This circuit was found in Texas Instruments documentation from 1968. The transistors are from that time, admitting modern equivalents. The response ranges is from 20 to 20 000 Hz.
Obtaining a voltage that is proportional to a current drained by a load can be important in...
The filter shown in the figure, suggested by National Semiconductor, only allows frequencies above...
This circuit allows you to find two diodes with equal characteristics. The circuit was found in a...