Advantages of MOSFET Over BJT In the field of electronic components, both Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) and Bipolar Junction Transistors (BJTs) are widely used. However, MOSFETs have gained significant popularity in modern electronics due to a number of inherent advantages over BJTs. The following sections highlight the key benefits of MOSFETs in comparison to BJTs, … Read more
AC (alternating current) and DC (direct current) are two fundamental types of electrical current with distinct characteristics. AC current periodically changes direction, reversing its polarity in a sinusoidal manner. This reversal occurs at a frequency typically measured in hertz (Hz), such as 50 Hz or 60 Hz in household electricity. In contrast, DC current flows … Read more
A pull-down resistor is a resistor connected between a signal line and ground in a digital circuit. Its purpose is to ensure that the signal line remains at a defined low (logic 0) state when no active device is connected to it. In other words, it pulls the voltage of the signal line down to … Read more
Wiring a resistor in a circuit involves connecting it between two points to control the flow of electrical current. Typically, resistors have two terminals that are not polarity-sensitive, meaning they can be connected in either orientation within a circuit without affecting their functionality. To wire a resistor, you simply insert each lead into the circuit … Read more
What are the differences between UJT and FET ? The differences between UJT (Unijunction Transistor) and FET (Field-Effect Transistor) lie primarily in their construction and operating principles. A UJT is a three-terminal semiconductor device with a unique structure consisting of a bar of lightly doped N-type material and two heavily doped P-type regions. It operates … Read more
A capacitor offers infinite resistance at steady state because, in a DC (direct current) circuit, once it is fully charged, it acts as an open circuit to the steady flow of current. This occurs because a capacitor charges and stores electrical energy in the form of an electric field between its plates. As the capacitor … Read more
A light dependent resistor (LDR), also known as a photoresistor or photocell, is a type of resistor whose resistance decreases with increasing incident light intensity. This change in resistance is due to the interaction of light photons with the semiconductor material within the LDR. When exposed to light, more photons are absorbed by the semiconductor, … Read more
In electronic circuits, it is common practice to earth (ground) one of the two plates of a capacitor for several reasons. One primary reason is to establish a stable reference point for voltage levels within the circuit. By grounding one plate of the capacitor, this plate is connected to the earth potential, which is typically … Read more
In a capacitor, the steady state current refers to the condition where the rate of change of charge on the capacitor plates becomes zero over time. This means that once the capacitor is fully charged (or discharged), the current flowing into or out of the capacitor ceases to exist. In other words, the steady state … Read more
A bias resistor in electronics is used to establish a specific operating point, or bias point, for active components such as transistors or operational amplifiers within a circuit. The resistor is typically connected to the base or gate of a transistor or the input of an operational amplifier to set the DC voltage level at … Read more