Articles

Modern day recording and broadcast is a mixed bag for today's audio engineers when it comes to input signal chains. Microphone electronic technology really hasn't changed that much over the last 50 years. The concept is mostly based around ...

The biggest problem with precision noise measurement is that the noise floor you’re trying to evaluate is frequently below the sensitivity of your measuring instruments. The dominant technique for gaging precision op-amp noise is to calculate ...

Dr. Goodenough received a Nobel Prize at the age of 97 for his contributions to making the Lithium-ion battery a reality. Figure 1. Dr. John B. Goodenough with a Li-ion battery. In 2019, at the age of 97, Dr. John B. Goodenough became the oldest ...

The concept of using supercapacitors (also known as ultracapacitors, supercaps, etc.), and replacing the batteries in portable micropower applications ( Ref. 1 ) is gaining momentum. In fact, it has become one of the more noticeable technical ...

Sensors such as strain gages, RTDs (resistance temperature detectors), and thermistors produce a resistance that’s proportional to force or temperature. If you measure a sensor’s resistance, you can calculate the physical parameter. ...

From the early CRT-based tools to the latest multifunctional powerhouses, the venerable oscilloscope has long been a mainstay of electronic design. Able to graphically display a range of electronic circuit performance information as a ...

An unshielded twisted-pair cable that is transformer-coupled to a digital system can easily act as a radiating antenna, not because of the differential analog signal the cable carries, but because of common-mode currents induced by unwanted stray ...

Cortex-M0+ is not the newest small, low-power processor and, in fact, some newer offerings may surpass it. However, its broad deployment and mature environment continue to make the processor a compelling offering for low-power applications. So, ...

If you need a very pure sine wave in the audio range, the circuit in Figure 1 can help. It is a simple deal: A sine wave with a THD of 1% coming from a function generator that goes through a trackable low-pass filter, which attenuates the ...

When current pulses with a stable I HIGH /I LOW ratio modulate a semiconductor junction, the ensuing voltage difference (for example, ΔV BE for a bipolar transistor) is a linear function of the absolute (Kelvin) temperature, T. You can use ...