Digital-to-analogue converting apparatus and method
A technology of digital-to-analog conversion and digital signal conversion, which is applied in the field of digital-to-analog conversion devices and can solve problems such as enlarged area
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[0035] As shown in circle 4, the digital-to-analog conversion device 3 of the first embodiment includes: an operational amplifier 31, n first capacitors C1, C2,..., Cn, a second capacitor Ci, a number of switches Si and Sj, and A first switch Sa and two second switches S1 and S2. The operational amplifier 31 has a short-circuited positive input terminal 311, a negative input terminal 312, and an output terminal 313, and is connected to the negative input terminal 312 and the output terminal The feedback capacitor CFB between 313, the switch Sj is connected to the right end of each of the first capacitors C1, C2,..., Cn, and both ends of the second capacitor Ci, and the switch Si is connected to each of the first capacitors C1, C2 ,..., the left end of Cn, the switch Si connects the left end of each of the first capacitors C1, C2,..., Cn to two reference voltages of a reference voltage Vr+ or Vr-, wherein the voltage value of the reference voltage Vr+ is greater than The voltage va...
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