JPH1074892A - Electronic part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an electric circuit adaptable to specification changes, without modifying a printed board and increasing the area by a method, wherein a three-terminal electronic part is used, and two of the three terminals of the electronic part are short-circuited or connected together with a resistor of prescribed resistances. SOLUTION: A transistor 11 as a three-terminal part is imcapable of outputting signals 13, which are inputted through a terminal C, through a terminal B as they are, so that the transistor 11 is replaced with an electronic part 42 in a transistor package, wherein the two terminals B and C of that part 42 are short-circuited with an inner resistor 43 of zero ohm resistance, a terminal A is kept open, and a resistor 12 is eliminated. By this setup, an electric circuit is mode adaptable to specification changes, without enlarging a printed board in area or modifying a printed board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to electronic components and the like.

[0002]

2. Description of the Related Art In FIG.
2 is an input signal, 33 is an insurance resistor, 34 is a resistor, and 35 is a signal processing circuit.

The circuit shown in FIG. 5 inverts a signal 32 input from the base of a transistor 31 and
1 is a circuit that outputs the data from the collector to the next circuit. When this circuit is mounted on a printed circuit board, a sudden change in the specification (for example, without inverting the signal 32 and maintaining the same polarity in the next circuit) In this case, a pattern is provided so that the resistor 33 can be mounted.
When the pattern for the resistor 33 is not provided, the printed circuit board is modified to satisfy the specifications.

In Japanese Utility Model Laid-Open Publication No. 2-128376, one or more electronic elements and jumper wires are combined into one package, which aims at improving the pattern efficiency of a printed circuit board.

[0005]

However, if the insurance pattern for the resistor is provided to all the signal lines of the circuit as described above, there is a problem that the area of the printed circuit board increases. In addition, if there is a sudden change in specifications without an insurance pattern, parts cannot be mounted by an automatic machine unless the printed circuit board is corrected, so that the schedule of the product itself is delayed. In addition, actual Kaihei 2-1
In Japanese Patent No. 28376, one or more electric elements and jumper wires are combined in one package. Even if this part is used, when the electric element itself has to be deleted, it is input to the electric element,
Certain electrical signals cannot be transmitted to subsequent circuits. In addition, when the electrical signal is transmitted to a subsequent circuit after removing the electrical element, there is a problem that a printed circuit board needs to be changed.

[0006]

SUMMARY OF THE INVENTION The present invention provides a three-terminal electronic component (for example, a transistor) which has been used in the past.
In the same manner as described above, two of the three terminals are short-circuited, and an electronic component having one open terminal is replaced with a three-terminal electronic component which has been conventionally used, thereby causing a failure in a circuit (for example, a conventional three-terminal electronic component). Even if the electronic components at the terminals are deleted, the signal cannot be transmitted to the subsequent circuit.). By using such three-terminal electronic components, the insurance pattern can be reduced in a circuit using three terminals, so that the area of the printed circuit board is not increased and the printed circuit board is not changed suddenly. It can respond to various specification changes.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The first invention of the present invention is an electronic component having three terminals, wherein two terminals are short-circuited or connected with a predetermined resistance value, respectively. This has the effect that the specification of the circuit can be easily changed without increasing or changing the area of the printed circuit board.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electronic component according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, and 4. FIG.

(Embodiment) In FIG. 1, reference numeral 11 denotes a transistor, 12 denotes a resistor, 13 denotes an input signal, and 14 denotes a signal processing circuit.

In FIG. 2, 21 is a resistor, 22 is an input signal, and 23 is a signal processing circuit. In FIG. 3, 41 is a commonly used transistor, A, B, and C are connection terminals of generally used transistors.
42 is an electronic component in one embodiment of the present invention, 43 is a resistor built in the electronic component in one embodiment of the present invention,
Reference numerals a, b, and c denote connection terminals of the electronic component in one embodiment of the present invention.

When the circuit of FIG. 1 must be changed as shown in FIG. 2, the transistor 11 has a structure like 41, so that the signal 13 inputted from C cannot be outputted from B as it is. Can not. Therefore, two terminals are short-circuited in the electronic component denoted by reference numeral 42 and the transistor package (a 0 ohm resistor is used for the internal resistor 43).
It can be easily realized without changing the printed circuit board only by exchanging the transistor 11 with a component having one open terminal and removing the resistor 12.

[0012]

As described above, according to the present invention, a three-terminal electronic component is used in which two terminals are short-circuited or connected with a predetermined resistance value. This makes it possible to respond to a change in specifications without increasing the area of the printed circuit board or correcting the printed circuit board.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electric circuit according to an embodiment of the present invention.

FIG. 2 is a block diagram of an electric circuit according to an embodiment of the present invention.

FIG. 3 is a configuration diagram of an electronic component according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of an electronic component according to an embodiment of the present invention.

FIG. 5 is a block diagram of a conventional electric circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Transistor 12,21 Resistance 13,22 Input signal 14,23 Signal processing circuit 41 Transistor 42 Electronic component 43 Resistor

Claims (1)

[Claims] 1. An electronic component having three terminals, wherein two terminals are short-circuited or connected to each other with a predetermined resistance value.