This 1 to 40 MHz amplifier is from a 1969 Motorola documentation. The components are of the time but admit modern equivalents.
Maxim MAX16813B 4 Channel LED Driver These Maxim Integrated LED drivers are available from Mouser...
This circuit was found in a 1968s American. Transistors are of general purpose and the input is a...
This circuit, from a documentation from the 1970s, produces two sinusoidal signals given by C2 and...