JPH05190761A - Delay-element package - Google Patents

Abstract

PURPOSE:To make the mounting space of the title package small and to prevent the performance of the title package from being deteriorated. CONSTITUTION:Delay elements 7, 8, 9 in which a GND terminal 71, an output terminal 72, an input terminal 73,... have been brought into contact with spring contacts 101,... for mounting parts 10, 11, 12 on a base body 6 are held in the base body 6 so as to be detachable. GND pins 1,..., 5,..., input pins 2, 3, 4 and output pins are brought into contact with and connected to the GND terminals, the input terminals and the output terminals corresponding to the delay elements 7, 8, 9 via respective wiring (not indicated in the figure) and the individual spring contacts so as to be detachable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to adjusting a delay time of a clock distribution system of an information processing device.

[0002]

2. Description of the Related Art Conventionally, this kind of delay time adjustment uses a delay time adjusting circuit composed of an element having a plurality of outputs having different delay times for one input and a changeover switch, or a plurality of delay time adjusting circuits. The delay time is adjusted by a method of switching the connection of a plurality of delay elements having a certain delay time (hereinafter referred to as fixed delay elements) according to the adjustment value.

[0003]

In the conventional method described above, the delay time adjusting circuit using elements having different delay times requires a large mounting space because of the large shape of the changeover switch. There is a drawback that the device performance is deteriorated due to deterioration and lengthening of wiring. In addition, although the fixed delay element method has no problem in electrical characteristics, a large number of ground terminals (hereinafter referred to as GND terminals) are required for one element in terms of mounting, and a certain mounting space is required although it is not as large as that of the delay time adjusting circuit. It is necessary, and there is a drawback that, especially when trying to mount a plurality of these fixed delay elements within a certain range, it may be impossible due to the external restrictions of the fixed delay elements.

An object of the present invention is to provide a delay element package which can be mounted within a certain range without deterioration in electrical characteristics and device performance.

[0005]

A first delay element package of the present invention is detachably attachable to a plurality of delay elements having an electrical delay time and an input terminal, an output terminal and a ground terminal of each delay element. An external input pin, an external output pin, and an external ground pin to be connected are provided and a base body that detachably holds the delay element.

In the second delay element package of the present invention, the number of external ground pins provided on the base is smaller than the total number of ground terminals of the delay elements held on the base.

[0007]

In the first delay element package, the delay element can be exchanged to adjust the delay time, so that a changeover switch or the like is unnecessary, a mounting space can be reduced, and deterioration of performance can be reduced.

Since the second delay element package has a small number of external ground pins, the mounting space can be further reduced and the deterioration of performance can be further prevented.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows a first delay element package of the present invention.
FIG. 2 is a perspective view of the embodiment, and FIG. 2 is a plan view of FIG.

This delay element package comprises a base 6 and delay elements 7, 8 and 9.

The delay elements 7, 8 and 9 are delay elements having an electrical delay time, and the delay element 7 is a ground terminal (hereinafter referred to as GN).
71 and 74, an input terminal 73 and an output terminal 72, a delay element 8 having GND terminals 81 and 84, an input terminal 83 and an output terminal 82, and a delay element 9 having a GND terminal 9
1, 94, an input terminal 93 and an output terminal 92 are provided,
Each terminal also serves as a pad. The base 6 is mounted on the upper surface of the mounting portion 1.
It is equipped with 0, 11, 12 and an external ground pin (hereinafter G
ND pins) 1, 5 and external input pins (hereinafter referred to as input pins) 2, 3, 4 are provided, and GND pins 1 ₁ , 5 ₁ and external output pins (hereinafter referred to as output pins) 2 are provided on the other side surface.
It is equipped with ₁ , 3 ₁ , and 4 ₁ . Mounting parts 10, 11 and 12
Are spring contacts 101, 102, 103, 104, respectively.
And 111, 112, 113, 114 and 121, 122,
123, 124 are provided and delay elements 7, 8, 9 are provided.
Are detachably mounted by the spring contacts of the mounting portions 10, 11, and 12, respectively. GND pins 1, 1 ₁ , 5, 5
₁ is a spring contact 101, 103, 111, 113, 121, 12 connected by wiring through a bus bar (not shown)
3, the delay terminals 7, 8 and 9 have GND terminals 71 and 7
4, 81, 84, 91, 94 are connected by contact. The input pins 2, 3 and 4 are connected to the input terminals 73, 83 and 93 of the delay elements 7, 8 and 9 by contact by spring contacts 103, 113 and 123 respectively connected by wiring, and the output pins 2 ₁ , 3 ₁ , 4 ₁ are similarly connected to the spring contacts 102, 112, 12 respectively by wiring.
2, the output terminals 72, 82 of the delay elements 7, 8, 9 are
Connected to 92 by contact. This delay element package has four GND pins, and when two GND pins are used for each delay element, the number of GND pins is reduced as compared with the case where three delay elements are required for six. is doing.

