Circuits with improved power supply rejection

摘要

Circuit comprising a noise suppressing circuitry ( 40 ) having an input ( 42 ) for a first voltage (VDD) and an output ( 43 ) for providing a supply voltage (VDDfiltered). The circuit further comprises a MOSFET-based switch ( 41 ) with a MOSFET (MP) being situated in a well, whereby a supply voltage (VDDfiltered) is applied to the well ( 67 ). The first voltage (VDD) is a global voltage used elsewhere in the same circuit, and the supply voltage (VDDfiltered) is less-noisy than the first voltage (VDD).