Self-calibrating buffered voltage DAC

• Main Authors: MO YIKUN, YAO HONGYAN, CAO LINHAO, JIN JIE, ZHANG YIZHONG, WANG SITONG
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2024
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY

The present disclosure relates to a self-calibrating buffer voltage DAC, comprising: a DAC configured to receive an input digital signal and output a first analog voltage signal; a buffer amplifier configured to receive the first voltage signal from the DAC and provide a buffered second analog voltage signal; a voltage-frequency converter configured to selectively receive the first voltage signal and the second voltage signal and provide a first output signal and a second output signal at respective first and second frequencies; a counter configured to receive the output signal from the voltage-to-frequency converter and provide respective first and second digital output signals corresponding to respective first and second frequencies; a comparator configured to receive the first digital output signal and the second digital output signal and provide a digital calibration offset; and a DAC error code module configured to receive the digital input code and the digital calibration offset and provide the offset-c