In the delay element package of this embodiment, since the delay element can be replaced if necessary, a changeover switch or the like for adjusting the delay time is not required, and the number of GND pins can be reduced, so that the mounting space is small and the wiring is small. There is little deterioration of electrical characteristics caused by the lengthening.

FIG. 3 shows a second delay element package of the present invention.
It is a perspective view of an Example.

The first embodiment is in the form of a so-called dual in-line package, but this embodiment is similar to the delay element package of FIGS. 1 and 2 except that it is in the form of a single in-line package. It is composed. That is, the mounting portion 30 of the base body 16,
Delay elements 17, 18 and 19 are detachably mounted by respective spring contacts (not shown) of 31 and 32.
Pins 21, 25, input pins 22, 23, 24, output pins 22 ₁ , 23 ₁ , 24 ₁ and delay elements 17, ₁ respectively
Connections to terminals 8 and 19 (not shown) are made in the same configuration as the delay element package of FIG. This delay element package has two GND pins 21, 25.
From each delay element 17, 18, 1 via a bus (not shown)
Since it is connected to the GND terminal of 9, the number (2) is far smaller than the case where the GND pin is provided for each delay element (6).

The delay element package of this embodiment has a smaller number of GND pins than that of the first embodiment and has a structure elongated in the height direction, so that the mounting space in the plane direction is further increased. It has a reducing effect.

[0017]

As described above, in the first delay element package of the present invention, a plurality of delay elements are removably mounted on the base body so that the delay elements can be exchanged and the delay time can be adjusted. Since the changeover switch of the delay element is unnecessary, the mounting space can be small, and the deterioration of the performance such as the deterioration of the electrical characteristics due to the long wiring can be prevented.
In addition, since the number of external ground pins is reduced in the second delay element package, there is an effect that mounting space and performance deterioration are further reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of a delay element package according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a perspective view of a second embodiment of a delay element package according to the present invention.

[Explanation of symbols]

1, 1 ₁ , 5, 5 ₁ , 21, 25 GND pins 2, 3, 4, 22, 23, 24 Input pins 2 ₁ , 3 ₁ , 4 ₁ , 22 ₁ , 23 ₁ , 24 ₁ Output pins 6, 16 Substrate 7, 8, 9, 17, 18, 19 Delay element 10, 11, 12, 30, 31, 32 Mounting portion 71, 74, 81, 84, 91, 94 GND terminal 72, 82, 92 Output terminal 73, 83 , 93 input terminals 101, 102, 103, 104, 111, 112, 1
13, 114, 121, 122, 123, 124 Spring contact

Claims (2)

[Claims] 1. A delay element package used for adjusting a delay time of a clock distribution system of an information processing apparatus, comprising a plurality of delay elements having an electrical delay time, and an input terminal and an output terminal of each delay element. And a grounding terminal provided with an external input pin, an external output pin, and an external grounding pin detachably connected to the grounding terminal, and a base body detachably holding the delay element. 2. The delay element package according to claim 1, wherein the number of external ground pins provided on the base is smaller than the total number of ground terminals of the delay element held on the base. Element package.