A digital-to-analog converter
A digital-to-analog converter and inverter technology, which is applied in the field of signal processing, can solve the problems of DAC output glitches, the influence of DAC circuit output characteristics, and the unsatisfactory glitch elimination, so as to reduce glitches and improve output characteristics.
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Embodiment 1
[0038] Please refer to figure 2 , figure 2 A schematic structural diagram of a digital-to-analog converter provided by the present invention;
[0039] The digital-to-analog converter, including:
[0040] The reference voltage setting device 11 is used to provide the reference voltage for the bit weight network 12;
[0041] The bit weight network 12 is connected to the operational amplifier 14 through N analog switch tubes 13, and is used to generate weight currents respectively on the N branches of the bit weight network 12 according to the reference voltage, wherein N is a positive integer;
[0042]N analog switch tubes 13 are used to respectively control the conduction or shutdown between the N branches and the operational amplifier 14 according to N digital signals, wherein each analog switch tube 13 includes an analog switch tube 13 for absorbing A charge absorption module 131 for parasitic charges released during switching transitions;
[0043] It can be understood ...
Embodiment 2
[0049] Please refer to image 3 , image 3 A schematic circuit diagram of an analog switching tube provided by the present invention;
[0050] The digital-to-analog converter provided in this embodiment is based on the previous embodiment:
[0051] Preferably, the charge absorbing module 131 includes a first charge absorbing unit N5 and a second charge absorbing unit N6;
[0052] The analog switch tubes 13 also include a first inverter 132, a second inverter 133, a first switch circuit 134, and a second switch circuit 135, wherein the first charge absorbing unit N5 is located in the first switch circuit 134, and the second The second charge absorption unit N6 is located in the second switch circuit 135;
[0053] The input terminal of the first inverter 132 inputs a digital signal, and the output terminal of the first inverter 132 is connected to the input terminal of the second inverter 133;
[0054] The first switch circuit 134 also includes a first NMOS transistor N1 and...
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