US 12,547,194 B2 · Common bias control for devices having uncorrelated power supplies

Abstract

A device and method for generating a common bias for a device component having a first circuit powered by a first power supply and a second circuit powered by a second power supply. A method includes: arranging a circuit path in a ring oscillator to replicate a logic depth of both the first circuit and the second circuit, wherein the ring oscillator is controlled by the common bias and a first portion of the circuit path is powered by the first power supply and a second portion of the circuit path is powered by the second power supply; outputting an oscillating signal from the ring oscillator; computing common bias voltages based on the oscillating signal; and applying the common bias voltages to the device component.

Claims20

Dependent claims

A semiconductor device, comprising:

a bias generator that generates a common bias including a p-well voltage and an n-well voltage;
a device component controlled by the common bias, wherein the device component includes a first circuit powered by a first power supply and a second circuit powered by a second power supply;
and
a control circuit that includes:
a ring oscillator controlled by the common bias and coupled to the first power supply and the second power supply, wherein an output of the ring oscillator comprises an oscillating signal, and
control logic for selecting the p-well voltage and the n-well voltage for the bias generator based on the output of the ring oscillator.

3 more elements

Dependencies are inferred from the claim text.

Common bias control for devices having uncorrelated power supplies

Life of this patent

Common bias control for devices having uncorrelated power supplies

Life of this patent

Abstract

Claims20