Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-03-04
1998-06-02
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327513, 327542, 323314, G05F 316, G05F 322
Patent
active
057606390
ABSTRACT:
A voltage and current reference circuit (11) having a low temperature coefficient is provided. The voltage and current reference circuit (11) minimizes component count to reduce area on an integrated circuit die. A bandgap voltage reference (12) produces a low temperature coefficient voltage. A voltage follower (13) is coupled to the bandgap voltage reference (12) that produces a reference voltage corresponding to a bandgap voltage. A temperature variant current from the bandgap voltage reference (12) is mirrored and provided to a first electrode of the voltage follower (13). A resistor (R4) is coupled between a power supply terminal and a second electrode of the voltage follower (13). The resistance of the resistor (R4) is selected to generate a current that cancels temperature dependencies of the temperature variant current. A current mirror circuit (14) receives a remaining portion of the temperature variant current and outputs a low temperature coefficient current.
REFERENCES:
patent: 4349778 (1982-09-01), Davis
patent: 4443753 (1984-04-01), McGlinchey
patent: 4626770 (1986-12-01), Price, Jr.
patent: 4786856 (1988-11-01), Metcalf et al.
patent: 4816742 (1989-03-01), Van De Plassche
patent: 4939442 (1990-07-01), Carvajal et al.
patent: 5001362 (1991-03-01), Tran
patent: 5124632 (1992-06-01), Greaves
patent: 5173656 (1992-12-01), Seevinck et al.
patent: 5208527 (1993-05-01), Poletto et al.
patent: 5293112 (1994-03-01), Takahashi
patent: 5304918 (1994-04-01), Khieu
patent: 5307007 (1994-04-01), Wu et al.
patent: 5339020 (1994-08-01), Siligoni et al.
patent: 5391980 (1995-02-01), Thiel et al.
patent: 5453679 (1995-09-01), Rapp
patent: 5455504 (1995-10-01), Suzuki et al.
patent: 5497073 (1996-03-01), Bohme et al.
patent: 5557194 (1996-09-01), Kato
patent: 5570008 (1996-10-01), Goetz
Paul Gray et al., "Analysis and Design of Analog Integrated Circuits," John Wiley & Sons, 1984 (2nd Edition), pp. 289-296.
Callahan Timothy P.
Coleman Sharon K.
Englund Terry L.
Hoshizaki Gary W.
Motorola Inc.
LandOfFree
Voltage and current reference circuit with a low temperature coe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voltage and current reference circuit with a low temperature coe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage and current reference circuit with a low temperature coe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1464759