DIGITAL-TO-ANALOG CONVERTER TRANSFER FUNCTION MODIFICATION

• Main Authors: S/O DING JUNBIAO, O'DONNELL JOHN JUDE, LIU TONY YINCAI, DEMPSEY DENNIS A
• Format: Patent
• Language: Chinese; English
• Published: 24.03.2020
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY

The invention relates to a digital-to-analog converter transfer function modification. 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 currentsmay 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. 本公开涉及数模转换器传输函数修改。本公开涉及数模转换器(DAC)，包括电阻器串和传输函数修改电路。传输函数修改电路可以是用于校准DAC的校准电路。校准电路可包括多个电流源，其可以是电流DAC。每个电流DACS将电流注入电阻器串的相应节点或从电阻器串的相应节点漏电流，以便校正电压误差。注入的电流可以是正的或负的，这取决于电压误差。电流DAC由调整码控制，调整码取决于给定电阻器串的测量或模拟电压误差。