JPH0425710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a semiconductor integrated circuit device, and more specifically, for example, an integrated injection logic device.
Logic: Hereinafter abbreviated as IIL. The present invention relates to the arrangement and wiring of the reset terminals of a semiconductor integrated circuit device in which a plurality of logic circuits constituted by highly integrated elements such as .

Conventional Structure and Problems The IIL circuit is a bipolar highly integrated circuit device, also known as a low power consumption circuit, and has been widely used in recent years. When a logic circuit made up of this IIL circuit, for example, multiple flip-flop circuits are connected to form a frequency divider circuit, approximately the same pattern is placed consecutively on the same semiconductor substrate. be done.

Conventionally, when integrating semiconductors using IIL circuits, all of the transistors making up the logic circuit were often arranged in a current injection region called an injector, facing in the same direction. Moreover, as the degree of integration increases, such patterns must be arranged in several rows or in several stages on a semiconductor substrate. However, in such an arrangement, although the common connection wiring of the reset terminal, which is often used, can be done on the opposite side of the injector, the distance between the pattern and the adjacent pattern is determined by a large transistor, and a small transistor is used. A gap was created around the periphery, making it impossible to use the semiconductor substrate effectively. Further, in some cases, it is necessary to provide a relatively high concentration diffusion layer to connect the reset terminals in common. However, these things are contrary to the direction of high integration.

OBJECTS OF THE INVENTION The present invention provides a semiconductor integrated circuit device that overcomes the above-mentioned disadvantages.

Structure of the Invention The present invention provides a semiconductor integrated circuit device in which a plurality of logic circuits each having an input terminal, an output terminal, and a reset terminal are arranged facing an injector current wiring, wherein the wiring for the reset terminal is connected to the injector current supply wiring. They are placed adjacent to each other.
This not only provides a highly integrated semiconductor integrated circuit device, but also facilitates wiring between reset terminals.

DESCRIPTION OF EMBODIMENTS FIG. 1 shows a unit block diagram of a logic circuit.
In the figure, 1 is a flip-flop circuit, 2 is its input terminal, 3 is an output terminal, and 4 is a reset terminal.

FIG. 2 shows a specific circuit example in which the unit block diagram of FIG. 1 is constructed by an IIL circuit of transistors 5 to 12. Note that in FIG. 2, the injector current supply transistor 13 in FIG.
Furthermore, the collector terminal 15 of the transistor 13 is connected to the base B of each of the transistors 5 to 12.
It is omitted that it is connected to.

Also, the emitter terminal 14 of the transistor 13
corresponds to a so-called injector terminal, and an injector current is supplied from this injector terminal to each transistor to operate the IIL circuit.

FIG. 4 is a circuit block diagram showing a part of a frequency dividing circuit composed of a flip-flop circuit.
In the figure, 16 and 26 are injector current supply lines, 17 is an input signal line, and 18 and 21 are flip lines.
flop circuit; 19 and 20 are signal output lines of the flip-flop circuit 18; 22 and 23 are flip-flop circuits;
An output signal line of the flop circuit 21 and a reset signal line 24 are provided.

FIG. 5 shows a pattern layout diagram when the frequency dividing circuit of FIG. 4 is integrated into a semiconductor substrate. Here, the same parts as in FIGS. 2 and 4 are given the same numbers. Note that 25 is a window opening of the injector. Two injector current supply wiring 16, 26
Transistors 5 to 12 forming flip-flop circuits 18 and 21 are arranged between them. That is, transistors 7, 12,
10 and 11 are arranged to receive current from the injector current supply wiring 16. On the other hand, transistors 5, 6, 8, and 9 are arranged to receive current from injector current supply wiring 26. That is, each half of the eight transistors from transistor 5 to transistor 12 are arranged in two stages or two columns. 2
Although not shown, the two injector current supply wiring lines 16 and 26 are commonly connected to each other and placed at the same potential.

In addition, although two injector current supply wirings are provided in FIG. 5, and half of the transistors are arranged in each wiring, the invention is not limited to this. For example, the effects of the present invention can be obtained even under a configuration in which all transistors 5 to 12 are arranged on the injector current supply wiring 16 side.

In transistors 5 to 12,
The locations marked with 〓 correspond to the respective base terminals B of each transistor shown in FIG. for example,
The base terminal B of the transistor 5 is the input terminal 2, which is shown to be connected to the input signal line 17. Further, the portions marked with 〓 correspond to the respective collector terminals C of each transistor shown in FIG. For example, if we look at the transistor 5 which has an input terminal 2, there are two collectors C as is clear from Fig. 2, but if we look at the corresponding transistor 5 in Fig. There are two locations and their numbers match.

