0 to 200 nA Current Meter (CB5281E)

This circuit was obtained from a 2005 Linear Technology manual. It is based on company components and is powered by two 1.5V batteries.

10 Gain Amplifier LM3900 (CB5042E)
In the figure we have the circuit of an amplifier for alternating signals with 10 times gain,...
Low Pass Filter with 741 (CB1454E)
We found this circuit in a documentation on active filters from 1977. The gain of this circuit is...
One-Component Oscillator (CB112)
Figure bellow shows a ring oscillator using five inverters of a 4049. [The circuit operates only...