JP3386916B2 - Split unit type electric equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split unit type electric device which is divided into a unit having a power source and a unit having no power source.

[0002]

2. Description of the Related Art For example, a satellite communication device is constructed by dividing it into an indoor unit and an outdoor unit, and uses a control line dedicated to the indoor unit to switch the reception bandwidth or the transmission level of the outdoor unit. Alternatively, a multi-core wire is used to send a control signal.

However, in such a conventional split unit type electric equipment, a dedicated control line or multi-core wire is required to send a control signal, a connector for connecting the control wire is required, and a construction cost is required. However, when the simple control is required, there is a problem that the cost-effectiveness ratio is poor.

Therefore, as shown in FIG. 4, the unit 1 is divided into a unit 1 having a power source and a unit 2 having no power source, and the unit 2 having no power source is supplied with power from the unit 1 having a power source through a power line 3. In a split unit type electric device having such a configuration, a control method has been proposed in which a unit 1 having a power source sends a control signal via a power line 3 to control a unit 2 having no power source.

In this case, the unit 1 having a power supply includes a main circuit 4 for processing a transmission / reception signal, a power supply circuit 5, and a control signal forming circuit 6 for forming a control signal.
Supplies power to the main circuit 4 and also supplies power to the unit 2 having no power supply through the control signal forming circuit 6 and the power supply line 3.
The control signal forming circuit 6 forms a control signal composed of a pulse signal and sends the control signal to the unit 2 having no power supply through the power supply line 3.

The unit 2 having no power supply has a main circuit 7 having a control target section for switching transmission / reception modes such as band and transmission / reception level, an amplification section for amplification, etc., in addition to a signal processing section for processing signals. The control circuit 8 receives a control signal sent via the power supply line 3 and controls the control target part of the main circuit 7.

In this case, the control circuit 8 has a differentiating circuit 9 for differentiating a control signal consisting of a pulse signal, a diode 10 for rectifying the differential output to remove the negative component, and an integrating circuit for integrating the positive differential output. Circuit 11 and reference voltage forming circuit 12
And the integrated voltage from the integrating circuit 11 is used as the reference voltage forming circuit 1
It is composed of a comparison circuit 13 that outputs a control signal when the integrated voltage is larger than the reference voltage from 2 and a relay 14 that is driven by this control signal to control the main circuit 7.

The main circuit 4 in the unit 1 having a power source and the main circuit 7 of the unit 2 having no power source are directly connected to each other by a power source line 3 for transmitting and receiving a signal.

In such a split unit type electric device,
A control signal composed of a pulse signal is sent from a unit 1 having a power source to a unit 2 having no power source through a power line 3. In the unit 2 that does not have the power source, the control signal composed of this pulse signal is received by the control circuit 8, differentiated by the differentiating circuit 9, and the differential output of this differentiating circuit 9 is rectified by the diode 10 to remove the negative side component. And the positive differential output is integrated circuit 1
1, the integrated voltage from the integrating circuit 11 is compared with the reference voltage from the reference voltage forming circuit 12 in the comparator circuit 13, and when the integrated voltage is larger than the reference voltage, a control signal is output to relay the signal. 14 is operated to control the main circuit 7.

In such a control method, a dedicated control line or a multi-core wire for sending a control signal is not required, and a connector therefor is also unnecessary, which requires no construction cost and has a good cost-effective ratio. There is.

[0011]

However, the unit 1 having no such power supply receives the control signal composed of the pulse signal from the unit 1 having such a power supply through the power supply line 3.
However, in the control method in which the control signal is sent to the control circuit, the stability of the control is lost due to noise such as chattering at the rising and falling edges of the pulse signal.

An object of the present invention is to send a control signal from a unit having a power source to a unit not having a power source through a power line. However, a split unit type electric device capable of avoiding a bad influence of control due to noise such as chattering is provided. To provide.

[0013]

The present invention is divided into a unit having a power source and a unit having no power source,
A unit having no power source is configured to be supplied with power from a unit having a power source, and a unit having no power source is controlled by a control signal sent from a unit having a power source via a power line. The target of the improvement is the split unit type electrical equipment .

In the split unit type electric equipment according to the present invention, the unit having a power supply is provided with a power supply voltage rising slope signal forming circuit for forming a power supply voltage rising slope signal having a slope when the power supply voltage rises, and has a power supply. The unit that does not include a control circuit that receives a power supply voltage rising slope signal sent through a power supply line as an input, discriminates the signal by utilizing the difference in the slope angle, and controls the control target unit.

