hamidyadegaramin
Newbie level 4
Hi
i have designed a 6-Bit second order Current steering DAC. As, one for MSB with total (1 m A) and the other one as the LSB (0.25 m A). the Data comes from a Sigma-Delta modulator with desired noise shaping figure.
i simulated both of DACs separately and compared their output with the inputs. there were no specific harmonic distortion. However, when i sum up their current (MSB + LSB), third order distortions appears.
PS: i directly attach their outputs to each other and flow the current on a resistive load as shown in fig.
i have designed a 6-Bit second order Current steering DAC. As, one for MSB with total (1 m A) and the other one as the LSB (0.25 m A). the Data comes from a Sigma-Delta modulator with desired noise shaping figure.
i simulated both of DACs separately and compared their output with the inputs. there were no specific harmonic distortion. However, when i sum up their current (MSB + LSB), third order distortions appears.
PS: i directly attach their outputs to each other and flow the current on a resistive load as shown in fig.