BIPOLAR TRANSISTORS CROSS REFERENCE. Industry SGS-THOMSON SGS-THOMSON standard replacement nearest preferred Industry SGS-THOMSON SGS-THOMSON standard replacement nearest preferred. 44 / 47. SGS110 MJD112T4 SGS111 MJD112T4 SGS112 MJD112T4 SGS115 SGS125 SGS121 MJD122T4 SGS122 MJD122T4 SGS125 SGS125 …
How measure hie of a bipolar transistor? | Electronics Forum …
2012年6月17日 · hie is not used to calculate the voltage gain of a transistor. It is the input impedance. It is shown on a graph for Fairchild's 2N3904 little transistor and is about 3.8k ohms when the collector current is 1mA and is about 500 ohms when the collector current is 10mA. hie is affected by the amount of hfe and amount of base current of a transistor.
difference between a bipolar transistor and a mosfet?
2005年6月3日 · For information, a bipolar transistor is basically a current amplifier, and a MOSFET is basically a voltage controlled current amplifier. Both are used in completely different ways. MOSFET stands for Metal Oxide Semiconductor Field Effect Transistor.
How measure hie of a bipolar transistor? | Page 2 | Electronics …
2012年6月17日 · Quote: However, bipolar transistors have a small internal resistance built into their Emitter region called Re . The transistors semiconductor material offers an internal resistance to the flow of current through it and is generally represented by a small resistor symbol shown inside the main transistor symbol.
Soldering a transistor: is it possible to blow it?
2005年8月15日 · Many years ago (1960s), when transistors were the new thing, the advice was to use a heat shunt on the legs of the transistor when soldering it. This kept the heat from conducting up the wire and into the transistor. Imagine my horror when I saw a …
How does a transistor amplify current or voltage?
2010年7月23日 · The transistor is able to control a high current flowing thru the transistor from collector to emitter by a small current current flowing from base to emitter, so its said to have a current gain. The transistor does not create the current, it simply controls the current flowing around the loop.
MOSFET STD85N3LH5 Bipolar Totem-pole Driver Circuit
2021年10月7日 · A transistor connected as an emitter follower has no voltage gain; in fact in that configuration, you lose about 0.6 - 0.7V from both the maximum and minimum voltages. To get operation "outside" the MCU supply, add another NPN transistor or small FET between the MCU and driver; base (via resistor) or gate driven from the MCU and the collector ...
Transistor Operation | Electronics Forum (Circuits, Projects and ...
2002年7月19日 · A phototransistor is a bipolar junction transistor which has a special light sensitive base region. A lens in the transistor case focuses light on this special base region. The light striking the lens controls the value of collector current by changing the emitter-to-collector resistance in proportion to the amount of light shining on the base ...
Bipolar Transistor Properties | Electronics Forum (Circuits, Projects ...
2015年6月28日 · I have a catalog with specifications on bipolar transistors. Unfortunately I'm unsure of certain properties that are listed. Different catalogs seem to label their properties differently. The properties are as follows: POL: NS or PS …
Simulating transistor junction breakdown | Electronics Forum …
2011年8月29日 · The E-B would break down injecting current into the B which would turn the inverted NPN on, and it would stay on until the current decayed to a certain level then the transistor would reset. I asked an old Prof why it didn't recover immediately when the voltage dropped below the E-B breakdown voltage and he pointed out that C-E breakdown ...