This amplifier with the LM1098 and LM101 by Motorola from a 1990 manual can be designed with more modern operations. The bandpass for small signals is 3.5 MHz and the power range is 250 kHz.
This low hysteresis circuit was obtained from old documentation. The circuit must be powered by a...
This National Semiconductor circuit uses integrated circuits that are uncommon today. The circuit...
Old phones with dials can be used in a simple home intercom system, as this circuit from Popular...