Low noise current steering DAC

Details Low noise current steering DAC Low noise current steering DAC

2009-04-01

2010-12-07

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S118000, C341S120000

Reexamination Certificate

active

07847717

ABSTRACT:
A low noise current steering digital-to-analog converter (DAC). The DAC includes a current reference for generating a bias current that biases a set of current elements. The set of current elements includes a reference element. The current reference includes a reference amplifier and a reference arm. The reference arm includes a reference resistor and the reference element. The DAC further includes a switch periodically coupling each current element including the reference element, to the reference resistor and an output of the DAC. This rotates the set of current elements and attenuates flicker noise from each of the set of current elements.

REFERENCES:
patent: 4280091 (1981-07-01), Hiltner
patent: 6373266 (2002-04-01), Carelli et al.
patent: 7639081 (2009-12-01), Arakali et al.
patent: 7639781 (2009-12-01), Shampine et al.
patent: 7714756 (2010-05-01), Huang et al.

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