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I am looking for a DAC design wıth NMOS and PMOS transistors as a part of a project, most of the DAC circuits that I found were builted with R-2R or with capacitors. But I need a design with MOS transistor since the porject will be implemented on Cadence and space consideration is important. DAC will be used both in 8-bit SAR ADC and in smooting filter. Sample block diagram of the project is given below, ı could not find appropriate design for DAC. Any help will be appreciated, thanks in advance. enter image description here

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    \$\begingroup\$ This question is very broad. DAC designs are often proprietary, meaning owned by the company that designed it. You should have a look in literature (IEEE journals etc.) to see how CMOS DACs are generally made. Do you have any experience in designing analog circuits? Most CMOS processes not only have MOS transistors but also resistors. You sound inexperienced in the field of DAC design, then designing one will be a project on its own. \$\endgroup\$ – Bimpelrekkie Jan 23 at 12:36
  • \$\begingroup\$ Replace the resistors in your R-2R ladder with mosfets and you got your DAC. \$\endgroup\$ – Linkyyy Jan 23 at 14:29
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Maybe something like this

schematic

simulate this circuit – Schematic created using CircuitLab

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