Flash analog-to-digital converter comparator reference arrangeme

Details Flash analog-to-digital converter comparator reference arrangeme Flash analog-to-digital converter comparator reference arrangeme

1995-05-01

1998-06-02

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

H03M 136

Patent

active

057607290

ABSTRACT:
A circuit reduces the total number of resistors needed to provide the reference voltages to the plurality of comparators in a flash analog-to-digital converter. In such a circuit, a first string of unit resistances having a first plurality of taps is coupled to a second string of unit resistances having first and second ends and a second plurality of taps between the ends. A first active device has an input coupled to a first tap of the first string of unit resistances and an output coupled to the first end of the second string of unit resistances. A second active device has an input coupled to a second tap of the first string of unit resistances and an output coupled to the second end of the second string of unit resistances.

REFERENCES:
patent: 4496935 (1985-01-01), Inoue et al.
patent: 4992874 (1991-02-01), Willis et al.
patent: 5343199 (1994-08-01), Sugawa
Sanyo Fisher Service Corporation, TV Training Manual TV-013, "Introduction to Picture-In-Picture (PIP) Circuitry", pp. 6-7, published in 1992 in the USA.

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