JPH0227642Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for distributing wideband signals such as television signals, data signals from computers or analog or digitized output signals from measuring equipment.

In particular, the present invention relates to a distribution device that can output a plurality of broadband input signals to each signal source without interference, interference, etc., and with minimal insertion loss.

In particular, in accordance with the invention, a first or primary input is normally connected to an output, and energizing the relay connects the output to a selected one of the other inputs. This selection can be made by operating switches associated with each input.

A booster amplifier is inserted between the relay contact and the output, and this amplifier amplifies the broadband signal of one input and provides it to the output.

The operation panel of the dispensing device according to one embodiment of the present invention has seven pushbutton switches 10, 12, 14, 1.
6, 18, 20, 22 are shown, switches 10,
LED above 12, 14, 16, 18, 20
Lamps 11, 13, 15, 17, 19, and 20 are shown, respectively. Switch 10 is "ANT"
This switch corresponds to the SW-1 switch in Figure 2. Switches 12, 14, 16, 18, 20 are SW-2, SW-3, SW-4, respectively in FIG.
Corresponds to SW-5 and SW-6. The pushbutton switches 12, 14, 16, 18, and 20 are of the type that when any one is pressed, the previously pressed switch returns, so two of them can be pressed at the same time to turn on. There isn't. When these switches are pressed, the associated LEDs will turn on. switch 2
2 is a power on/off switch, which is turned on when pressed.

Figure 2 shows six input terminals 24, 26, 28, 3.
0, 32, 34 are shown. 24 is "AMT"
It is designated as an input and is connected to, for example, an external antenna, and a resistor 36 (1.8 MΩ) is connected in parallel. Switch buttons 12, 14 in FIG.
Input terminals 2 corresponding to 16, 18, and 20, respectively
6, 28, 30, 32, 34 are related double switches SW-2, SW-3, SW-4, SW-5 and
Each has SW-6. SW-2, SW-
Switches SW-3, SW-4, SW-5 and SW-6 are shown in the off position in the figure. However, as mentioned in connection with the pushbutton in Figure 1,
One of the switches is on. For simplicity of the drawing, the LED activation circuit is not shown in FIG.

The embodiment shown in FIG. 2 has a power supply unit 38, which includes a power transformer T-2 that receives commercial voltage and converts it to a low voltage, a double-wave rectifier circuit consisting of one diode D10, D11, a resistor R13, The filter circuit includes a capacitor C31. The pushbutton switch 22 in FIG.
This corresponds to switch SW-7 in the figure. The power supply unit 38 supplies a DC positive voltage to an amplifier 40 and a relay 42, which will be described later.

The relay 42 has a biasing winding 44 and two fixed contacts 4.
6, 48 and a movable contact 50. The movable contact 50 is connected to the fixed contact 48 when not energized, and is switched to the fixed contact 46 when energized by turning on the switch SW-1. Thus, relay 42 connects ANT input terminal 24 to the input of amplifier 40 when energized. Fixed contact 48 connects the input of amplifier 40 to input bus 52 when the relay is de-energized. Each input terminal 26, 28, 30, 32 and 34 is connected to a respective switch SW-2, SW-3, SW-4,
It is connected to the input bus 52 via SW-5 and SW-6. In the figure, each of these switches is shown as a double switch, but of course it can also be configured as a rotary switch.

For example, the amplifier 40 operates from DC to 1GHz (1000MHz).
This input includes an IC 54 having an amplification range of up to 100 Hz, and an input protection circuit consisting of anti-parallel diodes D1 and D2 is provided at its input. This amplifier is
Usually selected from commercially available ICs. The output of IC 54 of amplifier 40 is connected to coupler 56 via capacitor C9. The coupler 56 may consist of a balloon coil, the output of which is connected to two output terminals 58 and 60. Even if a load is connected to both output terminals 58 and 60, balloon coil 56 can provide the output of amplifier 40 without interfering with each other.
Functionally, coil 56 receives the output of amplifier 54 in an unbalanced manner and delivers it in a balanced manner.

As mentioned above, with the above-mentioned configuration of the present invention,
It can perform the following functions:

(1) Normally, that is, in the non-energized state of the relay 42,
Outputs 58, 60 are selectively distributed to any input other than the first input (ANT input).

(2) By turning on the first switch SW-1, the antenna input is distributed to the output.

(3) Booster amplifier 40 amplifies the already selected input.

(4) A balloon carp is effectively used as a coupler, and the unbalanced output can be distributed to two output terminals.

[Brief explanation of the drawing]

FIG. 1 is a perspective view for explaining a switch operation section of a dispensing device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of the device.

Claims (1)

[Scope of utility model registration request] a main input terminal, a plurality of sub-input terminals, and an output terminal; the main input terminal is connected to the output terminal when energized, and a selected one of the auxiliary input terminals is connected to the output when not energized; a first switch for energizing and deenergizing the relay device; and a switch device for supplying one of the sub-input terminals to the relay device;
The output terminal comprises first and second output terminals, and a broadband amplifier and a coupler are provided for connecting the relay device to the first and second output terminals, the coupler receiving an unbalanced signal from the amplifier. A broadband signal distribution device characterized in that it outputs an input in a balanced state, and provides the balanced outputs to the first and second output terminals, respectively.