The Inverter

In the process of designing a lumped element filter, the circuit layout that is usually used to realize the filter is known as the "ladder network". Why ladder? Simply saying, because the layout looks like a ladder. The picture below shows a ladder network that is consisting of only resistors. In a lumped element lowpass …

How to Design Impedance Matching

When designing schematics, impedance matching is an importance process to ensure minimum loss of the design. When a schematic is mismatched, it will result in high reflection of the input signal, this would translate into transfer loss. A schematic that is matched will ensure the lowest possible loss theoretically, that is maximum power transfer. When …

5 Minutes History of Electricity

Thales of Miletus Ever wonder what's the history of electricity, which has become a daily necessity to modern man? To start, we have to look into the history of electromagnetism. The history of Electromagnetism can be categorized into two eras; classical and modern eras. This covers from the classical era of the fundamental laws of …

Asymmetric Impedance Scaling and Frequency Transformation

https://youtu.be/acqtEmFCEjs Asymmetric filters are filters whose response are asymmetric in shape. They are useful for many applications that may require a different requirements between the upper and lower stopband. For example difference in upper/lower cut-off frequency, selectivity and insertion loss. This week video, see an example of an asymmetric filter design that applies impedance scaling …

The Importance of Software Tools in Education

The study of electrical and electronics engineering has always been a race against time. Ask many of the students studying this discipline, they will comment that it has always been a race against time. A Race against Time Generally, there are a lot of ground to cover in one semester, which means students will not …

Packaging Inductor With Self Resonance Using EDS

What is self resonance? Have you ever wonder why a lumped prototype performance does not match to the simulated one at certain frequencies? This is due to the effect of the parasitic capacitance/inductance resonating with the ideal inductance/capacitance in a lumped element package. Take an inductor for example, at its resonant frequency, the inductor will …

Touchstone Viewer

What is a Touchstone?Originally a file format type of a circuit simulator by EEsof, the touchstone file format had since become a universal file type used for the documenting of the behavior and response of the network parameter (a.k.a. S-Parameters) of a device. It is also sometimes called SnP files which is derived from its …