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 varistor is able to short these surges and spikes and keep them away from the following application. A varistor is also known as Voltage Dependent Resistor or VDR. A power surge or a spike is an increase in voltage significantly above the standard voltage of 230 volts.