intelligent semiconductor characteristic curve instrument

[locky_z]

I'm doing My Project is "Computer semiconductor characteristic curve" (My english is bad.So Just Show the test result.)

My project link(China) is http://www.hifidiy.net/bbs/boke.asp...owtopic.92.html

This instrument can test MOSFET / JFET / transistor / diode / SCR / resistance....

It can display the
1."Ic->Hfe" curve
Example 2SA733(PNP) "Ic->Hfe" curve:

and 2SA1386's "Ic->Hfe" curve:


2."Vbe(Vgs)->Ic(Id)" curve
example MTH15N20 "Vgs)->Id" curve


2SK246 Vgs->Id curve


3."Vce(Vds)->Ic(Id)" curve
example 2SC3519's "Vce(Vds)->Ic(Id)" curve


IRF9610 "Vds->Id" curve


4. 3-Terminal Regulator's Vi-Vo curve
Example 78L05



The Project use to matching Devices is very excellent
this pict show how to match 9 pair 2SK246s,It Test 9 2SK246s and Show their Vgs-Id curve

from the pict,you can see the 4 & 6 curve is match, and the 2 & 5
is match.
By this way ,you can match device precision.

The project use 5 integrate circuit, They's:
1 chip LTC1090(8 channel 10Bit ADC with SPI interface)
1 chip M62359 (8 channel 8 Bit DAC with SPI interface)
3 chips TDA2030 as 3 channels(B C E) programme Push-Pull Power Supply
1 chip 74HC595 as control relay
1 chip TC4050 with PC interface buffer

the instrument don't use MCU,just use PC's parallel port (LPT) to controle the DAC & ADC

[john curl]

Looks interesting.

[jacco vermeulen]

Locky-Z,

the link you posted to diyhifi.net does not work.
Can you post the link again ?

Are you willing to share the design, free or selling it ?

(you guys should install the Chinese language into your operating system, lots of great stuff on diyhifi.net, including top parts)

[locky_z]

the result is here
http://www.hifidiy.net/bbs/dispbbs.asp?boardID=2&ID=31462&page=1

the sch public here
http://www.hifidiy.net/bbs/boke.asp?locky_z.showtopic.92.html

but software is shareware.

I have a little LTC1090 & M62359 chips, just only enought to develope and use for me.
So the board is not sell.

[jacco vermeulen]

Originally posted by locky_z
but software is shareware.

There is a ready made curve tracer software package ?
Not written in G or LabTracer ?

[locky_z]

the Circuit

Measurement of the curve, including :
BJT (including Optocoupler) :
PNP NPN of Hfe->Ic curve (measurement of the curve is in constant Vce conditions)
PNP NPN of Vbe->Ic curve (measurement of the curve is in constant Vce conditions)
PNP NPN Vce->Ic curve (constant Ib)
P-type or N-type MOSFET and JFET :
Vgs - Id curve (under the conditions of constant Vds)
Vds - Id curve (under the conditions of constant Vgs)
Diodes / Regulators diode / LED positive, reverse curve
positive and negative 3-Terminal voltage regulator IC:
Input voltage->output voltage characteristic curve
Output voltage->current characteristic curve liabilities
also capable of measuring SCR trigger current, voltage trigger, pressure drop, maintain current parameters (not curve)

Below are the same measurement a 2SC3519 high-power BJT curve
Ic = 300-1800mA scope of Hfe ->Ic curve

the IC=20-300mA scope of Hfe - Ic curve

Ic=2-30mA scope of Hfe - Ic curve

Ic=0.5-3mA scope of Hfe - Ic curve

Ic = 50-700uA scope of Hfe - Ic curve



The same 2SC3519 of Vbe-IC characteristic curve
Ic = 100-1900mA

Ic = 5-160mA

Ic = 0.3-14mA

Ic = 10uA - 1mA



Just look again at the output characteristic curve Vce->Ic
Ib constant measurement, Ib = 1-9mA

Ib = 0.1-1mA

Ib = 10uA - 100uA

Ib = 1uA - 10uA

[locky_z]

Below are the same screen shows 12 pic 2SA1386 of Hfe - Ic characteristic curve and Vbe-Ic curve and Vce - Ic curve





By the same measurement conditions , you can show more Semiconductor's curve on same screen.
From the screen ,you can match the most matching Semiconductor



Below is the measurement IRFI740 Vgs from 3V to 3.9V step 0.1V. measuring the Vds - Id characteristic curv

Below are the same measurement of the Vgs-curve Id (Id = 0-1700mA)

Vgs-curve Id (Id = 0-25mA)


Id = 0-1mA




Measurement of P-MOS IRF9630 the Vgs->Id curve




Measuring diode in a variety of different current of VF characteristics (1N5401 BYV32 FR305 1N4 001 MBR3060 1N4148)







Measuring 6 V Regulators diode positive / negative characteristic curve

[locky_z]

At the same screen to display the JFET's Vgs->Id and Vds->Id characteristic curve (2SK 373GR)


Let's look at different suffix of 2SK246 the Vgs->Id curve (GR and Y suffix)



Exchange the same 2SK246's D, S pin and measurement they Vgs->ID curve



The system also is a characteristic of different polarity to contrast the characteristics of the tubes, For example, the following is the system provides functional polarity reversal and contrast 2SK246GR and 2SJ103GR the Vgs->ID characteristics curve

[Cliff Schuring]

Does anyone know of any active links for Lock_Z DIY curve tracer and software. This project looks like a cool unit for using at home with out all the major expenses of obtaining a curve tracer from E-Bay. If not does any one know of a project using a USB measurement unit-( the cheaper ones) for doing this with say relays on the digital control ports.

[locky_z]

The schematic had changed a little,see below.

the software can download from
http://bbs.hifidiy.net/attachment.php?aid=246124
http://bbs.hifidiy.net/attachment.php?aid=246125

It is Chinese language version , only support one curve trace.

the board no MCU so it not support USB interface,only support LPT interface