This circuit is from Motorola's Linear Databook from 1990. The integrated circuit and transistors are uncommon, but the circuit can be assembled with equivalents.
This circuit is indicated for measurement bridges as a null detector, thanks to the logarithmic gain...
This circuit produces a IR beam with a frequency adjusted by the 100k pot. The circuit can be used in...
This small audio amplifier circuit in complementary symmetry was found in the 1974 Mullard...