Constructive Placement and Routing for Common-Centroid Capacitor Arrays in Binary-Weighted and Split DACs

Karmokar, Nibedita; Sharma, Arvind K.; Poojary, Jitesh; Madhusudan, Meghna; Harjani, Ramesh; Sapatnekar, Sachin S.

doi:10.1109/tcad.2023.3238880

Cited by 5 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly applying "AA/y=0" ensures (15) and thus match any combination of order that has n odd (n, nm, nm 2 , etc) while we apply "AA/x=0" to guarantee (16) and match all terms containing m odd (m, nm, n 2 m, etc). Equations ( 15) and ( 16) prove that by just a simple reflection and rotation between quadrants, we can match devices regardless of any odd gradient errors.…”

Section: B the Matching Criteriamentioning

confidence: 99%

“…Several layout techniques and algorithms [13]- [27] have been proposed to improve matching. In, [13]- [15] they discussed the widely used common centroid layout pattern where every device is divided into multiple segments, and these segments are arranged in a pattern to ensure that their spatial centers align with each other. Common centroid layout cancels only linear gradient effects.…”

Section: Introductionmentioning

confidence: 99%

“…(15) and (16) are derived from a single row or column analysis. (15) is derived from (12) while (16) is derived from the column counterpart of(12).…”

mentioning

confidence: 99%

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Matching Critical Analog Circuit Components up to 3rd Order Gradients for All Possible Exact Matching Ratios

Sekyere,

Bruce,

Yang

et al. 2024

Preprint

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This paper presents a systematic approach to generate layouts for two devices, with an arbitrary integer ratio of device sizes, that cancels up to at least 3 rd order gradient effects. A new analysis leads to mathematical constraints on 1dimensional layouts that meet the required integer ratio and cancel 2 nd-order gradients. From those layouts, we apply reflection and rotation symmetries to generate 2-dimensional layouts that cancel higher-order gradients. Importantly, our procedures can handle ”dummy lanes” to ensure ”routability”. Furthermore, we discuss evaluation metrics that identify which of the multiple gradient canceling layout is best for any fixed rectangular grid and device application.

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Section: B the Matching Criteriamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%