Sub-range flash analog-to-digital converter

Details Sub-range flash analog-to-digital converter Sub-range flash analog-to-digital converter

1998-03-03

1999-10-26

Young, Brian

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341155, H03M 112

Patent

active

059736321

ABSTRACT:
A sub-range flash ADC having correction circuits for dealing with conversion errors induced by the coarse comparison in the thermal code format. Fine thermal codes accompanied by extension codes may be used to decide whether a conversion error has happened and what kind of conversion error it is. After determining whether a conversion error has occurred, the coarse thermal codes are shifted right or left by one bit, similar to the addition or subtraction mathematical operation, to obtain corrected coarse thermal codes. In addition, the fine thermal codes (including the extension thermal codes) are shifted left or right by a bit length equal to the fine thermal codes, similar to the subtraction and addition operation, to obtain corrected fine thermal codes. These corrected coarse and fine thermal codes can be directly used for encoding without any further correction process.

REFERENCES:
patent: 5099240 (1992-03-01), Nakatani et al.
patent: 5400029 (1995-03-01), Kobayashi
patent: 5621409 (1997-04-01), Cotter et al.
patent: 5682163 (1997-10-01), Hsu
patent: 5726653 (1998-03-01), Hsu et al.
patent: 5745067 (1998-04-01), Chou et al.
patent: 5748132 (1998-05-01), Matsuzawa
patent: 5841389 (1998-11-01), Kinugasa et al.

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