The figure shows how to couple two CMOS circuits using an optical coupler to achieve isolation. The circuit is from a Radio Electronics from August 1992.
This circuit was suggested by General Electric in 1970 documentation. It makes use of a photo-SCR...
E) This audio filter was found in the August 1993 issue of Radio Electronics magazine. It cuts low...
Suggested by Motorola documentation from the 1980s, this circuit makes use of MOSFETs of the time....