This traditional crystal oscillator configuration can use any CMOS gate configured as an inverter. R1 has values from 1 to 5 M ohm and R values around 10 k.
The 1: 1 transformer on this circuit found in a 1967 Electronics World can be wrapped around a...
This simple stage can operate with low frequency signals (audio), driving a small lodspeaker....
This circuit has a gain of 6 and a Q factor of 8.63. Operational amplifiers are common, like the...