Based on the BA1404 integrated circuit, this circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit is short range, but a power amplifier stage can be used.
An interesting application that can be implemented with the LM139 is the pulse width modulator. This is...
This circuit converts a positive voltage to negative, with maximum output current of the order of...
This amplifier is suggested by Sanyo and can excite loads of 4 ohms with a power of 4.5 Wrms. The...