Superconductivity is an advantageous property observed in some materials, which entails an electrical resistance of zero at ...

The circuit is simple enough: it uses a capacitor, a resistor, and a pair of diodes (one of them a zener diode). He uses this basic circuit to drive simple regulators with input and output filter ...

protecting circuits from electrostatic discharge (ESD), lightning, and other transient voltage events. Varactor Diodes, or varicap diodes, are used primarily in electronic tuning circuits. Their ...

A selective input circuit improves antenna matching and immunity to interference from other strong signals. The preselector described here allows the use of up to four filters, tuned under software ...

However, the insertion loss was large compared with calculated one because the Q factor of the Si diode varicap was as low as 1 at 1.8 GHz ... GaAs varicaps instead of the Si varicaps on a printed ...

In both the circuits described the r.f. oscillator is an astable multivibrator with a 1 0. 7 MHz ceramic filter in the coupling to determine the frequency of oscillation. Frequency modulation is ...