Quantizing circuits with variable parameters

US007538702B2

(12) Ulllted States Patent

(10) Patent N0.:

Baker (54)

(75)

(45) Date of Patent:

May 26, 2009

QUANTIZING CIRCUITS WITH VARIABLE

6,813,208 B2

11/2004 Baker

PARAMETERS

6,822,892 B2

11/2004 Baker

6,826,102 B2

11/2004 Bak

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12/2004 Baker

Inventor:

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R. Jacob Baker, Bo1se, ID (US)

(73) Assignee: Micron Technology, Inc., Boise, ID (US)

(*)

US 7,538,702 B2

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Not1ce:

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Subject to any d1scla1mer, the term of this patent is extended or adjusted under 35

6,847,234 B2

1/2005 Choi

6,850,441 B2

2/2005 Mokhlesi et a1.

6,856,564

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B2

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er 3/2005 Baker

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(21) APP1- NO-I 11/820a011

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6,954,390 B2

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10/2005

Filed

Jun 15 2007

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Prior Publication Data

US 2008/0309530A1 (51)

6,985,375 B2

Dec. 18, 2008

Int. Cl.

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H03M 1/00

(2006.01)

(Commued)

(52)

US. Cl. ...................... .. 341/142; 341/143; 341/155

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Field of Classi?cation Search ............... ..

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References Cited 2/1997 Ginetti 3/1997 Wilson et a1.

5,659,315 A *

8/1997

A A B1 B1 B2 B1 B2 B2 B2 B1 B2 B2 B1 B2

9/1999 3/2000 2/2001 8/2001 12/2002 1/2003 5/2003 12/2003 12/2003 5/2004 8/2004 8/2004 9/2004 9/2004

_

Rane Corporatlon, RaneNote 137, “Digital Charma ofAudio A/D Converters: 1997’ 12 pgs'

(COnIinued) Primary ExamineriJean B J eanglaude

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OTHER PUBLICATIONS

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Baker

V2006 Baker

(74) Attorney, A gent, 0r FirmiFletcher Yoder

Mandl ...................... .. 341/143

Baker Cernea et a1. Matsumoto et a1. Cernea et a1. Cernea et a1. Baker Baker Cernea et a1. Shlimak et a1. Cernea Perner et a1. Baker Baker Baker

(57)

ABSTRACT

Systems, methods, and devices, such as a device including a

?oating-gate transistor, a quantiZing circuit coupled to the ?oating-gate transistor, and a controller con?gured to vary a

voltage of a gate of the ?oating-gate transistor When reading data from the ?oating-gate transistor. The ?oating-gate tran sistor, the quantiZing circuit, and the controller device may form a memory device that may utiliZe the quantiZing circuit to retrieve data stored via variable reference signals.

27 Claims, 21 Drawing Sheets

ELECTRONIC DEVICE

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US 7,538,702 B2 Page 2 US. PATENT DOCUMENTS 7,002,833 B2 7,009,901 B2

2/2006 Hush et al. 3/2006 Baker

7,061,324 B2*

6/2006

7,095,667 7,102,932 7,133,307 2002/0101758 2002/0194557 2003/0039162 2003/0043616 2003/0067797

B2 B2 B2 A1 A1 A1 A1 A1

2003/0198078 2003/0214868 2004/0008555 2004/0032760 2004/0062100 2004/0076052 2004/0095839 2004/0190327 2004/0190334 2004/0199710 2004/0240294 2005/0002249 2005/0007803 2005/0007850 2005/0013184 2005/0018477 2005/0018512 2005/0041128 2005/0088892 2005/0088893 2005/0201145 2006/0013040 2006/0062062 2006/0227641 2006/0250853

A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1 A1

8/2006 9/2006 11/2006 8/2002 12/2002 2/2003 3/2003 4/2003 10/2003 11/2003 1/2004 2/2004 4/2004 4/2004 5/2004 9/2004 9/2004 10/2004 12/2004 1/2005 1/2005 1/2005 1/2005 1/2005 1/2005 2/2005 4/2005 4/2005 9/2005 1/2006 3/2006 10/2006 11/2006

Diorio et a1. .............. .. 330/277

Baker Baker Baker Baker Park Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Baker Taylor et al.

Baker, “CMOS Mixed Signal Circuit Design,” IEEE Press, A. John

Wiley & Sons, Inc.; Copyright 2003, Figures 30.63, 31.82, 32.6, 32.7, 32.24, 32.51, 33.34, 33.47, 33.51, 34.18, 34.24; located at http:// cmosedu.com/cmos2/book2.htrn.

Dallas Semiconductor, Maxim Application Note 1870, “Demystify ing Sigma-Delta ADCs,” (Jan. 31, 2003), 15 pgs. Baker, R.J., (2003) Mixed-Signal Design in the Microelectronics Curriculum, IEEE University/Government/Industry Microelectron ics (UGIM) Symposium, Jun. 30-Jul. 2, 2003. Baker, R]. (2004) Delta-Sigma Modulation for Sensing, IEEE/EDS Workshop on Microelectronics and Electron Devices (WMED), Apr. 2004.

Baker, “CMOS Circuit Design, Layout, and Simulation,” Second Edition, IEEE Press, A. John Wiley & Sons, Inc.; Copyright 2005; Chapters 13, 16, 17, 20, 22-24, 28-29; pp. 375-396, 433-522, 613 656, 711-828, 931-1022. Hadrick, M. and Baker, R.J., (2005) Sensing in CMOSImagers using Delta-Sigma Modulation, a general presentation of our Work in this area.

Baker, R]. (2005) Design of High-Speed CMOS Op-Amps for Sig nal Processing, IEEE/EDS Workshop on Microelectronics and Elec tron Devices (WMED), Apr. 2005.

Leslie, M.B., and Baker, R.J., (2006) “Noise-Shaping Sense Ampli ?er for MRAM Cross-Point Arrays,” IEEE Journal of Solid State Circuits, vol. 41, No. 3, pp. 699-704.

Duvvada, K., Saxena, V., and Baker, R. J ., (2006) High Speed Digital Input Bu?er Circuits, proceedings of the IEEE/EDS Workshop on Microelectronics and Electron Devices (WMED), pp. 11-12, Apr. 2006.

Saxena, V., Plum, T.J., Jessing, J.R., and Baker, R. J., (2006) Design and Fabrication of a MEMS Capacitive Chemical Sensor System, proceedings of the IEEE/EDS Workshop on Microelectronics and Electron Devices (WMED), pp. 17-18, Apr. 2006.

Baker, R]. and Saxena, V., (2007) Design ofBandpass Delta Sigma Modulators.‘ Avoiding Common Mistakes, presented at various uni versities and companies. Wikipedia4de?nition of “Error detection and correction”, pulled from Website Jun. 1, 2007, 9 pgs.

Wikipedia4de?nition of “Hamming code”, pulled from Website Jun. 1, 2007, 8 pgs.

Wikipedia4de?nition of “Linear feedback shift register (LFSR),” OTHER PUBLICATIONS

pulled from Website Jun. 1, 2007, 4 pgs.

Park, “Motorola Digital Signal ProcessorsiPrinciples of Sigma

Baker, R.J., (2001-2006) Sensing Circuits for Resistive Memory,

Delta Modulation forAnalog-to-Digital Converters,” (Undated).

presented at various universities and companies.

* cited by examiner

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