In Seemingly Simple Circuits: Transresistance Amplifier, Part 1– Approximating Op-Amps, the op-amp was approximated from a single-pole, finite gain amplifier to an infinite-gain, single-pole op-amp, ...

The circuit in Figure 1 is suited for inductive sources such as a dynamic microphone, transformer or inductance sensor/pick up. Figure 1 A simple amplifier circuit suited for inductive sources such as ...

Hearing aids are probably more high-tech than you think. They are tiny. They have to go through a lot of trouble to prevent feedback. They need a long battery life. The good ones match their ...

In a balanced op-amp circuit, the op-amp inputs see equal impedances looking into the circuit. Balanced circuits provide better performance by cancelling some input errors and have a simple R F /R I ...

If you cultivate an interest in building radios it’s likely that you’ll at some point make a simple receiver. Perhaps a ...

The Scandinavian hi-fi company Hegel has been around for over 30 years and is best known for making high-end yet bespoke audio components for serious audiophiles. Its latest integrated amplifier, the ...

Commercial curve tracers have existed for decades. But designers without access to one can create a simple circuit that uses a function generator and oscilloscope to generate JFET transfer and ...

I've noticed that my 2 year old daughter has an unhealthy interest in my current, old Denon amplifier from the beforetime that has lots of buttons and lights. I've also noticed that my audio input ...

I'm looking for a simple A/V receiver/amplifier. All I want is HDMI 1.3/1.4 multichannel audio support. And smallness. My setup uses an external video scaler/HDMI switch, so all I need the amplifier ...