Domino-Logic-Based ADC for Digital Synthesis
| Autor: | Nima Maghari, Skyler Weaver, Benjamin Hershberg, Un-Ku Moon |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
business.industry
Ripple Electrical engineering Hardware_PERFORMANCEANDRELIABILITY Propagation delay Effective number of bits CMOS Logic gate Distortion Domino logic Hardware_INTEGRATEDCIRCUITS Electronic engineering Harmonic Hardware_ARITHMETICANDLOGICSTRUCTURES Electrical and Electronic Engineering business Mathematics |
| Zdroj: | IEEE Transactions on Circuits and Systems II: Express Briefs. 58:744-747 |
| ISSN: | 1549-7747 |
| DOI: | 10.1109/tcsii.2011.2168019 |
| Popis: | A low-power synthesizable analog-to-digital converter (ADC) is presented. By cascading many digital-like domino-logic cells whose propagation delay is influenced by an analog input voltage, a digital value is obtained at the end of the allowed ripple period by determining the number of cells that the ripple passed through. The sample-and-hold is simply a bootstrapped switch into a small sampling capacitor. As each domino-logic cell passes the ripple, charge is kicked back onto the input capacitor, which creates a significant second harmonic. Distortion caused by even harmonics is canceled by implementing a pseudodifferential structure. A test chip is fabricated in 0.18-μm CMOS. The test chip achieves over 5.4-bit effective number of bits up to 50 MS/s with a 1.3-V supply. With a sampling frequency of 50 MS/s and a 24-MHz input, a 34.2-dB signal-to-noise-plus distortion ratio is achieved while consuming 433 μW and occupying only 0.094 mm2. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|