Introduction Transmission line theory has been around for more than a century. However, the distributed nature of it has kept it interesting for all these years. One interesting subject is the step response in a hybrid lumped-distributed network. While for a purely lumped network it is quite easy to analyze and derive the response equation, for a distributed or a […]
Oscillators are integral parts of many electronic devices. Majority of fundamental signal processing operations such as frequency translation, synchronization, and timing, require stable clocks derived from an electrical oscillator. An oscillator is generally susceptible to any external periodic signal whose frequency is close to the oscillation frequency or its integer harmonics. Without the loss of […]
In digital communication systems, Analog-to-Digital Converter (ADC) is the main interface between the analog domain and the digital domain. The continuous rising demand for high data rate communication systems has been creating the need for wide-band ADCs with a high sampling rate and high accuracy. These ADCs need to achieve high speed and high resolution […]
This is the second part of our "MATLAB tips and tricks" series. As we also mentioned in part 1, MATLAB is the programming language of choice for many engineers, scientists, data analysts, and more. In this post we introduce some interesting MATLAB tips and tricks. They can be used to make writing code easier and shorter, also to write codes that run faster.
The ABCD representation for a two-port circuit is very convenient for the calculation of cable transfer function. In this post we show how to compute the cable transfer function for a simple transmission line as well as a simple cable with one bridge-tap connection. The method can be extended to more complex cases very easily.
With the advances in technology, come significant advances in education. One of the greatest advancements and themes in the education world is the creation of free online schools. The free online schools are essential for democratization of education. And the amazing fact is that not only these schools are free, but they have a surprisingly high quality content.
Dual-loop clock and data recovery (CDR) systems are widely used in today’s gigabit wireline communications. Figure 1 shows the architecture of a dual-loop CDR, consisting of a phase locked loop (PLL) and CDR. The PLL creates a quadrature clock at the data rate of the input data , while the CDR tracks the data phase along each lane of the serial link. The data recovery loop is based on a phase detector (PD), a finite state machine (FSM), and a phase interpolator (PI). A bang-bang PD creates "up" and "down" signals based on the phase of the clock in respect to the input data.
In this post we explain what the gain compression means and why it is important in the design of RF systems. We also explain how to compute single-tone and two-tone 1 dB compression points.
As an Electrical Engineer, we all need great books to learn from, or use as a reference. And finding a good book, among tens and sometimes hundreds of choices is not easy. In this post we have tried to compile a list of some great Electrical Engineering books. We created the list by contacting some experts in the field, and also by reading a lot of reader's reviews.
In this blog post we explain the relationship between the signal-to-noise ratio and effective-number of bits in an ADC. We will explain that in practice the relationship is also a function of peak-to-average power ratio of the input signal.