This circuit uses an unusual operational amplifier nowadays and has a very low consumption. The number in parentheses corresponds to the second channel, for a stereo version.
This excellent 3-transistors audio preamplifier is suitable for use with low impedance...
This circuit was found in Motorola documentation from the 1980s. PUTs are not common components...
This type of circuit appears in several versions and approaches on this website. This was found in a...