This dual-gate FET RF signal mixer circuit was found in a 1980s documentation. The circuit is intended for applications in superheterodyne receivers of the time.
This circuit is from a 1976 publication. The circuit formed by L1 and C1 must be designed...
This interesting circuit found in an Elektor from the 90s controls loads in four quadrants of the driving...
This third-order Butterworth filter was found in American documentation from the 1980s. Formulas for...