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DYNAMIC ELEMENT MATCHING (DEM). Presented By: Raf Karakiewicz. Presentation Outline. With vs. Without DEM. Technical Aspects. Published Results. DAC (No DEM). E N C O D E R. S U M. 1-bit DAC. 1-bit DAC. 1-bit DAC. 1-bit DAC. 3. +. 1-bit DAC. X[n]. 1-bit DAC. -.

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dynamic element matching dem

DYNAMIC ELEMENT MATCHING(DEM)

Presented By:

Raf Karakiewicz

presentation outline
Presentation Outline
  • With vs. Without DEM
  • Technical Aspects
  • Published Results
dac no dem
DAC (No DEM)

E

N

C

O

D

E

R

S

U

M

1-bit

DAC

1-bit

DAC

1-bit

DAC

1-bit

DAC

3

+

1-bit

DAC

X[n]

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

dac no dem4
DAC (No DEM)

E

N

C

O

D

E

R

S

U

M

1-bit

DAC

1-bit

DAC

1-bit

DAC

1-bit

DAC

3

+

1-bit

DAC

X[n]

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

dac no dem5
DAC (No DEM)

E

N

C

O

D

E

R

S

U

M

1-bit

DAC

1-bit

DAC

1-bit

DAC

1-bit

DAC

3

+

1-bit

DAC

X[n]

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

higher resolution
Higher Resolution
  • Without DEM
    • Laser Trimming
    • Digital calibration
    • Careful layout
  • With DEM
    • Flawed-elements taken as they are
dac with dem
DAC (With DEM)

DEM Code

E

N

C

O

D

E

R

S

C

R

A

M

B

L

E

R

S

U

M

1-bit

DAC

1-bit

DAC

1-bit

DAC

1-bit

DAC

3

+

1-bit

DAC

X[n]

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

dac with dem8
DAC (With DEM)

DEM Code

E

N

C

O

D

E

R

S

C

R

A

M

B

L

E

R

S

U

M

1-bit

DAC

1-bit

DAC

1-bit

DAC

1-bit

DAC

3

+

1-bit

DAC

X[n]

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

dac with dem9
DAC (With DEM)

DEM Code

E

N

C

O

D

E

R

S

C

R

A

M

B

L

E

R

S

U

M

1-bit

DAC

1-bit

DAC

1-bit

DAC

1-bit

DAC

3

+

1-bit

DAC

X[n]

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

dac with dem10
DAC (With DEM)

DEM Code

E

N

C

O

D

E

R

S

C

R

A

M

B

L

E

R

S

U

M

1-bit

DAC

1-bit

DAC

1-bit

DAC

1-bit

DAC

3

+

1-bit

DAC

X[n]

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

novelty
Novelty?
  • DEM Algorithms
    • How many switches?
      • RC ladder (L1, L2, … )
    • How to switch?
      • Glitches
    • How many samples per sum?
      • Accuracy
novelty12
Novelty?

S

C

R

A

M

B

L

E

R

S

U

M

1-bit

DAC

  • DEM Algorithms
    • How many switches?
      • RC ladder (L1, L2, … )
    • How to switch?
      • Glitches
    • How many samples per sum?
      • Accuracy

1-bit

DAC

1-bit

DAC

1-bit

DAC

+

1-bit

DAC

1-bit

DAC

-

1-bit

DAC

1-bit

DAC

novelty13
Novelty?
  • DEM Algorithms
    • How many switches?
      • RC ladder (L1, L2, … )
    • How to switch?
      • Glitches
    • How many samples per sum?
      • Accuracy
slide14

Quantization Noise

Mismatch Noise

Mismatch Noise DEM L2

Mismatch Noise DEM L3

noise shaping
Noise Shaping

Mismatch Noise First Order DEM

Mismatch Noise Second Order DEM

references
References
  • [1]  A low-complexity dynamic element matching technique for reduced-distortion digital-to-analog conversionJensen, H.T.; Jensen, J.F.;Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on , Volume: 2 , 30 May-2 June 1999
  • [2] A performance analysis of the partial randomization dynamic element matching DAC architectureJensen, H.T.; Galton, I.;Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on , Volume: 1 , 9-12 June 1997
  • [3]  Dynamic element matching techniques with arbitrary noise shaping functionHenderson, R.K.; Nys, O.J.A.P.;Circuits and Systems, 1996. ISCAS '96., 'Connecting the World'., 1996 IEEE International Symposium on , Volume: 1 , 12-15 May 1996
  • [4]  Dynamic element matching in D/A converters with restricted scramblingVesterbacka, M.; Rudberg, M.; Wikner, J.J.; Andersson, N.U.;Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on , Volume: 1 , 17-20 Dec. 2000
  • [5]  An analysis of dynamic element matching techniques in sigma-delta modulationNys, O.J.A.P.; Henderson, R.K.;Circuits and Systems, 1996. ISCAS '96., 'Connecting the World'., 1996 IEEE International Symposium on , Volume: 1 , 12-15 May 1996