JPH0634657A - Electricity supply device - Google Patents

Abstract

PURPOSE:To prevent oscillation and noise which are generated at a terminal of an electronic component to be measured, when a voltage or a current is supplied to the electronic component. CONSTITUTION:In an electricity supply device 10, a ferrite member 20 having an opening is passed through the main body 14 of the electricity supply device and fitted in the vicinity of a contact terminal 12. As for the fitting of this ferrite member 20, it may be fixed also by covering it with an elastic member 22. According to this constitution, the impedance at the time when the contact terminal 12 of the electricity supply device 10 comes into contact with a terminal of an electronic component changes, and therefore oscillation and noise can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric power supply device capable of preventing oscillation and noise of an electronic part caused by supplying a current or a voltage to an electronic part to be measured when measuring electric characteristics of the electronic part.

[0002]

2. Description of the Related Art Measuring instruments such as a curve tracer and a parameter analyzer are used to measure the electrical characteristics of electronic components. These measuring devices can supply voltage or current to some desired terminals of the measured electronic component to be measured, and can display the voltage value and current value at that time as the electrical characteristics of the measured electronic component. As shown in FIG. 2, an electric power supply device 1 electrically connected to a measuring device 30 in order to supply a voltage or a current to an electronic device under test.
0 is sometimes used, and in this case, the contact terminal (clip) 12 is brought into contact with a desired terminal of the measured electronic component. This is the method used when the terminal spacing of the measured electronic component is narrow. The electricity supply device 10 shown in FIGS. 1 and 2 is also called a grabber tip and is usually used as an electric test probe. When the pressing portion 18 is pushed into the electricity supply device body 14, the clip 12 is pressed.
Comes out from the tip of the main body 14 and opens left and right, and when the pushing of the pressing portion 18 is stopped, the clip 12 is closed. If this is utilized, the terminal of the measured electronic component can be sandwiched, and thus the terminal of the measured electronic component and the measuring device 30 are electrically connected. For example, in the case of a transistor, if the three terminals of the base, the emitter and the collector are sandwiched by the clips 12 of the electric power supply device 10 and brought into contact with each other, and a voltage or a current is supplied to each of them, the voltage value and the current value between the three terminals, etc. You can look up relationships.

In a characteristic test of an electronic component or the like, a voltage is applied to a measured electronic component to measure a current value, or conversely, a current is supplied to measure a voltage value. At this time, if voltage or current is supplied to the terminals of the measured electronic component, oscillation and noise may occur in the measured electronic component. This phenomenon occurs even when the supplied voltage or current changes slowly and is almost direct current, that is, not at high frequency.
One of the causes for this is that there is a capacitance or the like between the adjacent terminals of the measured electronic component. Further, one cause is that the measuring device 30 that supplies voltage or current to the component under measurement is separated, and the conductor wire that electrically connects the two has stray capacitance, inductance, etc. due to its length. This is because.
Therefore, when a current is supplied to the electronic component, oscillation and noise occur, and accurate electrical characteristics cannot be measured as they are.

Conventionally, as one countermeasure against such a case, a ferrite member having openings formed in ferrite, which is amorphous iron oxide, has been used as follows. That is, oscillation and noise have been stopped by passing a ferrite member through the terminal of the electronic component to be measured or by contacting a lead wire passing through the ferrite member with the terminal. Alternatively, oscillation is stopped by making a plurality of holes in a plate-shaped ferrite and inserting terminals of electronic parts into these holes. Since these ferrites have the same inductance as a coil, they utilize the fact that the impedance of the measured electronic components, including the terminals, measuring equipment, and conductors, changes. In this way, the electrical characteristics were measured after preventing the oscillation and noise.

[0005]

When a voltage or current is supplied to the electronic device under test, oscillation and noise may occur between the terminals of the electronic device under test. In order to prevent this, it is very complicated to insert a ferrite member into the terminal of the electronic component to be measured or to bring a conductor passing through the ferrite member into contact with the terminal of the electronic component to be measured. Further, the ferrite member is slightly conductive. Therefore, if the ferrite member is inserted into the terminal when the terminal interval is short, the terminals may short-circuit with each other via the ferrite member.

