This very low frequency circuit was found in a 1964 Electronic Design. Transistors may be modern equivalents. The filter is low pass type.
This simulation shows how to test an IGBTs using a signal source and the virtual oscilloscope of...
This is an RF amplification step for small signals using the common base configuration. The...
This low-pass filter with 741 op and symmetrical source was found in the August 1993 issue of...