Low voltage CMOS bandgap reference

Details Low voltage CMOS bandgap reference Low voltage CMOS bandgap reference

2005-09-13

2005-09-13

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

Reexamination Certificate

active

06943617

ABSTRACT:
A bandgap reference generator comprises a PMOS transistor and NMOS transistor in a pnp bipolar junction transistor connected in series in a first leg. The bandgap reference generator includes a second leg that includes a PMOS transistor, an NMOS transistor, a resistor and a pnp bipolar junction transistor. A bias circuit provides a bias to a mirror formed by the gates of the PMOS transistors to lower the operating voltage of the bandgap reference generator. A second biasing circuit may provide bias to the mirror formed of the NMOS transistors. A time-based and a DC bias-based start up circuitry and method is provided.

REFERENCES:
patent: 4593208 (1986-06-01), Single
patent: 6150872 (2000-11-01), McNeill et al.
patent: 6507179 (2003-01-01), Jun et al.
patent: 6529066 (2003-03-01), Guenot et al.

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