VOLTAGE SUPPLY FOR SUPPLYING IN ZONES VOLTAGES PROPORTIONAL TO A MASTER SUPPLY VOTLAGE USING VOLTAGE MIRRORING

摘要

A scaled voltage supply to supply voltage biases to circuits in voltage zones. The scaled voltage supply includes a master voltage corresponding to a voltage drop across a master-upper rail having a voltage Vdd and a master-lower rail having a voltage Vss=0. Further, the supply includes a voltage-divider network dividing the master voltage Vdd into intermediate voltages αVdd, βVdd, etc., wherein α and β are predetermined constants. These intermediate voltages scale with the master voltage and are supplied to the voltage zones using non-invasive soft rails. In one implementation the soft rails use voltage mirrors to supply the intermediate voltages to the circuits within voltage zones.

主权项

1. A voltage supply, comprising:
a voltage-divider network configured to divide a master voltage into at least one intermediate voltage; a plurality of voltage zones, each voltage zone including at least one main circuit; at least one soft rail configured to supply a voltage bias to the plurality of voltage zones, the voltage of the at least one soft rail being the at least one intermediate voltage; and at least one buffer circuit configured to provide the voltage bias to the at least one soft rail and configured to maintain the voltage of the at least one soft rail at the at least one intermediate voltage.