constant current adapter

R. Storn constant current adapter quite often the case that the electronics en- It is source. When thusiast requires a constant current for test pur- such a need does arise, for example is not usually poses, it is a piece of equipment that available. However, it is not necessary to construct an entire constant current source for each appli- n adapter that can and a current output of around 200 mA (or greater). This supply can then be used to power the constant current adapter. The asymmetric-to-symmetric converter consisting of IC1 and transistors Ti and T2 provides effective output voltage of ± 15 V across the two capacitors C2 and C3. This symmetrical supply can be used separately provided the required output current is no greater than about 50 mA. Let us now examine the constant current adapter itself in greater detail. The asymmetric-to-symmetric voltage converter is required to power the oper- ational amplifier IC2. This opamP is used as the current source and is controlled ...