Digital-to-analog converter with dynamic matching and bit splitt

Details Digital-to-analog converter with dynamic matching and bit splitt Digital-to-analog converter with dynamic matching and bit splitt

1996-08-23

1998-06-02

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341144, H03M 168

Patent

active

057607265

ABSTRACT:
A digital-to-analog (D/A) converter (400) receives a N bit digital signal S.sub.N by a signal divider (440) which divides it into digital group signals S.sub.Nk. In converter blocks (401.sub.k), these digital group signals S.sub.Nk are then separately converted into analog group signals S.sub.Gk. In a summation circuit (460) these analog group signals S.sub.Gk are combined to the analog signal S.sub.A. The converter blocks (401.sub.k) can comprise banks (430.sub.k) with, e.g., current sources whose currents I.sub.i are combined into the analog group signal S.sub.Gk selectively according to the digital group signal S.sub.Nk. The converter blocks (401.sub.k) can include circuits to equalize component variations, such as dynamic matching circuits (480.sub.k). The converter blocks (401.sub.k) can be configured according to the significance of the digital group signals S.sub.Nk and the hardware can be optimized.

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