Interpolation circuit for use in A/D converter

Details Interpolation circuit for use in A/D converter Interpolation circuit for use in A/D converter

1987-12-10

1990-03-27

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341155, 307354, H03M 136

Patent

active

049124692

ABSTRACT:
An interpolation circuit for use in an A/D converter comprises a first and a second pair of inputs (2, 2'; 3, 3') and at least three pairs of outputs (20, 20'; 24, 24'; 21, 21'). The pairs of inputs receive pairs of two input signals (V.sub.1, V.sub.1c, V.sub.5, V.sub.5c) which are substantially complementary to one another. At least two pairs of outputs (20, 20'; 24, 24') supply pairs of two substantially complementary output signals. A first output (21) of the third pair of outputs (21, 21') is coupled to a first input (2) of the first pair of inputs (2, 2'). The second output (21') of the third pair of outputs is connected to a circuit node which is not one of the inputs of the first pair of inputs. This node may be, for example, the first input (3') of the second pair of inputs (FIG. 9). Another possibility is to make the node one end (38) of an impedance element (32) whose other end is coupled to the second input (2') of the first pair of inputs (FIG. 3).

REFERENCES:
patent: 4270118 (1981-05-01), Brokaw
patent: 4386339 (1983-05-01), Henry et al.
patent: 4456904 (1984-06-01), Van De Grift
patent: 4737766 (1988-04-01), van de Plassche

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