This circuit was found in General Electric documentation from 1965. The transistors are from that time. The diodes consist of a component that contained them.
This is the basic operational amplifier configuration for gain 10. R2 can be changed to other...
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
This circuit was obtained from a Linear Technology manual from the 1990s. The sensor is of the...