Structured Design Based on the Inversion Factor Parameter: Case Study of ΔΣ Modulator System
This paper presents the design flow from system-level specifications to transistor-level design for three different fully-differential amplifiers composing the first and the second integrator of a second-order hybrid multi-bit ΔΣ modulator. The circuit-level specifications for each amplifier are ext...
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| creator | Stefanovic, D. Pesenti, S. Pastre, M. Kayal, M. |
| description | This paper presents the design flow from system-level specifications to transistor-level design for three different fully-differential amplifiers composing the first and the second integrator of a second-order hybrid multi-bit ΔΣ modulator. The circuit-level specifications for each amplifier are extracted using behavioral models and time-domain system-level simulations with a SNDR target value of 93 dB ± 2 dB. The amplifiers are designed using the structured analog design methodology consisting of circuit partitioning into basic analog blocks, specification derivation for each basic block, and transistor sizing in a specific design sequence. Transistor-level design is based on the choice of the inversion factor and the transistor length to achieve the required specifications of each block. After all three analog amplifiers are sized, the system-level performance is confirmed by time-domain simulations, and the obtained SNDR value is within the specified range. |
| doi_str_mv | 10.1109/MIXDES.2007.4286127 |
| format | Conference Proceeding |
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| ispartof | 2007 14th International Conference on Mixed Design of Integrated Circuits and Systems, 2007, p.95-102 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Circuit simulation Circuit topology Computer aided software engineering Design methodology Feedback Folded cascode OTA Frequency Fully-differential amplifier topology gm/ID methodology Inversion factor Polarization Structured analog design Time domain analysis Transconductance Transistor-level design Voltage ΔΣ modulator |
| title | Structured Design Based on the Inversion Factor Parameter: Case Study of ΔΣ Modulator System |
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