Alfred Rosenkränzer (49)

17-09-2025 | Connecting peripherals like USB sticks to a PC is usually straightforward since they share the same ground potential. However, USB-connected...

1-08-2025 | At the end of 2024, my opamp tester for audio applications [1] was published. It enables evaluation of various opamps under identical condit...

1-07-2025 | Last year, we published a high-quality, variable-frequency audio notch filter. To complete a typical test lab setup for measuring audio equi...

8-06-2025 | When peripherals connected to a PC don't function or behave erratically, a thorough fault analysis of the USB port often proves revealing. T...

27-04-2025 | A defective parking sensor can be expensive if you don’t notice it in time and get it repaired. Following the engineer’s ironclad rule “Do i...

10-03-2025 | Back in 2024, we introduced a high-quality variable-frequency audio notch filter. Now, we present a high-performance audio frequency generat...

1-03-2025 | In most cases, connecting peripherals to a PC is not a problem. The fact that a USB stick, for example, has the same ground potential as a l...

1-11-2024 | The available range of operational amplifiers is extremely diverse. Usually, the initial selection for a specific purpose is based on techni...

15-10-2024 | The available range of opamps is vast. After selecting based on technical specs, further testing may be needed. Try this do-it-yourself opam...

1-09-2024 | When measuring distortion in audio devices, it makes sense to filter out the controlling sinusoidal signal before the spectrum analyzer. Thi...