The circuit is from a Radio Electronics magazine from October 1987. The Triac must be equipped with a heatsink and the transistors are general purpose.
We can implement this filter with more modern equivalent operational amplifiers, since the LM110 is...
We found this circuit in a 2005 documentation. The circuit allows the automation of a gate through...
The amplifier presented with the TDA2003 can provide a power of up to 10 W (rms) in a load of 2...