Elektor published a matchbox radio project that pushed the limits of miniaturization. It was a compact, fully functional AM radio.

This paper introduces the simulation of the MOSFET common-source amplifier circuit, and provides a method to jointly solve the physical model of the device and the external circuit to simulate the ...

In a reciprocal system, all the wave travels in the same way backward as forward. When the exchange between the source and detectors result in different transmittance, non-Hermiticity is granted but ...

With signature FiiO power, innovative engineering and sleek aesthetic sensibility, the K15 is a full-system desktop DAC/amp ...

Whether you want a desktop DAC and Headphone Amplifier for listening to music or modernising a hi-fi system, the new Topping DX5 II is now shipping.