Abstract: A D/A converter having reference node for receiving a reference voltage and together network having a network reference bus connected to the reference node by way of a first electrical connection. The converter network produces a series of reference outputs derived from the reference voltage in response to a digital input applied to the converter, with the converter network sinking a network reference current at the network reference bus which varies with the converter digital input. A reference current compensator circuit is included which provides a compensation current at the network reference bus having a magnitude which varies in response to at least a portion of the digital input, with the compensation current operating to reduce variations in current through the first electrical connection caused by changes in the digital input.

Abstract: A D/A converter having reference node for receiving a reference voltage and together network having a network reference bus connected to the reference node by way of a first electrical connection. The converter network produces a series of reference outputs derived from the reference voltage in response to a digital input applied to the converter, with the converter network sinking a network reference current at the network reference bus which varies with the converter digital input. A reference current compensator circuit is included which provides a compensation current at the network reference bus having a magnitude which varies in response to at least a portion of the digital input, with the compensation current operating to reduce variations in current through the first electrical connection caused by changes in the digital input.

Abstract: Within one embodiment, a voltage detector circuit detects whether a voltage supply (e.g., VDD) is in a high or low range and generates a logic output. Using this logic output, a variable RC (resistor capacitor) VDD filter may be implemented such that at high VDD the amount of resistance is increased, thereby increasing the decoupling on the VDD line and reducing the size of current spikes on VDD. This is particularly useful in circuits that function over a wide range of VDD supply. The voltage detector circuit can also be used in other embodiments as well. For example, the voltage detector circuit may be used to change the drive strength (e.g., effective W/L) of an output driver such that more drive is provided at low VDD and less at high VDD thereby having the effect of reducing rise/fall time variation and reducing the size of current spikes at high VDD.