JPH05121136A - Ic socket - Google Patents

Abstract

PURPOSE:To reduce signal noises and reduce the number of parts by providing third layer incorporating resistors between specific two layers, and connecting IC terminal pin holes and input/output terminal pins with the resistors. CONSTITUTION:An IC socket 1 has the first layer 11 incorporating conducting IC terminal pin holes 4a-4n inserted with dual in-line type IC terminals and the second layer 12 incorporating input/output terminal pins 2a-2c inserted into a printed board. The third layer 13 incorporating resistors 3a-3c connected between the pin holes 4a-4n and the pins 2a-2c is provided. Input signals are fed to the pins 2a-2n, signal noise components are reduced by the resistors 3a-3n, and the signals are outputted to the holes 4a-4n. Signals outputted from an IC are inputted to the pin holes 4a-4n, noises are reduced by the resistors 3a, 3n, and the signals are outputted to the pins 2a-2n. The resistors 3a-3n have no relation with the printed board, they are not required to be fitted to the printed board, the number of fitted parts is reduced, and the fitting efficiency can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC socket, and more particularly to an IC socket for a dual in-line type IC.

[0002]

2. Description of the Related Art Conventionally, an IC socket of this type is mounted on a printed circuit board, and an input / output signal of a dual in-line type IC and a signal to and from the printed circuit board are simply exchanged to allow an IC to be inserted into the IC socket. The signal noise components such as overshoot and undershoot in the input and output signals were passed through as they were.

[0003]

The above-mentioned conventional IC socket is mounted on a printed circuit board to exchange input / output signals of a dual line type IC and signals with the printed circuit board. Since the signal noise components such as overshoot and undershoot in the signal input / output to / from the IC inserted in the IC are passed through as they are, in order to remove these signal noise components, it is necessary to place them close to the input / output terminals of the IC socket. Then, a resistor is inserted to deal with it. However, in addition to the increase in the number of parts, due to the pattern wiring on the printed circuit board, it may not be mounted close to the IC socket, and the effect may not be improved. There is.

The object of the present invention is to reduce the signal noise component contained in the input / output signal of the IC inserted in the IC socket without being related to the pattern of the printed circuit board, and the resistor on the printed circuit board. Is to reduce parts inspection.

[0005]

SUMMARY OF THE INVENTION An IC socket of the present invention comprises a first layer having a plurality of conductive IC terminal pin holes for inserting terminals of a dual in-line type IC and a plurality of sockets for inserting into a printed circuit board. A third layer including a resistor that connects between the IC terminal pin hole and the input / output terminal pin is provided between the third layer and the second layer including the output terminal pin.

[0006]

The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention.

In FIG. 1, the IC socket 1 of this embodiment is a conductive IC terminal pin hole 4a, 4b ... 4 (n-) into which terminals of a dual in-line type IC (not shown) are inserted.
2), 4 (n-1), and 1n including the first layer 11 and input / output terminal pins 2a, 2 to be inserted into a printed circuit board (not shown)
4 (n-1), 4n and IC terminal pin holes 4a, 4b ... 4 (n-1) and 4n between the second layer 12 including b, 2c.
a, 2b, 2c ... and a resistor 3 connected between
It has the 3rd layer 13 containing a, 3b, 3c ..., and is comprised.

Next, an application example of this embodiment will be described.

A signal input to an IC (not shown) inserted in the IC socket 1 is input to input / output terminal pins 2a, 2b, ..., 2n from a printed board (not shown), and then resistors 3a, 3b. , 3n reduce the signal noise component contained in the signal, and IC terminal pin holes 4a, 4
Output signals to b, ..., 4n.

Signals output from the IC inserted in the IC socket 1 are IC terminal pin holes 4a, 4b, ...
4n, and then the resistors 3a, 3b, ..., 3n reduce signal noise contained in the signal, and output the signal to the input / output terminal pins 2a, 2b ,.

As described above, by providing the resistors 3a, 3b, ..., 3n on the third layer 13 in the package of the IC socket 1, signals input to the input / output terminal pins 2a, 2b ,. And IC terminal pin holes 4a, 4b, ..., 4n
The signal noise included in the signal input to the resistor is reduced, and since the resistor is formed in the IC socket 1, the resistor 3a, 3b, ..., 3n is not related to the pattern of the printed board. Since it is not necessary to mount a resistor for noise reduction on the printed circuit board, the number of mounted parts is reduced and the mounting efficiency is improved.

[0013]

As described above, according to the present invention, the first layer including a plurality of conductive IC terminal pin holes into which each terminal of the dual in-line type IC is inserted and the plurality of input / outputs to be inserted into the printed circuit board are provided. By including a third layer including a resistor for connecting between the IC terminal pin hole and each of the input / output terminal pin with the second layer including the terminal pin, the insertion of the IC to be inserted is achieved. By reducing the noise component contained in the output signal, a proper output signal can be obtained, and at the same time, the noise reduction effect can be obtained without being related to the pattern of the printed circuit board. The number of resistor parts can be reduced, and the mounting efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Socket 2a, 2b, ..., 2n Input / output terminal pin 3a, 3b, ..., 3n Resistor 4a, 4b, ..., 4n IC terminal pin hole 11 First layer 12 Second layer 13 Third layer

Claims (1)

[Claims] 1. A first layer including a plurality of conductive IC terminal pin holes into which each terminal of a dual in-line type IC is inserted, and a second layer including a plurality of input / output terminal pins to be inserted into a printed circuit board. An IC socket comprising a third layer including a resistor for connecting between the IC terminal pin hole and the input / output terminal pin, respectively.