In FIG. 5, an input signal is applied to input terminal 2 of transistor 5 via input signal line 17. In FIG. The input signal is the flip-flop circuit 1
Transistors 5 to 12 constituting 8
The signal is processed by the transistor 11, and finally the transistor 11
appears at the output terminal 3 of the input signal as a signal with twice the period, that is, half the frequency, of the input signal.

This signal is applied to the input terminal 2 of the flip-flop circuit 21 via the signal output line 19. Note that the signal output line 19 also corresponds to the input signal line of the flip-flop circuit 21. flip
The flip-flop circuit 21 is the flip-flop circuit 1.
8, and its output signal is taken out to the output signal line 22 and supplied to the next stage flip-flop circuit (not shown), which shows a part of the transistor.

Now, in order to obtain a desired frequency-divided signal in a frequency dividing circuit, a reset function is necessary. In the present invention,
Reset terminal 4 is equal to base terminal B of transistor 12. Reset terminal 4, that is, the base of transistor 12 (indicated by The injector current supply wiring 16 is located closest to the injector current supply wiring 16. The extent of this is the flip-flop circuit 2 next door.
A reset signal line 24 for connecting the reset terminal 4 of the flip-flop circuit 1 and the reset terminals (not shown) of the other flip-flop circuits connected in common is connected to the injector current supply wiring 16 and the flip-flop circuit 18, 21 and the internal wiring 27 of other flip-flop circuits (not shown).

A feature of the present invention is that no additional space is required to accommodate the reset signal line 24. That is, if the reset signal line 24
, injector current supply wiring 16 and internal wiring 2
7, the distance between the injector current supply lines 16 and 26 is required to be the same as that shown in FIG. This is because the distance between the two injector current supply wirings is 16 and 26.
It is determined by the sum of the sizes of the two transistors facing each other, and in the pattern arrangement of the present invention, transistor 1
The size is determined by the combined size of transistor 2 and transistor 6, and cannot be made any smaller. In other words, the present invention is capable of providing a semiconductor integrated circuit device in which reset terminals can be wired without causing any problems to the degree of integration.

Although FIGS. 4 and 5 show an example in which flip-flop circuits are arranged in two stages, for example, to configure a 1/525 frequency dividing circuit, flip-flop circuits are required. There is no need to explain that 10 steps are required.

Effects of the Invention As described above, in the semiconductor integrated circuit device of the present invention, between the two injector current supply wirings,
In addition to arranging the logic circuit, the reset terminal of the logic circuit is placed adjacent to the injector current supply wiring, and the wiring that connects the reset terminals is placed between the injector current supply wiring and the internal wiring of the logic circuit. By providing the reset terminals, it is possible to connect the reset terminals without causing any problems to the degree of integration.

[Brief explanation of drawings]

FIG. 1 shows a unit block diagram of a logic circuit. FIG. 2 shows a specific circuit diagram of FIG. 1 configured with an IIL circuit. FIG. 3 shows the injector current transistor of the IIL circuit. FIG. 4 shows a portion of the frequency divider circuit. FIG. 5 shows an embodiment in which the semiconductor integrated circuit device of FIG. 4 is constructed using the semiconductor integrated circuit device of the present invention. 1, 18, 21... flip-flop circuit,
2...Input terminal, 3...Output terminal, 4...Reset terminal, 5-12...Transistor, 13...Injector current supply transistor, 14...Injector (emitter) terminal, 15...Collector terminal, 16 , 26... Injector current supply wiring, 17... Input signal line, 19, 20, 22, 2
3...Signal output line, 24...Reset signal line, 2
5...Injector window opening, 27...Internal wiring.

Claims (1)

[Scope of Claims] 1. In a semiconductor integrated circuit device in which a plurality of logic circuits each having an input terminal, an output terminal, and a reset terminal are arranged facing an injector current supply wiring, the wiring connecting the reset terminal is connected to the injector current supply wiring. A semiconductor integrated circuit device characterized by being adjacent to supply wiring. 2. A plurality of logic circuits each having an input terminal, an output terminal, and a reset terminal are arranged between two injector current supply wirings, and the wiring connecting the reset terminals is adjacent to the injector current supply wiring. A semiconductor integrated circuit device according to claim 1, characterized in that: