What is an ideal transistor?
An ideal transistor switch would have infinite circuit resistance between the Collector and Emitter when turned “fully-OFF” resulting in zero current flowing through it and zero resistance between the Collector and Emitter when turned “fully-ON”, resulting in maximum current flow.
What is true transistor?
Hint: A transistor is a semiconductor device which is commonly used as a switch in electronic circuits and as an amplifier. It consists of three regions called Emitter, Base and Collector. The charge-carriers originate in the Emitter region and travel across the Base to the Collector region.
How to choose the right transistor for an amplifier?
Current is the ratio of the base current to the collector current and a measure of the amplifying ability of the transistor. If you want to use the transistor as an amplifier, then choose a transistor with higher current gain. 3. Collector-Emitter Voltage (VCEO)
How is the type number of a transistor determined?
The type number of a transistor is a unique number given to every transistor. By using the type number of a transistor, we can search for its specifications and features. There are three main numbering systems, i.e. JIS, Pro Electron, and JEDEC.
Is it necessary to replace a transistor with a higher gain?
Choosing a replacement transistor with approximately the same current gain is necessary. Normally it is not a problem to choose a replacement transistor with a higher gain. Often a lower current gain may be acceptable. Frequency limit: The upper frequency limit for a transistor is normally quoted as its ft.
How to select a transistor to ensure safe?
Therefore, the judgement should be made by considering SOA line shift by 60% toward the smaller current direction. Likewise as above, the calculation is done as below. Accordingly, the judgement should be made by considering SOA line shift by 37.5% toward the smaller current direction.