Band gap reference using a low voltage power supply

Details Band gap reference using a low voltage power supply Band gap reference using a low voltage power supply

1999-03-26

2000-02-29

Berhane, Adolf Deneke

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323316, G05F 316

Patent

active

06031365&

ABSTRACT:
A band gap reference includes an operational amplifier with an output (n23) driving the gate of three current source transistors (501-503). The first current source (501) drives the (+) opamp input (n20) and a transistor (511) functioning as a diode. The second current source (502) drives the (-) opamp input and a series resistor (R.sub.1) and a transistor (512) functioning as a diode. The third current source (503) drives a series resistor (R.sub.2) and diode connected transistor (513). The opamp includes first series transistors (521) and (524) connected between V.sub.DD and V.sub.SS, and second series transistors (522) and (525) connected between V.sub.DD and V.sub.SS. With only two series transistors between V.sub.DD and V.sub.SS at any point, only two times a CMOS transistor threshold drop (less than 1.8 volts) will occur enabling V.sub.DD to range from 1.8-3.6 volts without altering the band gap reference output voltage (V.sub.DIODE). Further, CMOS transistors in the circuit may operate with a 2.7 volt maximum gate to source, or gate to drain voltage.

REFERENCES:
patent: 4897595 (1990-01-01), Holle
patent: 5229710 (1993-07-01), Kraus et al.
patent: 5229711 (1993-07-01), Inoue
patent: 5313114 (1994-05-01), Poletto et al.
patent: 5352972 (1994-10-01), Pernici et al.
patent: 5568045 (1996-10-01), Koazechi
patent: 5789906 (1998-08-01), Mizuide
patent: 5867012 (1999-02-01), Tuthill
patent: 5936392 (1999-08-01), Taylor

Affiliated with

Also associated with

Rating

Band gap reference using a low voltage power supply does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Band gap reference using a low voltage power supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Band gap reference using a low voltage power supply will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-686247