Differential Amplifier Dynamic Current Boosting for Faster Slew Rate

The patent applies dynamics by making the current supply to the input circuit stage dynamic rather than static. The boosting circuit stage dynamically adjusts the current supplied to the input circuit stage based on the operating conditions, enabling the amplifier to achieve high slew rate during transient periods while maintaining low power consumption during steady-state operation. This is achieved through dynamic current boosting that activates only when needed for signal transitions.

The patent segments the amplifier into distinct functional stages: an input circuit stage, a boosting circuit stage, a current mirror circuit stage, and an output circuit stage. This segmentation allows each stage to be optimized independently - the input stage for low power consumption and the boosting stage for high-speed performance when needed. The current mirror circuit stage further segments the current paths to enable selective current boosting to different parts of the amplifier.

The patent implements periodic action by providing current boosts only during the periods when signal transitions occur, rather than maintaining elevated current continuously. The boosting circuit stage activates dynamically during transient periods when slew rate is needed and remains inactive during steady-state periods, achieving high performance only when required. This periodic current boosting eliminates the need for continuous high static current.

The patent changes the current parameter dynamically based on operating conditions. The boosting circuit stage modifies the current supplied to the input circuit stage according to the instantaneous demand, increasing current during transitions to improve slew rate and maintaining low current during steady-state to reduce power consumption. This parameter change is achieved through dynamic control of the boosting circuit based on differential input voltages.