JPS5828360Y2 - IC clip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an IC clip used for measuring voltage of an IC (integrated circuit) mounted on a printed circuit board, mainly for measuring high frequency signals.

Conventionally, when measuring the signal voltage generated by pressing the tip of a measuring instrument, especially a probe such as an oscilloscope, onto the pins of an IC mounted on a printed circuit board, the pitch between the IC pins is generally 2.54 mm. It is very narrow and it is extremely difficult to bring the tip of the probe into contact with the pins of the target IC, so measurements are taken using an IC clip.

FIG. 1 is a sectional view of a conventional IC clip,
1 is IC12 is the IC pin, 3 is the probe of the IC clip,
4 is an insulator, and 5 is a lead wire.

In use, as shown in the figure, the pin 2 of the IC is held between the probe 3 of the IC clip, and the probe is connected to the tip of the lead wire 5 to measure voltage.

However, the structure □ above has relatively long lead wires, so
The inductance of this lead length, the probe's earth lead length, and the resonance of the input capacitance of the probe cause waveform distortion of the high-frequency voltage, which has the disadvantage that accurate measurements cannot be made.

SUMMARY OF THE INVENTION In order to eliminate these drawbacks, it is an object of the present invention to provide an IC clip that allows a probe to be connected as close to an IC pin as possible and reduces the effects of inductance due to lead length and ground lead length.

FIG. 2 shows an IC clip according to an embodiment of the present invention, in which A is a plan view, the opening is a front view, and C is a side view.

FIG. 3 is a cross-sectional view taken along line AA, showing a state in which an IC is held by the IC clip according to the present invention and a probe is inserted.

1 is the pin of the IC 12, 6 is the tip of the probe, 7 is the contact of the IC clip, 8 is the grounding part of the probe, 9 is the spring for grounding, 10 is the clamp that fixes the contact 7 and the spring 9 for grounding. 11 is a contact end, 12 is a capacitor, 13 is a probe insertion hole, and 14 is a ground contact.

As shown in the figure, this function is achieved by attaching an I
The IC is connected by the force of the spring at intervals corresponding to the pin arrangement of C.
A plurality of contacts 7 are provided with a structure to clamp the pins 2, and a plurality of grounding springs 9 and a probe insertion hole 13 are provided on the rear end side of the holding body 10 in the same arrangement as the contacts 7. , the insertion hole 13 is used to insert a probe having an insulated ground portion 8 on the outer periphery of the probe 6, and is provided with a signal connection end 11 in contact with the probe 6, and the spring force of the ground spring 9 is The ground portion 8 is pressed down by the ground portion 8.

Further, all of the grounding springs 9 are electrically connected to contacts 14 (assumed) corresponding to the ground pins of the IC, and the output ends 11 are electrically connected to contacts corresponding to the signal pins of the IC. There is.

Note that even if these electrical connection methods are made using conductor wires,
Alternatively, in order to reduce waveform distortion due to resonance of the input capacitance of the probe, a capacitor 12 may be used to connect either or both of the ground circuit and the signal circuit.

As explained above, the IC clip of the present invention can securely hold an IC, and the probe can be connected and held simultaneously to the target signal pin and ground pin at the shortest distance without contacting adjacent IC pins due to the insertion hole. .

Therefore, waveform distortion due to the influence of inductance due to lead length can be reduced, and high frequency signals can also be accurately measured.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an IC clip according to a conventional example, Fig. 2 is an IC clip according to an embodiment of the present invention, where A is a plan view, the opening is a front view, C is a side view, and Fig. 3 is according to the present invention. IC
FIG. 3 is a cross-sectional view taken along line A-A showing a state in which the probe is inserted between the two. 1: IC12: IC pin, 3: IC clip probe, 6: Probe probe, 7: IC clip contact, 8 Niprobe grounding part, 9: Grounding spring, 1
0: Clamping body, 12: Capacitor, 13: Insertion hole.

Claims (3)

[Scope of utility model registration request] (1) In an IC clip that fits the IC (integrated circuit) under test and the probe of a measuring instrument such as an oscilloscope, the I
The C-clip is made of an H-shaped holding body made of insulating material.
A plurality of contacts are provided at the tip of the clamping body at intervals corresponding to the pin arrangement of the IC and have a structure that clamps the pins of the IC using spring properties, and the contactors are provided at the rear end of the clamping body. a plurality of grounding springs configured to press down the grounding portion of the probe by spring force in an arrangement equal to the above;
A plurality of insertion holes are provided into which the probes are inserted, and the insertion holes are provided with a contact end that contacts the probe of the probe and a holding portion for the grounding spring, and the grounding spring is connected to the grounding pin of the IC. An IC clip characterized in that the contact end is electrically connected to a corresponding contactor, and the contact end is electrically connected to a contactor corresponding to a signal pin of an IC. (2) Registration of a utility model characterized in that the grounding spring is connected to a contact corresponding to a ground pin of an IC, and the contact end is connected to a contact corresponding to a signal pin of an IC using conductive wires. The IC clip according to claim 1. (3) The grounding spring is connected to a contact corresponding to an IC ground pin, and the contact end is connected to a contact corresponding to an IC signal pin, either or both of them using a capacitor. An IC clip according to claim 1 of the utility model registration claim.