Found in an old Xicor documentation, this circuit makes use of an X9241, which contains four digitally controlled analog potentiometers.
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....
This circuit has a common configuration widely used in projects on this site. The transistor is...
This circuit appears elsewhere in this section and on this site. The circuit generates a linear...