Minimizing effects of switching noise in mixed signal chips

An integrated circuit, comprising:

• (a) a first circuit section having a local ground and coupleable through a resistor to an external ground of a power supply for the first circuit section, wherein a power supply current flows through the resistance when the first circuit section is on, thereby causing an IR drop between the local ground and the external ground, whereby said IR drop introduces an offset potential to the local ground potential when the first circuit section is on;
• and
• (b) a second circuit section having a signal-generating device and an offset correction circuit coupled to either an input or output terminal of the signal-generating device, wherein the signal-generating device is coupled at a reference ground terminal to the local ground and is for providing an output signal related to an input signal applied thereto and the offset correction circuit is for subtracting an offset adjust value from either the input signal or the output signal to reduce an offset error in the output signal caused by switching the first circuit section on and off.