2019-11-01 - Tim Green

Who’s afraid of the big bad capacitor load? Little red chopper-stabilized amp?

Capacitive loads can make chopper-stabilized op amps unstable.

2019-10-31 - John Dunn

Misplaced insulator proves fatal

The insulator on a guy wire supporting a pole was placed above the lowest 12-kV line, leading to a catastrophic power line accident.

2019-10-14 - John Dunn

Can lensing damage photocell arrays?

Is it possible for photoelectric device point location damage to be caused by unintended sunlight focusing?

2019-10-07 - John Dunn

Zero offset active lowpass filter, part 3

The third configuration of a zero offset active lowpass filter has near-Chebyshev roll-off properties.

2019-09-30 - Bob Witte

For signal distortion, phase matters

See the relationship between time shifting and phase shifting.

2019-09-25 - Istvan Novak

Bypass capacitor S-parameter models: What you need to know

Whether you think in the time domain or frequency domain, learn how to interpret capacitor manufacturer S-parameter models and how to apply them to your simulations.

2019-09-17 - John Dunn

Secondary x-ray fluorescence

Secondary x-ray fluorescence is an effect where a material sample is illuminated by an incoming x-ray source in response to which the sample's constituents emit responsive x-rays of their own.

2019-09-09 - Hugo Coolens

How much noise does your resistor really produce?

When one time constant is at least 10 times smaller than the other, we will make an error smaller than 5 percent by neglecting the smaller time constant.

2019-08-20 - John Dunn

Shock hazard: filtering on input power lines

Compliance with EMI requirements usually involves the use of filtering on input power lines, which can pose dangerous issues.

2019-08-14 - Dana Geiger

Some thoughts on Class B amplifiers

Learn about efficiency and selecting a heat sink for Class B amplifiers.