Latest Amplifiers Technical Articles

Classifying signals is a way to organize the signals that surround us. It focuses design, testing requirements,…

Classifying signals is a way to organize the signals that surround us. It focuses design, testing requirements, measurement tools, and expected results. There are many ways to classify signals!

In this article we’ll use the SAM4S Xplained Pro development platform to get some hands-on experience with a PWM DAC.

In this article we’ll use the SAM4S Xplained Pro development platform to get some hands-on experience with a PWM DAC.

In this article we will take a closer look at how to effectively low-pass filter a PWM signal into an analog voltage.

In this article we will take a closer look at how to effectively low-pass filter a PWM signal into an analog voltage.

If your microcontroller doesn’t have a digital-to-analog converter, you can make a passable replacement with nothing…

If your microcontroller doesn’t have a digital-to-analog converter, you can make a passable replacement with nothing more than a pulse-width-modulated signal and a low-pass filter.

If you choose to buffer with MOSFETs instead of BJTs, you need to consider the relationship between gate capacitance and…

If you choose to buffer with MOSFETs instead of BJTs, you need to consider the relationship between gate capacitance and instability.

The previous two articles focused on bipolar junction transistors. In this article, we’ll look at buffering with…

The previous two articles focused on bipolar junction transistors. In this article, we’ll look at buffering with MOSFETs instead of BJTs.

In this article, we will look at two variations on the basic BJT current-buffering circuit.

In this article, we will look at two variations on the basic BJT current-buffering circuit.

Op-amps become even more versatile if you can use them in high-current applications. In this article, we will look at a…

Op-amps become even more versatile if you can use them in high-current applications. In this article, we will look at a basic current-buffering circuit.

Invoke the power of the PID (proportional–integral–derivative controller)! The key components in this design are an…

Invoke the power of the PID (proportional–integral–derivative controller)! The key components in this design are an EFM8 microcontroller, a DAC, and the MAX31855 thermocouple-to-digital converter.

Ever wanted to find out more about Class D amplification? Here's a handy breakdown.

Ever wanted to find out more about Class D amplification? Here's a handy breakdown.

The transient response of a negative-feedback amplifier can help us to understand the nature of stability and convey…

The transient response of a negative-feedback amplifier can help us to understand the nature of stability and convey useful information about the stability characteristics of a particular circuit.

A simple “break-the-feedback-loop” simulation technique makes for convenient stability analysis, especially with…

A simple “break-the-feedback-loop” simulation technique makes for convenient stability analysis, especially with complex circuits.

The techniques discussed in previous articles can help us to understand and remedy stability problems observed in a…

The techniques discussed in previous articles can help us to understand and remedy stability problems observed in a common circuit used to amplify photodiode signals.

This article will help you to understand why the frequency response of a feedback network can seriously, and sometimes…

This article will help you to understand why the frequency response of a feedback network can seriously, and sometimes unexpectedly, degrade stability.

This article will show you a handy alternative approach to assessing stability via open-loop gain and the feedback factor.

This article will show you a handy alternative approach to assessing stability via open-loop gain and the feedback factor.

How to use frequency-domain simulations to analyze loop gain and evaluate the stability of your amplifier circuit. We…

How to use frequency-domain simulations to analyze loop gain and evaluate the stability of your amplifier circuit. We need a way to determine whether a circuit is sufficiently stable—in other words, stable enough to ensure that the circuit will perform properly despite part-to-part variations and environmental or operational conditions that affect the characteristics of the open-loop gain or the feedback network. There is where gain margin and phase margin come into play.

How an op amp works with LTspice simulation. We left off last time finishing up how the input stage of an op-amp works.…

How an op amp works with LTspice simulation. We left off last time finishing up how the input stage of an op-amp works. The next important stage is made up by transistors Q3, Q4, Q5, Q6, and Q7.

Resolution and sampling rate are two important factors to consider when selecting an analog-to-digital converter (ADC).…

Resolution and sampling rate are two important factors to consider when selecting an analog-to-digital converter (ADC). In order to understand these fully, concepts such as quantisation, and the Nyquist Criterion must be understood to a certain degree.

Why are negative-feedback amplifiers susceptible to oscillation? What is the fundamental criterion for stability? Let’s…

Why are negative-feedback amplifiers susceptible to oscillation? What is the fundamental criterion for stability? Let’s find out.