Latest Amplifiers Articles and Videos

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.

An inside look at how the 741 operational amplifier operates with LTspice simulation. We'll go over internal structure…

An inside look at how the 741 operational amplifier operates with LTspice simulation. We'll go over internal structure and differential amplifiers and continue with everything you've ever needed to know about this operational amplifier.

Use negative feedback to increase your amplifier’s signal-to-noise ratio, reduce its nonlinear distortion, and improve…

Use negative feedback to increase your amplifier’s signal-to-noise ratio, reduce its nonlinear distortion, and improve its input- and output-impedance characteristics.

An overview of how the concepts of electron flow and the role of individual circuit components can be related to the flow…

An overview of how the concepts of electron flow and the role of individual circuit components can be related to the flow of fluid in pipe networks. The analogy between hydraulics and electricity is a useful tool for teaching and for those who are struggling to understand how circuits work.

Having introduced the general negative feedback structure, we will now demonstrate that negative feedback has a…

Having introduced the general negative feedback structure, we will now demonstrate that negative feedback has a beneficial effect on two important characteristics of amplifier circuits.

This article, the first in a series, will introduce you to the fundamental concepts required for understanding and…

This article, the first in a series, will introduce you to the fundamental concepts required for understanding and analyzing negative feedback amplifiers.

This analog design allows your LEDs to respond to your music. Just plug your music source into this which sends a channel…

This analog design allows your LEDs to respond to your music. Just plug your music source into this which sends a channel to your sound system and some LEDs.

Use a laser and a photo resistor to build a laser based point-to-point communication system. The best part? It's under $10.

Use a laser and a photo resistor to build a laser based point-to-point communication system. The best part? It's under $10.

Is IDT’s Tx/Rx wireless power solution suitable for applications that require high-precision analog performance?

Is IDT’s Tx/Rx wireless power solution suitable for applications that require high-precision analog performance?

This article reviews the basics of finding Thevenin and Norton equivalents and discusses how to apply Thevenin's theorem…

This article reviews the basics of finding Thevenin and Norton equivalents and discusses how to apply Thevenin's theorem to a practical circuit.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

All of our previous circuits dealt with opamps using resistors in the feedback loop. What happens when we start swapping…

All of our previous circuits dealt with opamps using resistors in the feedback loop. What happens when we start swapping out resistors for other passive components?

Basic refresher on instrumentation amplifiers, followed by a several real world applications in which an engineer would…

Basic refresher on instrumentation amplifiers, followed by a several real world applications in which an engineer would find this circuit.