Despite being from a 1969 publication, the transistors used have current equivalents such as BC548 and BC558. The circuit generates signals from 1 500 to 20 000 Hz and 4 scales.
This circuit, in addition to transforming a sinusoidal signal into a square, shifts its phase. The...
This transmitter, found in Raytheon documentation from 1957, has a range of a few meters. L1 can...
This circuit uses operational amplifiers that must be powered by a symmetrical source to implement a...