BANDGAP GENERATOR PROVIDING LOW-VOLTAGE OPERATION

摘要

A bandgap reference circuit (Fig. 4) uses a pair of parallel loads (438 and 439) and an op-amp driver circuit (411). The op-amp driver circuit uses NMOS inputs (N_NEG N_POS) to sense voltage conditions at the loads. The configuration permits low-voltage response at low temperatures as a result of the configuration setting operating voltages above a saturation voltage. The op-amp driver provides an NMOS output (431), and a low-gain stage (446) converts the NMOS output to an output corresponding to that of a conventional PMOS design (Vout).