TW200713850A - Sigma-delta modulator, D/A conversion system and dynamic element matching method - Google Patents
Sigma-delta modulator, D/A conversion system and dynamic element matching methodInfo
- Publication number
- TW200713850A TW200713850A TW094133739A TW94133739A TW200713850A TW 200713850 A TW200713850 A TW 200713850A TW 094133739 A TW094133739 A TW 094133739A TW 94133739 A TW94133739 A TW 94133739A TW 200713850 A TW200713850 A TW 200713850A
- Authority
- TW
- Taiwan
- Prior art keywords
- elements
- sigma
- delta modulator
- dynamic element
- groups
- Prior art date
Links
Abstract
A sigma-delta modulator. The sigma-delta modulator comprises a summer, a loop filter, a quantizer, a D/A converter and a dynamic element matching logic. The summer receives an analog input signal and a feedback signal to generate an error signal to the loop filter which generates a filtered signal to the quantizer, thereby converting the filtered signal to a quantized output signal to the D/A converter including D/A elements and generating the feedback signal corresponding to selected D/A elements thereof. The dynamic element matching logic coupled between the quantizer and D/A converter selects the D/A elements of the D/A converter, wherein it divides the D/A elements into groups, where the number of the groups is prime to that of the D/A elements, and then selects the groups and D/A elements thereof according to the quantized output signal and the previous selection of groups and D/A elements.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94133739A TWI301705B (en) | 2005-09-28 | 2005-09-28 | Sigma-delta modulator, d/a conversion system and dynamic element matching method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94133739A TWI301705B (en) | 2005-09-28 | 2005-09-28 | Sigma-delta modulator, d/a conversion system and dynamic element matching method |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200713850A true TW200713850A (en) | 2007-04-01 |
TWI301705B TWI301705B (en) | 2008-10-01 |
Family
ID=45070308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW94133739A TWI301705B (en) | 2005-09-28 | 2005-09-28 | Sigma-delta modulator, d/a conversion system and dynamic element matching method |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI301705B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI381654B (en) * | 2009-05-04 | 2013-01-01 | ||
TWI392240B (en) * | 2008-09-01 | 2013-04-01 | Mediatek Inc | Continuous-time sigma-delta modulator using dynamic element matching having low latency and dynamic element matching method thereof |
-
2005
- 2005-09-28 TW TW94133739A patent/TWI301705B/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI392240B (en) * | 2008-09-01 | 2013-04-01 | Mediatek Inc | Continuous-time sigma-delta modulator using dynamic element matching having low latency and dynamic element matching method thereof |
TWI381654B (en) * | 2009-05-04 | 2013-01-01 |
Also Published As
Publication number | Publication date |
---|---|
TWI301705B (en) | 2008-10-01 |
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