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.
We can use this circuit to connect low impedance microphones and even small speakers used as a...
This alarm circuit is from a 1987 publication, however the components used are still modern. The...
In the figure we have the way to implement a comparator for voltages of opposite polarities. The...