Therefore, an object of the present invention is to generate a voltage or current at a terminal of a measured electronic component when supplying a voltage or a current to the measured electronic component, without requiring complicated procedures, fear of short-circuiting the terminals. An object of the present invention is to provide an electricity supply device that can effectively prevent oscillation and noise and can be used for measuring electrical characteristics. Another object of the present invention is an inexpensive and simple configuration, which effectively prevents oscillation and noise generated at the terminals of the measured electronic component when a voltage or current is supplied to the measured electronic component, An object of the present invention is to provide an electricity supply device that can be used for measuring electrical characteristics.

[0007]

SUMMARY OF THE INVENTION The electricity supply device of the present invention is a measuring device 30 for measuring the electrical characteristics of an electronic component to be measured.
Is supplied to the terminal of the electronic device under test, and has a contact terminal 12 for contacting this terminal. At this time, the ferrite member 20 having an opening is passed through the main body 14 of the electricity supply device and mounted near the contact terminal 12. Ferrite member 20 in which ferrite is cylindrical
Has an inductance, it is possible to prevent oscillation and noise generated at the terminals of the measured electronic component when a voltage or current is supplied to the measured electronic component.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an embodiment of an electric power supply device 10 of the present invention. As in the conventional case, the terminals of the electronic component to be measured are sandwiched by the contact terminals (clips) 12, thereby supplying a voltage or current to a desired terminal of the electronic component to be measured. The ferrite member 20 is the main body 1 of the electricity supply device 10.
4 is attached near the clip 12. The ferrite member 20 used in FIG. 1 has a tubular shape so that the electricity supply device body 14 can be inserted therein. It is preferable to use a ferrite member 20 having a short length and use a plurality of ferrite members 20 in order to obtain a required inductance. This way
The obtained inductance can be changed depending on the number of the ferrite members 20 used. In order to mount the ferrite member 20 on the electricity supply device body 14, the ferrite member 20 is covered with the elastic member 22. Further, the ferrite member 20 may be attached by simply adhering it with an adhesive. Although there is no problem in normal use, the elastic member 22 is preferably an insulating member in order to prevent a short circuit due to the ferrite member 20. In order to obtain the effect of the present invention, it is sufficient that it can be easily attached to the electricity supply device 10 and the impedance can be changed, and therefore, it is not limited to the ferrite member. For example, a coil may be wound around the probe body 14.

[0009]

EFFECT OF THE INVENTION By simply and simply improving the conventional electric power supply device, it is possible to prevent oscillation and noise generated at the terminals of the electronic device under test when a voltage or current is supplied to the electronic device under test. be able to. Further, it can be easily applied to any electricity supply device. Furthermore, in order to prevent oscillation and noise, complicated procedures such as passing a ferrite member through the terminal of the electronic device under test or contacting the lead wire through the ferrite member with the terminal are not required, and the measurement of a normal electric power supply device is eliminated. It is possible to measure the electrical characteristics of the electronic component under test while preventing oscillation and noise without changing the operation. Further, since the ferrite member is attached to the main body of the electricity supply device, there is no fear of a short circuit which occurs when the ferrite member is passed through the terminals of the electronic components adjacent to each other and having a narrow terminal gap.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an electricity supply device of the present invention.

FIG. 2 is a diagram showing an example of a conventional electricity supply device.

[Explanation of symbols]

 10 Electric Supply Device 12 Contact Terminal 14 Electric Supply Device Main Body 20 Ferrite Member

Claims (1)

[Claims] 1. An electric power supply device having a contact terminal for contacting a terminal of the electronic device under test, in order to supply a voltage or current supplied by a measuring device for measuring the electrical characteristics of the electronic device under test to the terminal of the electronic device under test. A ferrite member having an opening is passed through the main body of the electricity supply device through the opening, and the ferrite member is mounted in the vicinity of the contact terminal of the main body to supply a voltage or a current to the electronic device under test. An electric supply device which prevents oscillation and noise that sometimes occur at the terminals of the measured electronic component.