Switched-capacitor array

Details Switched-capacitor array Switched-capacitor array

1998-06-16

1999-09-14

Nguyen, Matthew

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

H03M 112

Patent

active

059529520

ABSTRACT:
A binary-weighted capacitor array is applicable for use in analog-to-digital or digital-to-analog converters, switched-capacitor filters, etc. A plurality of unit capacitors are arranged in a lateral row. The row is laid out in parallel to a switch array so that each metal interconnect between a unit capacitor and a corresponding switch is of a uniform length. This layout eliminates several limitations commonly found in capacitor arrays, including: top-plate parasitic error due to metal interconnections and metal overlap; ratio error due to oxide thickness gradients; and edge-definition errors.

REFERENCES:
patent: 4200863 (1980-04-01), Hodges et al.
patent: 4517549 (1985-05-01), Tsukakoshi
patent: 4876544 (1989-10-01), Kuraishi
patent: 4937578 (1990-06-01), Shioda
patent: 4975701 (1990-12-01), Babanezhad et al.
patent: 5608345 (1997-03-01), Macbeth et al.
patent: 5684487 (1997-11-01), Timko

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