6th Summer School on “ADC & DAC Metrology”

PETR ČESÁK

Czech Technical University

PhD Student

Analysis of the system for dynamic ADC testing

Prague, Czech Republic

Czech Technical University

System for dynamicADC testing

band-stop filter

generator digitizer PC

deviceunder test

common band-pass filter

Atten.6 dB

A

B

A

B

BAND-PASS FILTER

Cva

C2

L1

Cvb

L2 C3L3

C1 Output

Input

BAND-STOP FILTER

C1

L3

C3

C2

L2 OutputInput

L1

Distortion recalculated to the band-pass filter output (measured in dB)

  common low-cost filters high-quality filters

4.416 MHz

9.485 MHz

19.51 MHz

4.416 MHz

9.485 MHz

19.51 MHz

THD –109 –108 –96 < –130 < –130 < –130

SFDR 111 109 97 > 139 > 139 > 139

Frequency spectra of testing signalswith frequency is 19.5 MHz

SETUP: generator – band-pass filter –attenuator 6 dB – band-stop filteramplifier +25 dB – digitizer NI PXI-5122

band-stop filter

generator digitizer PC

deviceunder test

common band-pass filter

Atten.6 dB

A

B

A

B

Faculty: www.fel.cvut.cz

Department: measure.feld.cvut.cz

Email: cesakp1@fel.cvut.cz

Thank you for your attention