Resistive DAC with summing junction switches, current output reference, and output routing methods

A digital-to-analog converter (DAC), comprising:

• a first output current generator configured to generate, based on a first reference voltage, a first output current;
• and
• a first switch coupled to the first output current generator, wherein the first switch is configured for coupling to an input of an amplifier through a sense path and configured for coupling to an output of the amplifier through a force path,
• wherein:
• the DAC is configured to sense a voltage at the input through the sense path;
• the first switch is configured to provide the first output current to the output through the force path;
• and
• first portions of the force and sense paths are configured in a star configuration and second portions of the force and sense paths are configured in a tree configuration, with the first portions positioned between the first switch and the second portions.

A digital-to-analog converter (DAC), comprising:

• an output current generator configured to generate an output current based on a reference voltage;
• and
• a reference voltage generator configured to generate and adapt the reference voltage to compensate for an impedance of the output current generator,
• wherein the DAC further comprises:
• one or more semiconductor dies having formed thereon the output current generator and the reference voltage generator, wherein the reference voltage generator is configured to adapt the reference voltage to compensate for variations in the impedance due to process variations of the one or more semiconductor dies;
• and
• a second impedance external to the one or more semiconductor dies and configured to set the reference voltage.

A digital-to-analog converter (DAC), comprising:

• an output current generator configured to generate an output current based on a reference voltage;
• and
• a reference voltage generator configured to generate and adapt the reference voltage to compensate for an impedance of the output current generator,
• wherein the DAC further comprises:
• a plurality of output current generators, including:
• the output current generator;
• and
• a second output current generator configured to generate a second output current based on a second reference voltage;
• and
• a plurality of reference voltage generators, including:
• the reference voltage generator;
• and
• a second reference voltage generator configured to generate and adapt the second reference voltage to compensate for an impedance of the second output current generator.

A digital-to-analog converter (DAC), comprising:

• an output current generator configured to generate an output current based on a reference voltage;
• and
• a reference voltage generator configured to generate and adapt the reference voltage to compensate for an impedance of the output current generator,
• wherein the DAC further comprises:
• a current mirror, including:
• a first side having the reference voltage generator thereon, wherein the reference voltage generator is configured to produce the reference voltage on the first side;
• and
• a second side having the output current generator thereon, wherein the current mirror is configured to reproduce the reference voltage on the second side for the output current generator.