Further, the control circuit of the unit having no power supply is, specifically, a differentiation circuit for differentiating the power supply voltage rising slope signal sent through the power supply line, and the differentiation output of the differentiation circuit exceeds a predetermined level. And a latch circuit that outputs a latch signal to control the control target portion.

[0016]

As in the split unit type electric equipment according to the present invention, a unit having a power supply is provided with a power supply voltage rising slope signal forming circuit for forming a power supply voltage rising slope signal having a slope when the power supply voltage rises, and a power supply is provided. The unit that does not have a structure is provided with a control circuit that receives a power supply voltage rising slope signal sent via a power supply line as an input and discriminates the signal by utilizing the difference in the slope angle to control the control target portion. Unlike the pulse signal, the power supply voltage rising slope signal is not bothered by noise such as chattering of rising and falling, so that it is possible to stably control the unit without a power supply.

In this case, the control circuit of the unit having no power supply is provided with a differentiation circuit for differentiating the power supply voltage rising slope signal sent through the power supply line, and when the differentiation output of the differentiation circuit exceeds a predetermined level. With a structure having a latch circuit that outputs a latch signal to control the control target portion, a stable control operation can be performed with a simple circuit.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. The parts corresponding to those in FIG. 4 described above are designated by the same reference numerals.

The split unit type electric device of this embodiment is also divided into a unit 1 having a power source and a unit 2 having no power source, and the unit 2 having no power source passes from the unit 1 having a power source through the power source line 3. It is configured to be powered.

Also in this case, an example applied to a satellite communication device will be described. The unit 1 having a power supply includes a main circuit 4 for processing a transmission / reception signal, a power supply circuit 5, and a power supply voltage rising slope signal forming circuit 16. Provided, the power circuit 5 is the main circuit 4
To the unit 2 having no power supply through the control signal forming circuit 6 and the power supply line 3, and the power supply voltage rising slope signal forming circuit 16 outputs the power supply voltage rising slope signal having a slope at the rising of the power supply voltage. It is designed to be formed as a control signal. In this case, the power supply voltage rising slope signal forming circuit 16 is configured to include a time constant circuit to form the power supply voltage rising slope signal.

The unit 2 which does not have a power source has a main circuit 7 which has, in addition to a signal processing unit for processing a signal, a control target unit for switching transmission / reception modes such as band and transmission / reception level and an amplification unit for amplification. The control circuit 8 receives a power supply voltage rising slope signal as a control signal sent via the power supply line 3 and controls the control target part of the main circuit 7.

In this case, the control circuit 8 outputs a latch signal when the differentiated circuit 9 that differentiates the power supply voltage rising slope signal and the differentiated output of the differentiated circuit 9 exceeds a predetermined level. Latch circuit 1 for controlling the controlled part
7 and 7.

The main circuit 4 in the unit 1 having a power source and the main circuit 7 of the unit 2 having no power source are directly connected to each other by a power source line 3 for transmitting and receiving a signal. As such a power supply line 3, a coaxial cable is used in this embodiment.

In such a split unit type electric device,
The power supply voltage rising slope signal forming circuit 16 of the unit 1 having a power supply sends a power supply voltage rising slope signal as a control signal to the unit 2 having no power supply when the power supply voltage rises. In the unit 2 that does not have the power source, the control signal is received by the control circuit 8 when the power source voltage rises, differentiated by the differentiating circuit 9, and the differential output of this differentiating circuit 9 is input to the latch circuit 17. Latch circuit 17
Then, the differential output of the differentiating circuit 9 is compared with the threshold level, and when the differential output exceeds the threshold level, a latch signal is output to control the controlled portion of the main circuit 7. For example, in the satellite communication device, when the unit 1 having a power source is an indoor unit and the unit 2 having no power source is an outdoor unit, bandwidth switching or transmission level switching can be performed by such control.

3 (A) to 3 (F) are time charts showing the operation of the split unit type electric equipment of this embodiment.

When the power is turned on, the power supply voltage rising slope signal forming circuit 16 of the unit 1 having a power supply shows the power supply voltage rising slope signal A as shown in FIG. 3A or the power supply voltage rising slope signal A having a steep rising angle. The power supply voltage rising slope signal B having such a gentle rising angle is sent to the unit 2 having no power supply through the power supply line 3. In the case of this embodiment, the power supply voltage rising slope signal A having a steep rising angle is used as a signal for switching the transmission / reception mode. The power supply voltage rising slope signal B having a gentle rising angle is used as a signal that does not switch the transmission / reception mode.

