公开(公告)号：US10574247B1

公开(公告)日：2020-02-25

申请号：US16131886

申请日：2018-09-14

Applicant: Analog Devices Global Unlimited Company

Inventor： Junbiao Ding ,  Tony Yincai Liu ,  Dennis A. Dempsey ,  John Jude O'Donnell

IPC: H03M1/36 ,  H03M1/06 ,  H03M1/14 ,  H03H7/40 ,  H03H11/30

Abstract: The present disclosure relates to a digital-to-analog converter (DAC) which includes a resistor string and a transfer function modification circuit. The transfer function modification circuit may be a calibration circuit for calibrating the DAC, The calibration circuit may include a plurality of current sources, which may be current DACs. Each of the current DACS inject current into, or drain current from, a respective node of the resistor string, in order to correct for voltage errors. The injected currents may be positive or negative, depending on the voltage error. The current DACs are controlled by trim codes, which are set dependent on the measured or simulated voltage errors for a given resistor string.

公开(公告)号：US20200091923A1

公开(公告)日：2020-03-19

申请号：US16131886

申请日：2018-09-14

Applicant: Analog Devices Global Unlimited Company

Inventor： Junbiao Ding ,  Tony Yincai Liu ,  Dennis A. Dempsey ,  John Jude O'Donnell

IPC: H03M1/06 ,  H03M1/14 ,  H03M1/36 ,  H03H11/30 ,  H03H7/40

Abstract: The present disclosure relates to a digital-to-analog converter (DAC) which includes a resistor string and a transfer function modification circuit. The transfer function modification circuit may be a calibration circuit for calibrating the DAC, The calibration circuit may include a plurality of current sources, which may be current DACs. Each of the current DACS inject current into, or drain current from, a respective node of the resistor string, in order to correct for voltage errors. The injected currents may be positive or negative, depending on the voltage error. The current DACs are controlled by trim codes, which are set dependent on the measured or simulated voltage errors for a given resistor string.