terminal voltage V2 and the delay voltage V3 of the output of the detection circuit 21 simultaneously and immediately shift to the high level.

Therefore, the transistors 11 of the respective delay voltage detecting circuits 7 of the controlled devices 5A and 5B are turned on at the same time due to the steep rising characteristic of the delay voltage V3, and thus the controlled devices 5A and 5B. The required operating voltages V4 and V5 of the respective delay voltage detecting circuits 7 become low level almost at the same time as shown in FIG. 4 (d), and the controlled devices 5A and 5B.
Are stopped at the same time. Thus, in the case of the embodiment shown in FIG. 3, the rise of the delay voltage V3 is steeper than that of the embodiment shown in FIG.
Suitable for controlling together.

[0014]

As described above, the remote control signal detection circuit of the present invention includes a capacitor for creating a delay time,
The conventional large-capacity capacitor is replaced by a small-capacity capacitor by making it function as an operation signal source of a transistor provided in series in the controlled device without being provided directly and in parallel with the delay voltage detection circuit of the controlled device. It was possible to obtain a remote control signal detection circuit capable of stably controlling the controlled device from the operating state to the non-operating state while achieving downsizing and weight reduction. .

[Brief description of drawings]

FIG. 1 is a remote control signal circuit diagram including an embodiment of a detection circuit according to the present invention.

FIG. 2 is an operation waveform diagram of a remote control signal circuit including an embodiment of the detection circuit according to the present invention.

FIG. 3 is a remote control signal circuit diagram including another embodiment of the detection circuit according to the present invention.

FIG. 4 is an operation waveform diagram of a remote control signal circuit including another embodiment of the detection circuit according to the present invention.

FIG. 5 is a remote control signal circuit diagram including an example of a conventional detection circuit.

FIG. 6 is an operation waveform diagram of a remote control signal circuit including an example of a conventional detection circuit.

[Explanation of symbols]

1,15,21 Detection circuit 2,16 Capacitor 3,4,8,9,17,18,22,23,24 Resistor 5,5A, 5B Controlled device 6 Controlled circuit 7 Delay voltage detection circuit 10,19 Zener diode 11, 20, 25 Transistor 12 Remote control device 13 Power supply 14 Switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Mamoru Sekiguchi 10-13 Minamimachi, Hanno City, Saitama Prefecture Shindengen Industrial Co., Ltd. (72) Inventor Nobuhiko Yamashita 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo No. Nippon Telegraph and Telephone Corporation (72) Inventor Toshiaki Yachi 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Inside Nippon Telegraph and Telephone (72) Inventor Naoki Murakami 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo No. within Nippon Telegraph and Telephone Corporation (72) Inventor Yasaya Murakawa 3-6-3 Kitano, Niiza City, Saitama Sanken Electric Co., Ltd. (72) Inventor Koji Arai 18-18 Takada, Toshima-ku, Tokyo Within Origin Electric Co., Ltd.

Claims (2)

[Claims] 1. When controlling a controlled device such as a power supply device or an electronic device from an operating state to a non-operating state by a control signal from a remote control device, a capacitor is used to determine whether the control signal continues for a predetermined time. Detection of a remote control signal, which is detected by a detection circuit including a resistor, and controls the controlled device to an inoperative state by a delay voltage output from the detection circuit when the control signal continues for a predetermined time. In the circuit, a series circuit of the capacitor and the resistor is provided in parallel in the remote control device, and a semiconductor element that is turned on when the terminal voltage of the capacitor according to the control signal rises to a predetermined value is connected in series to the controlled device. A circuit for detecting a remote control signal, wherein the controlled device is controlled to an inoperative state by the output of the semiconductor element. 2. When controlling a controlled device such as a power supply device or an electronic device from an operating state to a non-operating state by a control signal from a remote control device, a capacitor determines whether or not the control signal continues for a predetermined time. Detection of a remote control signal, which is detected by a detection circuit including a resistor, and controls the controlled device to an inoperative state by a delay voltage output from the detection circuit when the control signal continues for a predetermined time. In the circuit, the remote control device is provided with a series circuit of the capacitor and the resistor in parallel, and the first semiconductor element that is turned on when the terminal voltage of the capacitor according to the control signal rises to a predetermined value is the controlled device. In series with the first
A second semiconductor element that is turned on by the operation output of the second semiconductor element is provided in the operation circuit of the first semiconductor element,
Circuit for detecting a remote control signal, wherein the controlled device is controlled to an inoperative state by the output of the first semiconductor element whose on-operation has a sharp rise due to the operation of the semiconductor element .