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Regulator circuit and semiconductor device therewith

A technology for regulating circuits and semiconductors, applied in semiconductor devices, electric solid state devices, semiconductor/solid state device components, etc., can solve problems such as damage to output stage transistors, and achieve the effect of improving electrostatic resistance

Inactive Publication Date: 2007-06-27
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inconveniently, in these circuits, the output stage transistors are prone to damage due to transient charges (static electricity) flowing through the output terminals
Unfortunately, this inconvenience cannot be completely overcome using any of the techniques disclosed in the above patent publications

Method used

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  • Regulator circuit and semiconductor device therewith
  • Regulator circuit and semiconductor device therewith
  • Regulator circuit and semiconductor device therewith

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0047] First, the regulating system (regulating circuit) of the first embodiment of the present invention will be described. FIG. 1 is a circuit diagram of an adjustment system 1 of a first embodiment.

[0048] The regulating system 1 is constituted by an output stage transistor TR1, electrostatic protection transistors TR1 and TR2 as electrostatic fault protection elements, and a control circuit 10 that controls the output stage transistor TR1. The output stage transistor TR1 and the electrostatic protection transistors TR2 and TR3 are all NPN-type bipolar transistors.

[0049] The regulating system 1 has a pair of inputs 11 and 12 and a pair of outputs 13 and 14 . A DC voltage supply, not shown, is connected to the output terminals 11 and 12 so that a current voltage from the DC voltage supply is applied between the input terminals 11 and 12, with the input terminal 11 being on the positive voltage side. An external circuit not shown is connected to the output terminals 13...

no. 2 example

[0095] A second embodiment of the present invention will be described below. Fig. 6 is a circuit diagram of an adjustment system 1a according to a second embodiment of the present invention. The difference between the regulating system 1a and the regulating system 1 shown in FIG. 1 is that the base of the electrostatic protection transistor TR2 is not connected to the control output terminal 16 of the control circuit 10, but is connected to the grounding line 15; the two regulating systems are otherwise is similar.

[0096] Connecting the base of the electrostatic protection transistor TR2 to the ground line 15 makes it possible to prevent transient charges input via the output terminal 13 from flowing into the control circuit 10 . In FIG. 6, a resistor (not shown) may be inserted in series between the base of the ESD protection transistor TR2 and the ground line 15; in other words, the base of the ESD protection transistor TR2 may be connected to the ground line 15 via the r...

no. 3 example

[0100] A third embodiment of the present invention will be described below. Fig. 7 is a circuit diagram of a regulating system 1b of a third embodiment of the present invention.

[0101] The regulating system 1b is basically constituted by an output-stage transistor TR1a, electrostatic protection transistors TR2a and TR3 as electrostatic fault protection elements, and a control circuit 10 that controls the output-stage transistor TR1a. The output stage transistor TR1a and the electrostatic protection transistors TR2a and TR3 are PNP-type bipolar transistors. That is, compared with the regulation system 1 shown in FIG. 1, in the regulation system 1b, the output stage transistor TR1 and the static electricity protection transistor TR2 are replaced with both the PNP-type output stage transistor TR1a and the static electricity protection transistor TR2a.

[0102] Similar to the regulating system 1 shown in FIG. 1 , the regulating system 1 b has a pair of input terminals 11 and 12...

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PUM

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Abstract

A regulator circuit including an output-stage transistor for supplying a current to an external circuit has an electrostatic protection transistor formed in parallel with the output-stage transistor. The base of the electrostatic protection transistor is connected to, for example, the base of the output-stage transistor, or alternatively to a ground line or to the emitter of the electrostatic protection transistor itself.

Description

technical field [0001] The present invention relates to an adjustment circuit and a semiconductor device combined with the adjustment circuit, in particular to an adjustment circuit with electrostatic fault protection capability and a semiconductor device combined with the adjustment circuit. The present invention also relates to a method of manufacturing such a semiconductor device. Background technique [0002] Fig. 9 shows a conventional regulation system (regulation circuit) provided with an electrostatic fault protection element for preventing electrostatic discharge (ESD) of output stage transistors. As shown in Figure 9, in order to prevent the transient current caused by the static electricity through the input or output terminal from damaging the output stage transistor TR101, static protection transistors TR102 and TR103 are set as electrostatic fault protection elements, one of which is connected to the input terminal between ground and the other between the outp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/02H01L23/60
CPCH01L27/0259
Inventor 细川诚福岛稔彦福永直树
Owner SHARP KK