Digital-to-analog conversion circuit based on exponent operation

• Main Authors: ZONG NIANKE, CHAI CHOON KOOI, CHEN SUFANG, ZHAI JUNTAO, YANG YANING, XING WEI
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY

The invention relates to a digital-to-analog conversion circuit based on exponent operation, which comprises N digital-to-analog conversion units with the same composition, and output signals of the N digital-to-analog conversion units are connected in parallel and added. The input signals of the digital-to-analog conversion units are the same and are Vin, and the reference voltage input signals are arithmetic progression. According to the invention, logarithm operation is carried out on input voltage, subtraction operation is carried out, and finally exponent operation is carried out. The equal-proportion output of the input and output voltages can be controlled by controlling the arithmetic progression of the reference voltage in the subtraction operation. Therefore, the control of any proportion can be realized only by accurately controlling the reference voltage in the subtraction operation, and specific circuit parameters do not need to be controlled, so that the realization of the digital-to-analog conv