JPS60223220A - Injector current supply circuit of i2l circuit - Google Patents

Abstract

PURPOSE:To reduce the current losses of a current supply route and also to omit an element needed to set a current by obtaining an injector current of an I<2>L circuit from a linear circuit which is set adjacently to the I<2>L circuit. CONSTITUTION:A linear circuit 30 of constant current characteristics is provided adjacently to an I<2>L circuit 2 and serves as a signal processing means which works in response to the output signal of the circuit 2 or a processing means for various signals applied to the circuit 2. The circuit 30 is also used as an injector current supply source set between a current supply line 21 serving as an injector current supply terminal of the circuit 2 and a power supply terminal 29. In such constitution, the current consumed by the circuit 30 can be used by the circuit 2 as an injector current. Thus it is possible to reduce the power losses and omit a current control means such as a resistance, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on an integrated I ” L (Integrated I
This invention relates to an improvement of an injector current supply circuit for an injection logic circuit.

FIG. 1 shows a configuration example of an injector current supply circuit of a conventional I2L circuit.
．． 6.8.10.12.14.16.1B constitutes a gate. That is, transistor 4.6.8, lO
is the injector current supply terminal 2 common to its emitter
o are formed, their bases being commonly connected to a reference potential point (GND), and their collectors being individually connected to the bases of the transistors 12, 14, 16, 18. An input signal terminal 22 is formed at the base of the transistor 12, an output terminal 24 is formed at the collector of the transistor 18, and each transistor 12.1
4.16.1B emitters are commonly connected to the reference potential point (G
ND).

A constant voltage source 26 is connected as a current supply means to the injector current supply terminal 20 of the 12L circuit 2 through a resistor 28, and a current value 2 is obtained by multiplying the required current i per gate by the number of gates. It is set using a resistor 28.

In this case, the ILL circuit 2 has a structure that corresponds to the base-emitter voltage of a lateral PNP transistor (0.6 to 0.8
V), but if it is mixed with other interfaces or linear circuits (not shown), a higher voltage will be used for the power supply voltage, and an injector current supply circuit will be provided separately from the other circuits. Therefore, most of the injector current becomes reactive power and is lost.

For example, in the case of an I2L circuit with power supply voltage Vcc = 5 V% and 11000 gates, the current per gate is 10 μA.
In this case, 50 mW of power is consumed, but only a few dozen percent of it is used, and 80% is power loss.

In a 12L circuit that is installed together with a linear circuit, this invention reduces power loss in the supply path by supplying injector current from the linear circuit installed in the surrounding area, and also sets the current. The purpose is to eliminate the need for elements for

That is, the present invention is characterized in that a linear circuit placed adjacent to the 12L circuit is used as its injector current source.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 2 shows an embodiment of the injector current supply circuit of the 12L circuit of the present invention, and parts common to the circuit shown in FIG. 1 are given the same reference numerals.

In FIG. 2, a constant current linear circuit 30 formed adjacent to the 12L circuit 2 is configured as an injector current supply means for the I2L circuit 2.

That is, this linear circuit 30 is configured to supply injector current to various signal processing means added to the 12L circuit 2 or a signal processing means that responds to the output signal of the I2L circuit 2, and is configured to supply injector current. Current supply line 21 as an injector current supply terminal
and the power supply terminal 29.

In this linear circuit 30, a bleeder resistor 32 and a transistor 34 configured as a diode constitute a constant current source, and the transistor 34, the transistor 36 .
38 constitutes a current inversion circuit, and the constant current flowing through the transistor 34 is inverted and flows through the transistors 36 and 38 individually.

The transistors 40.44 constitute a differential amplifier, and the input terminal 4 formed at the base of each transistor 40.42
A signal to be amplified is added to 4A and 44B.

Transistors 46 and 48 are current inversion circuits that constitute a constant current load of the differential amplifier, and transistor 50 constitutes a level shift circuit. The level-shifted output of transistor 50 is applied to the base of transistor 52, and the collector output of transistor 52 is supplied to circuit means not shown.

A power supply (not shown) is connected between the power supply terminal 29 and the reference potential point (GND), and Vcc is the voltage thereof.

With this configuration, the current consumed by the linear circuit 30 installed adjacent to the 12L circuit 2 can be supplied to the 12L circuit 2 as an injector current, and the power loss that is conventional can be reduced. No current adjustment means such as resistance is required.

Moreover, according to such a configuration, as shown in FIG.
12L circuit 2A in the center of semiconductor integrated circuit (IC>54)
, 2B, 2G, and 2D, and linear circuits 30A, 30B, and 30C130D are installed around the linear circuits 30A, 30B, as shown by arrows a s b -, C, and d.

11+12L circuit 2 closest to them from 30C, 30D
Injector current can be supplied to A, 2B, and 2C12D. Moreover, by doing this, the layout becomes easy, and the subdivision prevents unevenness of current per gate, which not only prevents power loss but also realizes highly reliable logic operation.

In addition, in the example, a case was explained in which a linear circuit was installed correspondingly to a 12L circuit, but for a 1"L circuit, a linear circuit with a current consumption corresponding to the injector current was installed in an overlapping manner. For other linear circuits, the current outflow portion is grounded directly or via a diode to match the interface.

As explained above, according to the present invention, the following effects can be obtained.

Since the +11J2L circuit is usually installed together with the linear circuit, the existing linear circuit can be used as the injector current supply means, and no special circuit design is required.

The operating speed of the +2+12L circuit is determined by the injector current, and the faster it is, the higher the power consumption tends to be, but the current used in the linear circuit can be used effectively,
The degree of freedom in setting the injector current is expanded. Furthermore, linear circuits formed in a mixed manner rarely require all of the power supply voltage, and their current supply capability can be effectively utilized.

(3) In addition, elements such as a constant current circuit and an external injector current adjustment resistor, which are required in ICs with a wide voltage range to supply the injector current, are not required.
External terminals (external injector current supply terminals) can be reduced.

(4) Reactive power can be reduced and reliability of logic operation can be improved.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a conventional 12L circuit injector current supply circuit, FIG. 2 is a circuit diagram showing an embodiment of the 12L circuit injector current supply circuit of the present invention, and FIG. 3 is a circuit diagram of the 12L circuit of the present invention. FIG. 3 is an explanatory diagram showing an application example of an injector current supply circuit. 2.2A, 2B, 2C, 2D...12L circuit, 30.
30A, 30B, 30C, 30D...linear circuit. Figure 1 Figure 2

Claims (1)

[Claims] The linear circuit placed adjacent to the 12L circuit is
An injector current supply circuit for an I"L circuit, characterized in that the injector current source supplies an injector current for a 2L circuit.