Chopper stabilized bandgap reference circuit and methodology...

Details Chopper stabilized bandgap reference circuit and methodology... Chopper stabilized bandgap reference circuit and methodology...

2011-08-23

2011-08-23

Vu, Bao Q (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S313000, C323S315000, C323S907000, C327S539000

Reexamination Certificate

active

08004266

ABSTRACT:
A chopper stabilized bandgap voltage reference circuit comprises current mirror circuitry mirroring first and second currents into first and second networks to generate a forward diode voltage signal and a PTAT (proportional to absolute temperature) component signal, and a third current having a derived temperature coefficient into a third network to generate a reference voltage signal for a regulator. An amplifier amplifies a differential signal of the forward diode voltage signal and the PTAT component signal to output a fourth current to control the first and second currents. According to a chopper clock, a modulator modulates the differential signal to be supplied to the amplifier and a demodulator demodulates the fourth current. A gain loop compensation circuit is coupled to the demodulator to compensate the amplifier, and filter the fourth current for noise components, and a bypass circuit is also provided to the third network for filtering the third current.

REFERENCES:
patent: 4392112 (1983-07-01), Schade, Jr.
patent: 5138543 (1992-08-01), Harm et al.
patent: 5325045 (1994-06-01), Sundby
patent: 5410270 (1995-04-01), Rybicki et al.
patent: 5477481 (1995-12-01), Kerth
patent: 5933045 (1999-08-01), Audy et al.
patent: 6016051 (2000-01-01), Can
patent: 6052020 (2000-04-01), Doyle
patent: 6064257 (2000-05-01), Sauer
patent: 6075407 (2000-06-01), Doyle
patent: 6130578 (2000-10-01), Tang
patent: 6462612 (2002-10-01), Roh et al.
patent: 6664847 (2003-12-01), Ye
patent: 6828847 (2004-12-01), Marinca
patent: 6891358 (2005-05-01), Marinca
patent: 7253597 (2007-08-01), Brokaw
patent: 7304466 (2007-12-01), Kimura
patent: 7400128 (2008-07-01), Richardson
patent: 7411380 (2008-08-01), Chang et al.
patent: 7482798 (2009-01-01), Han
patent: 7750726 (2010-07-01), Fujisawa et al.
patent: 2007/0052473 (2007-03-01), McLeod
patent: 2009/0002048 (2009-01-01), Fujisawa et al.
patent: 2009/0315532 (2009-12-01), Negoi et al.
European Search Report issued in European Patent Application No. 10005284.4-1239, mailed Apr. 12, 2011.
A. Pierazzi., et al., “Band-Gap References for near 1-V operation in standard CMOS technology”, IEEE Custom Integrated Circuit Conference, 2001, pp. 463-466.
C. C. Enz., etal., “A CMOS Chopper Amplifier”, IEEE Journal of Solid-State Circuits, vol. SC-22 No. 3, pp. 335-342, Jun. 1987, IEEE.
C. C. Enz., et al., “Circuit Techniques for Reducing the Effects of Op-Amp Imperfections: Autozeroing, Correlated Double Sampling, and Chopper Stabilization”, Proceedings of the IEEE, vol. 84, No. 11, Nov. 1996, pp. 1584-1614, IEEE.
M.A.T. Sanduleanu., et al., “A Low Noise, Low Residual Offset, Chopped Amplifier for Mixed Level Applications”, 1998, pp. 333-336, IEEE.

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