Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-01-16
2007-01-16
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
C323S315000, C323S907000
Reexamination Certificate
active
10801219
ABSTRACT:
An apparatus and method for producing an output reference voltage is provided. A voltage divider is configured to provide the output reference voltage from a bandgap reference voltage. The bandgap reference voltage is applied across a biased portion of the voltage divider. Additionally, a second-order temperature coefficient (TC) of the impedance of a controllable portion of the voltage divider is adjusted in response to a second-order trim signal. The first and zeroth order TCs of the controllable portion of the voltage divider are substantially independent of the second-order trim signal. In one embodiment, the controllable portion includes a resistor digital-to-analog converter (DAC) that is responsive to the second-order trim signal. The resistor DAC includes at least two different types of resistors. The second-order TCs of the two different types of resistors are substantially different.
REFERENCES:
patent: 4443753 (1984-04-01), McGlinchey
patent: 4808908 (1989-02-01), Lewis et al.
patent: 6075354 (2000-06-01), Smith et al.
patent: 6262592 (2001-07-01), Kim
patent: 6342781 (2002-01-01), Laraia
patent: 6556155 (2003-04-01), Wiles, Jr.
patent: 6838864 (2005-01-01), Di Iorio
patent: 7012417 (2006-03-01), McClure
patent: 2004/0257150 (2004-12-01), Farooqui
Audy, Jonathan M. 3rdorder curvature corrected Bandgap Cell. IEEE, 1996, 397-400, no month.
Azarkan, Ahmidou, Arie Van Staveren and Fabiano Fruett. A Low-noise Bandgap Reference Voltage Source with Curvature Correction. IEEE, 2002, 205-208, no month.
Gunawan, Made et al. A Curvature-Corrected Low-Voltage Bandgap Reference. IEEE, 1993, 667670, no month.
Gupta, Sandhya and William Black. A 3 to 5V CMOS Bandgap Voltage Reference with Novel Trimming. IEEE, 1997, 969-972, no month.
Leung, Ka Nang, Philip K.T. Mok and Chi Yat Leung. A 2-V 23-μA 5.3-ppm/° C 4thOrder Curvature-Compensated CMOS Bandgap Reference. IEEE Custom Integrated Circuits Conference, 2002, 457-460, no month.
Michejda, John and Suk K. Kim. A Precision CMOS Bandgap Reference. IEEE Journal of Solid-State Circuits, Dec. 1984, vol. Sc 19:6: 1014-1021.
Megaw David James
Ranucci Paul
Darby & Darby P.C.
Gaffney Matthew M.
Han Jessica
National Semiconductor Corporation
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