JPH073434Y2 - High voltage electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a high-voltage electronic component adopted as a peripheral circuit of a CRT, and more particularly to a structure capable of miniaturizing the component.

[Conventional technology]

Conventionally, for example, in a CRT peripheral circuit for an oscilloscope, a high-voltage multiple voltage rectifier circuit, for example, an anode output circuit, a low-voltage circuit compared to the circuit, and a circuit that requires potential stability, For example, when arranging a cathode circuit or the like, it is general to dispose the both circuits so that the adverse effect due to AC induction from the anode output circuit to the cathode circuit is small to the extent that there is no practical problem.

[Problems to be solved by the invention]

By the way, recently, in response to the demand for miniaturization of electronic devices,
There is also a strong demand for miniaturization of the above high-voltage electronic components. However, in the high-voltage electronic component having the above-described conventional structure, since a certain distance is required between the both circuits, the area occupied by the both circuits on the substrate becomes large,
There is a problem that it is difficult to meet the above-mentioned demand for miniaturization. Further, even though the cathode circuit has a low voltage, this means that the voltage is lower than that of the anode output circuit. Therefore, naturally, it is necessary to consider the insulation of the cathode circuit itself. The shape of parts becomes large.

Therefore, in order to reduce the size and ensure insulation, it is conceivable to house both the anode and cathode circuits in the same exterior case. In this case, however, since both circuits are close to each other, the anode output There is a problem that AC induction is generated by the circuit and the ripple voltage of the cathode circuit increases.

Therefore, in view of the above-mentioned conventional problems, an object of the present invention is to provide an electronic component for high voltage which can achieve miniaturization while suppressing ripple voltage.

[Means for solving problems]

The present invention provides a high-voltage multiple voltage rectifier circuit, and a high-voltage electronic component including a low-voltage circuit that has a lower voltage and requires a stable potential than the high-voltage multiple voltage rectifier circuit. The rectifier circuit and the low-voltage circuit are housed and arranged in the same exterior case, and a circuit having a low impedance in terms of AC is arranged between the two circuits.

Here, as the low impedance circuit in the present invention, for example, a heater circuit can be adopted, and this can be realized by wiring a lead wire between the both circuits or by forming a wiring pattern on a substrate. .

[Action]

According to the high-voltage electronic component of the present invention, the low-impedance circuit is arranged between the high-voltage multiple-voltage rectifier circuit and the low-voltage circuit. Induction is suppressed, and even if both circuits are brought close to each other, the low voltage circuit is not adversely affected. Therefore, both circuits can be accommodated and arranged in one case, and as a result, miniaturization can be achieved while lowering the ripple voltage, and insulation of the low voltage circuit can be realized.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an electronic component for high voltage according to an embodiment of the present invention, which is an example of a power supply circuit for an oscilloscope.

In the figure, reference numeral 1 is a power supply circuit for an oscilloscope, which is a state in which an anode output circuit 3 as a high-voltage multiple-voltage rectifier circuit and a cathode circuit 4 as a low-voltage circuit are arranged close to each other in an exterior case 2. It is configured to be housed and arranged in.

The anode output circuit 3 receives an alternating high voltage,
It is for rectifying this and generating a high voltage for the anode. It has many diodes between the output and input cables 5a and 5b.
7. It is configured by connecting a capacitor 8.

The cathode circuit 4 is a circuit that requires a stable potential,
It is for generating a cathode voltage (grid voltage), and a large number of capacitors 10a, 10b on the printed circuit board 9,
A diode 11 and a resistor 12 are arranged.
Reference numeral 13 is an external connection electrode. Further, without using the printed board 9, the capacitors 10a, 10b, the diode 11
And the resistor 12 may be provided.

At the boundary between the anode output circuit 3 and the cathode circuit 4, a heater circuit 14 as an AC low impedance circuit is provided. This circuit includes a lead wire 14b between the electrodes 14a, 14a attached to the housing case 2.
Although not shown, one end of the lead wire 14b is AC-grounded outside the case 2 although not shown. Instead of wiring the lead wire 14b, a pattern may be formed on the substrate 9.

The exterior case 2 is filled with an insulating resin (not shown) after the circuits 3, 4, 14 and the like are arranged.

Next, the function and effect of this embodiment will be described.

As described above, in the conventional CRT peripheral circuit, when the anode output circuit and the cathode circuit are arranged close to each other, the potential on the cathode circuit side is not stable due to the AC induction from the anode output circuit, and the voltage of the circuit is not stabilized. There is a problem that the characteristics are adversely affected, and in order to prevent this, the two circuits have to be arranged apart from each other, so that the demand for miniaturization cannot be met. On the other hand, in the present embodiment, since the low impedance circuit 14 is arranged between the anode output circuit 3 and the cathode circuit 4, the AC induction by the anode output circuit 3 is suppressed, so that both the anode and cathode circuits 3 are provided. , 4 arranged close to each other, the voltage characteristics of the cathode circuit 4 are hardly affected. As a result, both the circuits 3 and 4 can be arranged in one small exterior case 2, and the size of the component can be reduced. Moreover, the low impedance circuit 14 of the present embodiment can be realized only by wiring the lead wire 14b in the case 2, so that the structure does not become complicated.

In the above embodiment, the power supply circuit for the oscilloscope is taken as an example, but it goes without saying that the scope of application of the present invention is not limited to such a circuit. The present invention can be applied to any electronic component that needs to be provided with a low voltage circuit that requires a stable potential.

[Effect of device]

As described above, according to the high-voltage electronic component of the present invention, the low-impedance circuit is provided between the high-voltage multiple voltage rectifier circuit and the low-voltage circuit requiring a stable potential. It is possible to suppress adverse effects due to AC induction from the voltage circuit, to arrange both circuits in one small case, and to achieve miniaturization of parts.

[Brief description of drawings]

FIG. 1 is a plan view of an oscilloscope power supply circuit according to an embodiment of the present invention, and FIG. 2 is a sectional front view thereof. In the figure, 1 is a power supply circuit for an oscilloscope (high-voltage electronic component), 2 is an outer case, 3 is an anode output circuit (high-voltage multiple voltage rectifier circuit), 4 is a cathode circuit (low-voltage circuit), 14 Is a heater circuit (low impedance circuit).

Claims (1)

[Scope of utility model registration request] 1. A high voltage electronic component comprising a high voltage multiple voltage rectifier circuit and a low voltage circuit which requires a stable potential as compared with the circuit, and a multiple voltage of the high voltage. A high-voltage electronic component, characterized in that a voltage rectifier circuit and a low-voltage circuit are housed and arranged in the same outer case, and an AC low-impedance circuit is arranged between the two circuits.