Abstract: Techniques for improving a power supply accuracy of a precision data converter system, such as analog-to-digital converter circuits (ADCs) and digital-to-analog converter circuits (DACs). Improving the power supply accuracy can enable a reference voltage to be as large as possible, thereby increasing the signal-to-noise-ratio (SNR). The techniques can also simplify power supply sequencing requirements for the data converter system.

Abstract: Techniques for improving a power supply accuracy of a precision data converter system, such as analog-to-digital converter circuits (ADCs) and digital-to-analog converter circuits (DACs). Improving the power supply accuracy can enable a reference voltage to be as large as possible, thereby increasing the signal-to-noise-ratio (SNR). The techniques can also simplify power supply sequencing requirements for the data converter system.

Abstract: An error amplifier circuit is provided having a pair of current mirror transistors driven by a pair of current sources, where one of the current mirror transistors operates at a lower current density than the other, and further having a resistor in an emitter circuit of the transistor operating at the lower current density and a summing node in the emitter circuit between the emitter of the one transistor and the resistor. A feedback circuit including a second resistor and a base-emitter circuit of a third transistor is in series between a feedback node coupled to the base of the feedback transistor and the summing node, such that a current from the feedback circuit is summed with the current conducted by the emitter of the one transistor. The error amplifier is balanced when the voltage at the feedback node is equal to a predetermined voltage, which can have substantially zero temperature coefficient at a voltage as low as one bandgap voltage.

Abstract: A bias generator circuit having a zero-current shutdown state is provided. When on, the bias generator circuit provides substantially constant bias currents (sourcing and/or sinking) and may be selectively turned on and off in response to first and second control signals. When the bias generator is off, it is in a zero-current shutdown state such that substantially no quiescent current is used.

Abstract: A method of laundering soiled fabrics comprises contacting the fabrics in an aqueous laundering solution with a granular detergent composition comprising at least about 1% by weight of a surfactant, at least about 1% by weight of a builder, from about 6% to about 9% by weight of a particulate foam control agent, from about 1% to about 5% by weight of bleach activator, from about 0.3% to about 7% by weight of a peroxygen bleaching agent and from about 0.05% to about 0.2% by weight of a cellulase enzyme, wherein the detergent composition produces the low level of foam required for optimal cleaning in washing machines employing a low water wash process.