JPS636464A - Wireless probe - Google Patents

Abstract

PURPOSE:To eliminate a cable and to prevent ringing, and to take measurement even when an IC to be observed and a measuring instrument are at distance by transmitting an electric signal detected by a stylus in the form of a radio wave. CONSTITUTION:A stylus 1 and an antenna 11 are fixed to a head 14, which incorporates a transmitter 10. Further, an antenna 12 is fixed to a box 15, which incorporates a receiver 13. The electric signal detected by the stylus 1 is converted by the transmitter 10 in the box 15 into the radio wave, which is transmitted from the antenna 11. This radio wave is received by the antenna 12 and demodulated by the receiver 13 in the box 15 into the electric signal, which is supplied to a synchroscope.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wireless probe used in various measuring instruments for developing, maintaining, debugging, etc. electronic circuits.

[Prior Art] FIG. 4 shows a conventional probe. In this figure, 1 is a needle, which is fixed to the head 2. In addition, 3 is GND
It is a terminal.

The head 2 is connected by a cable 4 to a box 5, which in turn is connected to a synchronoscope (not shown).

In such a configuration, the needle 1 is brought into contact with a pin of an IC or the like. As a result, an electrical signal is detected by the needle 1,
The detected electrical signal is supplied to the synchroscope via the head 2, cable 4 and hook 5.

That is, in the conventional probe, the box 5 and the head 2 are electrically connected by the cable 4.

[Problems to be Solved] However, conventional probes have the following drawbacks. That is, first, inductance is generated due to the electrical characteristics of the cable 4, a resonant circuit is formed, and ringing occurs in frequency components near the co-mining frequency.

Second, if there is no space for the cable to pass through, physical connection with the pins of the IC cannot be made.

Thirdly, there is a drawback that the measuring device cannot be placed at a position longer than the length of the cable.

Solution to Problem] This invention was made in view of the above circumstances, and includes a needle that detects an electrical signal, a head that fixes the needle, and supplies the electrical signal detected by the needle to a synchroscope. In the wireless probe, the head includes a transmitter that converts the electrical signal detected by the needle into radio waves and transmits the radio waves, and the box transmits the radio waves transmitted from the transmitter. The device is characterized by having a receiver for receiving.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the electrical configuration of a wireless probe according to an embodiment of the present invention. In this figure, the needle 1 detects an electrical signal and supplies it to a transmitter 10.

The transmitter 10 converts the electric signal supplied from the needle 1 into radio waves and transmits them from the antenna 11.

- On the other hand, this radio wave is detected by the antenna 12 and supplied to the receiver 13. The receiver 13 demodulates the electrical signal from the radio waves.

Next, FIG. 2 shows the head 14 of the wireless probe.
FIG. The needle 1 and the antenna 11 are fixed to the head 14, and the transmitter 10 is built into the head 14. Note that 3 is the G
This is an ND terminal.

Next, Figure 3 shows the box 15 of the wireless probe mentioned above.
FIG. An antenna 12 is fixed to this box 15, and the receiver 13 is built into this box 15.

In the above configuration, an electrical signal detected by the needle 1 is converted into a radio wave by the transmitter 10 in the head 14 and transmitted from the antenna 11.

This radio wave is received by antenna 12 and box 1
The signal is demodulated into an electrical signal by a receiver 13 in the receiver 5 and supplied to a synchroscope.

[Effects of the Invention] As explained above, according to the present invention, the present invention includes a needle that detects an electrical signal, a head that fixes the needle, and a box that supplies the electrical signal detected by the needle to a synchroscope. In the wireless probe made by
The head has a transmitter that converts the electrical signal detected by the needle into radio waves and transmits them, and the box includes:
Since it has a receiver that receives the radio waves transmitted from the transmitter, there is no need for cables, so ringing does not occur.

Moreover, even if there is no space for a cable to pass through, the electric signal of the IC can be measured.

Furthermore, there is an effect that measurement can be performed even if the IC to be observed and the measuring instrument are far apart.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a side view showing the transmitting side head section of the embodiment, FIG. 3 is a side view showing the receiving side box section of the embodiment, and FIG. 4 is a side view showing the receiving side box section of the embodiment. FIG. 2 is a side view showing a conventional probe. Needle 2: Head 3: GND terminal 4: Cable 5: Box
10: Transmitter 11: Antenna 12 Antenna 13: Receiver 14: Head 15: Box

Claims (1)

[Claims] A needle that detects electrical signals, a head that fixes this needle,
A wireless probe comprising a box for supplying an electrical signal detected by the needle to a synchroscope, wherein the head has a transmitter that converts the electrical signal detected by the needle into radio waves and transmits the radio waves, The wireless probe is characterized in that the box includes a receiver that receives radio waves transmitted from the transmitter.