Abstract: A subsystem configured to implement an analog to digital converter that includes a high speed comparator with an embedded reference voltage level that functions as a calibrated threshold. A calibration element applies power to a reference voltage system. The calibration element then selects a differential analog voltage and applies the differential analog voltage to the inputs of the comparator. A digitally coded signal then configures an array of switches that connect complements of integrated resistors to each input of the comparator so that the switching point of the comparator occurs coincident with the applied differential analog reference voltage, nulling out the effect of the applied differential analog voltage and comparator errors. The calibration element then removes power from the reference voltage system. As a result, the comparator is configured with an embedded threshold that equals the differential analog reference voltage.

Abstract: A subsystem configured to implement an analog to digital converter that includes a high speed comparator with an embedded reference voltage level that functions as a calibrated threshold. A calibration element applies power to a reference voltage system. The calibration element then selects a differential analog voltage and applies the differential analog voltage to the inputs of the comparator. A digitally coded signal then configures an array of switches that connect complements of integrated resistors to each input of the comparator so that the switching point of the comparator occurs coincident with the applied differential analog reference voltage, nulling out the effect of the applied differential analog voltage and comparator errors. The calibration element then removes power from the reference voltage system. As a result, the comparator is configured with an embedded threshold that equals the differential analog reference voltage.

Abstract: A subsystem configured to implement an analog to digital converter that includes a high speed comparator with an embedded reference voltage level that functions as a calibrated threshold. A calibration element applies power to a reference voltage system. The calibration element then selects a differential analog voltage and applies the differential analog voltage to the inputs of the comparator. A digitally coded signal then configures an array of switches that connect complements of integrated resistors to each input of the comparator so that the switching point of the comparator occurs coincident with the applied differential analog reference voltage, nulling out the effect of the applied differential analog voltage and comparator errors. The calibration element then removes power from the reference voltage system. As a result, the comparator is configured with an embedded threshold that equals the differential analog reference voltage.

Abstract: An apparatus comprises a selected volume detector that detects a selected output volume; an analog output signal amplifier; a digital volume amplifier; a boost gain control element coupled to the selected volume detector; the analog output signal amplifier; and the digital volume amplifier; wherein the boost gain control element is configured to: keep a gain of a path of the digital volume amplifier and the analog output signal amplifier substantially constant, wherein the boost gain control element can adjust both: a) a gain of the digital volume control; and b) a gain of the analog output signal amplifier; to keep the gain of the path of the digital volume amplifier and the analog output signal substantially constant and equal to the selected output volume.

Abstract: An apparatus comprises a selected volume detector that detects a selected output volume; an analog output signal amplifier; a digital volume amplifier; a boost gain control element coupled to the selected volume detector; the analog output signal amplifier; and the digital volume amplifier; wherein the boost gain control element is configured to: keep a gain of a path of the digital volume amplifier and the analog output signal amplifier substantially constant, wherein the boost gain control element can adjust both: a) a gain of the digital volume control; and b) a gain of the analog output signal amplifier; to keep the gain of the path of the digital volume amplifier and the analog output signal substantially constant and equal to the selected output volume.