This circuit was found in Siliconix documentation from the 1980s. Equivalent operational amplifiers can be used and the output current is very low.
This circuit is from a 1965 General Electric publication. It uses a thermistor to fire a reed...
This high speed laser diode driver was found in a 1980s documentation. Power FETs can be replaced...
This circuit was obtained from a 1994 publication. Its purpose is to digitally switch 5 audio...