With distortion of less than 1 dB from 10 Hz to 20 kHz this circuit was found in the December 1972 issue of Radio Electronics magazine. The amplifier is a type that preceded the 741, the 709.
This 9-pixel circuit has been implemented with 9 LDRs and can be coupled to a processing system for...
This circuit was obtained in a 1979 magazine, but it can be easily assembled today, as the...
The presented circuit makes use of a common operational amplifier that must be powered by a...