A 1.1-V analog multiplexer with an adaptive digital clamp for CMOS video digitizers
We present the design of an integrated multiplexer and a dc clamp for the input analog interface of a high-speed video digitizer in the 1.1-V 65-nm complementary metal-oxide-semiconductor process. The ac-coupled video signal is dc restored using a novel all-digital current-mode charge pump. An eight...
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| Main Authors: | , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
August 21, 2014
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| In: |
IEEE transactions on circuits and systems. 2, Express briefs
Year: 2014, Volume: 61, Issue: 11, Pages: 860-864 |
| ISSN: | 1558-3791 |
| DOI: | 10.1109/TCSII.2014.2350332 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1109/TCSII.2014.2350332
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| Author Notes: | P. Angelov, S.A. Aamir, J.J. Wikner |
MARC
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| 245 | 1 | 2 | |a A 1.1-V analog multiplexer with an adaptive digital clamp for CMOS video digitizers |c P. Angelov, S.A. Aamir, J.J. Wikner |
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| 520 | |a We present the design of an integrated multiplexer and a dc clamp for the input analog interface of a high-speed video digitizer in the 1.1-V 65-nm complementary metal-oxide-semiconductor process. The ac-coupled video signal is dc restored using a novel all-digital current-mode charge pump. An eight-input multiplexer is realized with T-switches, each containing two series-connected bootstrapped switches. A T-switch's grounding branch is merged with the pull-down end of the clamping charge pump. An adaptive digital feedback loop encompassing a video analog-to-digital converter (ADC) controls the clamp charge pump. The bootstrapped switches have been adapted to suit the video environment, allowing on-the-fly recharging. The varying on-resistance of the conventional bootstrapped switch is utilized to linearize the multiplexer response by canceling the effect of the nonlinear load capacitance contributed by the clamp transistors. Under worst case conditions, the multiplexer maintains a 62-85-dB spurious-free dynamic range over a range of known input video frequencies, and it reduces the second-order harmonic component upon optimization. The dc clamp provides 12-bit precision over the full range of the video ADC and can set the dc at the target level for at most 194 video lines. | ||
| 650 | 4 | |a AC-coupled video signal | |
| 650 | 4 | |a adaptive digital clamp | |
| 650 | 4 | |a adaptive digital feedback loop | |
| 650 | 4 | |a ADC control | |
| 650 | 4 | |a all-digital current-mode charge pump | |
| 650 | 4 | |a analog multiplexer | |
| 650 | 4 | |a Analog multiplexer | |
| 650 | 4 | |a analog-to-digital converter | |
| 650 | 4 | |a analogue-digital conversion | |
| 650 | 4 | |a bootstrap circuits | |
| 650 | 4 | |a bootstrapped switch | |
| 650 | 4 | |a Capacitance | |
| 650 | 4 | |a Capacitors | |
| 650 | 4 | |a Charge pumps | |
| 650 | 4 | |a clamp charge pump | |
| 650 | 4 | |a Clamps | |
| 650 | 4 | |a CMOS integrated circuits | |
| 650 | 4 | |a CMOS video digitizers | |
| 650 | 4 | |a complementary metal-oxide-semiconductor process | |
| 650 | 4 | |a complementary metal-oxide-semiconductor (CMOS) low voltage | |
| 650 | 4 | |a direct current (dc) clamp | |
| 650 | 4 | |a input analog interface | |
| 650 | 4 | |a Multiplexing | |
| 650 | 4 | |a multiplexing equipment | |
| 650 | 4 | |a nonlinear load capacitance | |
| 650 | 4 | |a on-the-fly recharging | |
| 650 | 4 | |a second-order harmonic component | |
| 650 | 4 | |a series-connected bootstrapped switches | |
| 650 | 4 | |a size 65 nm | |
| 650 | 4 | |a spurious-free dynamic range | |
| 650 | 4 | |a storage capacity 12 bit | |
| 650 | 4 | |a T-switch | |
| 650 | 4 | |a T-switch grounding branch | |
| 650 | 4 | |a Transistors | |
| 650 | 4 | |a video analog front end (AFE) | |
| 650 | 4 | |a video equipment | |
| 650 | 4 | |a voltage 1.1 V | |
| 700 | 1 | |a Aamir, Syed Ahmed |e VerfasserIn |0 (DE-588)1181379075 |0 (DE-627)1662668317 |4 aut | |
| 700 | 1 | |a Wikner, J. Jacob |e VerfasserIn |0 (DE-588)1223633594 |0 (DE-627)1743108796 |4 aut | |
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