Modern SIM cards allow applications to be loaded when the SIM is in use by the subscriber. These applications communicate with the handset or a server using SIM application toolkit, which was initially specified by 3GPP in TS 11.14 (there is an identical ETSI specification with different numbering).
(Redirected from Voltage follower) A buffer amplifier (sometimes simply called a buffer) is one that provides electrical impedance transformation from one circuit to another. Two main types of buffer exist: the voltage buffer and the current buffer.
A voltage regulator does, just what it's name implies, it regulates the output voltage of the generator. It does this using a very small portion of the generators output, and converting that AC voltage into a DC current that is inversely proportional to the generators output voltage (once it reaches full voltage).