DAC having switchable current sources and resistor string

Details DAC having switchable current sources and resistor string DAC having switchable current sources and resistor string

2006-05-16

2006-05-16

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S154000

Reexamination Certificate

active

07046182

ABSTRACT:
A DAC architecture is provided which is monotonic in operation despite any mismatches in the components. The architecture is a segmented architecture and hence it is area efficient. This is achieved by effecting a generation of analog voltages by driving current sources to resistors in response to digital input. In a preferred embodiment, the invention provides a resistor string coupled between output and vref-, and set of current sources. The current sources are switched to nodes between resistors to generate voltages at the output.

REFERENCES:
patent: 3699568 (1972-10-01), Thompson et al.
patent: 5612696 (1997-03-01), Kim
patent: 5726652 (1998-03-01), Giuroiu
patent: 5943000 (1999-08-01), Nessi et al.
patent: 6225929 (2001-05-01), Beck
patent: 6683549 (2004-01-01), Kinugasa

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