The circuit is from 1994 National Semiconductor documentation. The component is not easy to obtain, but there are equivalents that can be searched.
Found in Motorola documentation from the 1970s, this circuit makes use of period components. The lamp is...
January 2017 - Texas Instruments' new 16-Bit SAR (Analog to Digital Converter) DC is available from...
This VCO with a common operational amplifier was found in an old American documentation. The...