A modified version of 12-bit tracking analog to digital converter for high-stability output tracking
In this paper a 12-bit tracking analog-to-digital converter (ADC) is designed and its performance is verified. It continuously tests the analog input signal and makes correction when necessary. The resulting digital equivalent of the analog input signal is continuously updated. The least significant...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2007
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| Online Access: | http://eprints.utp.edu.my/425/1/paper.pdf http://www.scopus.com/inward/record.url?eid=2-s2.0-57949109491&partnerID=40&md5=dc1fea16a6cfa058755a0b2f788a856e http://eprints.utp.edu.my/425/ |
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| Summary: | In this paper a 12-bit tracking analog-to-digital converter (ADC) is designed and its performance is verified. It continuously tests the analog input signal and makes correction when necessary. The resulting digital equivalent of the analog input signal is continuously updated. The least significant bit (LSB) of this converter jumps up and down to track the analog input. The digital output therefore permanently jumps between two subsequent bits, B<sub>n</sub> and B<sub>n+1</sub>. To overcome the problem of instability in the digital output the 12-bit tracking ADC is modified by introducing the test bit B <sub>0</sub>. The test bit is designed to have a voltage equals to that of the LSB. It always sets or resets in tracking the analog value. Using this technique the digital output B<sub>1</sub> to B<sub>12</sub> of the converter is maintained stable. Test and measurements are performed in the converter circuit to demonstrate the practicality of this version. ©2007 IEEE.
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