Current-Steering DAC Power Switching for High-Gain Efficiency

The patent implements dynamic power switching that adapts the power supply voltage based on the digital input code value. When the input code indicates low signal levels, the DAC switches to a lower supply voltage, reducing power consumption while maintaining adequate conversion accuracy. This dynamic adaptation resolves the contradiction by making power consumption variable rather than fixed, allowing high current gain to be used only when necessary for accuracy while reducing power during low-signal periods.

The patent changes the supply voltage parameter dynamically based on the input signal characteristics. By adjusting the voltage parameter according to the digital input code, the system maintains conversion accuracy when needed while reducing power consumption during normal operation. This parameter change strategy directly addresses the contradiction between accuracy and power consumption by optimizing the voltage level for each operating condition.

The patent employs dynamic switching between different supply voltages based on the input code requirements. By dynamically adjusting the voltage level, the system maintains reliable switching operations at lower voltages during normal operation and only uses high voltage when conversion accuracy demands high current gain. This prevents continuous voltage drop issues while preserving accuracy when needed.

The patent implements periodic switching between different power supply modes based on the signal requirements. The DAC alternates between low-voltage mode for normal operation and high-voltage mode when accuracy is critical, preventing sustained voltage drop conditions that cause non-ideal switching while maintaining conversion accuracy during critical periods.

The patent implements dynamic power management where current sources are selectively activated or deactivated based on the input code value and signal requirements. Instead of keeping all current sources continuously on, the system dynamically enables only the necessary current sources for the current conversion task, maintaining conversion speed when needed while eliminating power waste during idle or low-precision operations.

The patent applies different power states to different current sources within the DAC based on local requirements. Each current source or group of current sources can be independently controlled, allowing the system to maintain high conversion speed in critical paths while powering down non-critical current sources. This local quality approach optimizes the balance between speed and power consumption on a per-component basis.