Abstract: A voltage-divider circuit, including: a network of discrete resistors defining T tiers of resistors, where T?2, the T tiers comprising first and subsequent tiers, the Xth tier including at least one Xth-tier resistor where X=1, and the Xth tier including at least two Xth-tier resistors for each value of X in the range 2?X?T, wherein, for each value of X in the range 1?X<T: each Xth-tier resistor is connected between a pair of nodes of the voltage-divider circuit at which a relatively high and low voltage signal are provided, respectively; at least one Xth-tier resistor is implemented as a subdivision network of discrete resistors; and for each Xth-tier resistor implemented as a subdivision network, that subdivision network includes a main resistor connected in series with a corresponding auxiliary resistor, that main resistor implemented as a base resistor connected in parallel with a series connection of a plurality of X+1th-tier resistors.

Abstract: Voltage regulator circuitry, comprising: a pull-up path connected between a high-voltage supply and an output node for supplying a pull-up current from the high-voltage supply to the output node; a pull-down path connected between the output node and a low-voltage supply for drawing a pull-down current from the output node to the low-voltage supply; and a controller comprising pull-up control circuitry operable to control the pull-up current and pull-down control circuitry operable to control the pull-down current, so as to regulate an output voltage signal provided at the output node at a target voltage level even when an output current drawn from the output node along an output current path by a load varies over a range of positive and negative values, wherein the pull-down control circuitry is operable to: obtain measures of the pull-up current; and control the pull-down current based on the measures using at least one of proportional, integral and derivative control.

Abstract: A voltage-divider circuit, including: a network of discrete resistors defining T tiers of resistors, where T?2, the T tiers comprising first and subsequent tiers, the Xth tier including at least one Xth-tier resistor where X=1, and the Xth tier including at least two Xth-tier resistors for each value of X in the range 2?X?T, wherein, for each value of X in the range 1?X<T,: each Xth-tier resistor is connected between a pair of nodes of the voltage-divider circuit at which a relatively high and low voltage signal are provided, respectively; at least one Xth-tier resistor is implemented as a subdivision network of discrete resistors; and for each Xth-tier resistor implemented as a subdivision network, that subdivision network includes a main resistor connected in series with a corresponding auxiliary resistor, that main resistor implemented as a base resistor connected in parallel with a series connection of a plurality of X+1th-tier resistors.

Abstract: Voltage regulator circuitry, comprising: a pull-up path connected between a high-voltage supply and an output node for supplying a pull-up current from the high-voltage supply to the output node; a pull-down path connected between the output node and a low-voltage supply for drawing a pull-down current from the output node to the low-voltage supply; and a controller comprising pull-up control circuitry operable to control the pull-up current and pull-down control circuitry operable to control the pull-down current, so as to regulate an output voltage signal provided at the output node at a target voltage level even when an output current drawn from the output node along an output current path by a load varies over a range of positive and negative values, wherein the pull-down control circuitry is operable to: obtain measures of the pull-up current; and control the pull-down current based on the measures using at least one of proportional, integral and derivative control.