In the unit 2 which does not have the power source, the control signal A or B is received by the control circuit 8 and differentiated by the differentiating circuit 9 when the power source voltage rises. When the differentiating circuit 9 differentiates the power supply voltage rising slope signal A as shown in FIG. 3 (A) having a steep rising angle, a steeply rising output having a rising angle as shown in FIG. 3 (C) is obtained. Also, FIG. 3 (B)
Differentiating the power-supply voltage rising slope signal B having a gentle rising angle as shown in FIG. 3A gives a differential output having a gentle rising angle as shown in FIG. Note that FIG.
In (C) and (D), S is the threshold level.

The power supply voltage rising slope signal A or B which is a differential output from the differentiating circuit 9 is supplied to the latch circuit 17
To enter. The latch circuit 17 compares the power supply voltage rising slope signal A or B with the threshold level.
When the threshold level is exceeded like the power supply voltage rising slope signal A, the latch circuit 17 operates as shown in FIG.
A latch signal as shown in (E) is output to control the controlled portion of the main circuit 7 to switch the transmission / reception mode. When the threshold level is not exceeded like the power supply voltage rising slope signal B, the latch circuit 17 does not output the latch signal as shown in FIG. Do not switch modes.

When the transmission / reception mode is switched again, the power supply voltage rising slope signal when the power is turned off and then turned on again is used.

[0030]

According to the split unit type electric equipment of the present invention, the unit having the power supply forms the power supply voltage rising slope signal forming circuit for forming the power supply voltage rising slope signal having the slope at the rising of the power supply voltage. A unit having no power supply is provided with a control circuit for controlling a control target unit by inputting a power supply voltage rising slope signal sent through a power supply line and utilizing the difference in the slope angle to determine the signal. Therefore, unlike the pulse signal, the power supply voltage rising slope signal is not bothered by noise such as chattering of rising and falling, so that the unit without a power supply can be stably controlled. it can.

In this case, the control circuit of the unit having no power supply is provided with a differentiating circuit for differentiating the power supply voltage rising slope signal sent via the power supply line, and when the differential output of the differentiating circuit exceeds a predetermined level. By having a structure including a latch circuit that outputs a latch signal and controls the control target portion, stable control operation can be performed with a simple circuit.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a split unit type electric device according to the present invention.

FIG. 2 is a block diagram showing an internal configuration of a unit having no power source of the split unit type electric device shown in FIG.

FIG. 3 is a time chart showing the operation of the split unit type electric device of the present embodiment.

FIG. 4 is a block diagram showing a configuration of a conventional split unit type electric device.

[Explanation of symbols]

Unit with one power supply 2 Unit without power supply 3 power lines 4 main circuit 5 power supply circuit 6 Control signal forming circuit 7 Main circuit 8 control circuit 9 Differentiating circuit 10 diode 11 Integrator circuit 12 Reference voltage forming circuit 13 Comparison circuit 14 relays 16 Power supply voltage rising slope signal forming circuit 17 Latch circuit

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-6-147617 (JP, A) JP-A-7-15477 (JP, A) JP-A-63-232517 (JP, A) JP-A-59- 66235 (JP, A) Actual development 2-86227 (JP, U) Actual development 1-96795 (JP, U) Actual development 3-39994 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04Q 9/00-9/16

Claims (2)

(57) [Claims] 1. A unit having a power source and a unit having no power source
The unit is divided into units and does not have the power source.
Power is supplied from the unit with the above power source through the power line.
Unit configured to be powered and not having the power source
Sent from the unit with the power supply via the power line
A division adapted to be controlled by a control signal
In the unit type electric equipment, the unit having the power source is
Forming a ramped power supply voltage ramp signal
A power supply voltage rising slope signal forming circuit;
Units that do not have before sent through the power line
Input power supply voltage rising slope signal as input
Controls the controlled part by distinguishing the signal using the difference in degree
Is provided with a control circuit for
Electric appliances . 2. A unit having a power source and a unit having no power source, wherein the unit having no power source is configured to be fed from the unit having the power source through a power line, and the unit having the power source is provided. In the divided unit type electric device, the unit not having the power source is controlled by a control signal sent from the unit having the power source through a power line, wherein the unit having the power source has a power supply voltage having a slope at the rising of the power supply voltage. A power supply voltage rising slope signal forming circuit for forming a rising slope signal, wherein the unit having no power supply differentiates the power supply voltage rising slope signal sent through the power supply line ;
When the differential output of the differentiating circuit exceeds a predetermined level
Circuit that outputs a latch signal to control the controlled part
A divided unit type electric device comprising a control circuit having: