This circuit was obtained from Linear Technology documentation from the 80's. Powered by 5 V it can be used as a shield. The components are from the era.
This circuit for analog video signals was found in a Linear Technology integrated circuit manual. The...
This tuned circuit was found in a 1966 Electronic Circuit Handbook. The transistor can be any...
This Siliconix circuit was found in a 1980s documentation. The coil consists of 18 turns of 22...