In addition to their actual operation parameter transconductance, active electronic key components such as vacuum tubes, field effect transistors, and bipolar transistors demonstrate diverse negative parameters. In applying the socalled Diamond structure, the user can obtain an improved current source with reduced disturbance parameters, as well as a programmable transconductance independent of temperature. Standard applications for the Diamond current source (DCS) can be found in buffers, operational amplifiers with voltage or current feedback, and transconductance amplifiers. The DCS simplifies the design of electronic circuits with bandwidths of up to 400MHz and slew rates of 3000V/ms with a low supply current of several mA.