Transistors

BJT Open Collector Outputs are really starting to show up more and more in the world of digital chip design, operational amplifiers, and those advanced micro-controller projects we love to tinker with, like Arduino. We often use the BJT open collector outputs to connect with other circuits or to power high-current loads such as indicator […]

An FET Current Source is a specific kind of active circuit which employs a Field Effect Transistor to provide a steady and a constant amount of current to a circuit. Now you might wonder why it is important for us to have a constant current. Constant current sources and their opposite, which we call current […]

In this post you will learn about this amazing BJT device called the Darlington Transistor. It was named after this genius engineer, Sidney Darlington, who came up with the idea. Basically it is like a special combo of two regular NPN or PNP bipolar junction transistors (BJTs) that are hooked up in a clever way. […]

In our earlier discussions we observed that the N-channel Enhancement-mode MOSFET (e-MOSFET) operates effectively when supplied with a positive input voltage. This particular type of MOSFET boasts an exceptionally high input resistance—approaching infinity. This facilitates its use as a switch. This characteristic allows us to interface the MOSFET seamlessly with virtually any logic gate or […]

In this post I will talk about another form of Field Effect Transistor (FET) that is not the Junction Field Effect Transistor (JFET) that you are probably familiar with. This device is known as the Metal Oxide Semiconductor Field Effect Transistor (MOSFET) and is classified as Insulated Gate Field Effect Transistors (IGFET). The MOSFET is […]

In this post I will talk about the Junction Field Effect Transistor, or in short, the JFET. This device is actually a unipolar device, which basically means that it has a pretty quick way of controlling the flow of current between its two electrodes. This happens because of an electric field that kicks in when […]