Abstract: The invention provides an analog switching device adapted to compensate for the effects of high frequency input signals. By providing a high pass filter between the input or output nodes and the control node it is possible to effectively introduce a portion of the high frequency component of the input signal to the control node, thereby reducing the differential between the nodes.

Abstract: A charge redistribution analog-to-digital converter. This converter includes an offset correcting circuit operatively connected in parallel with a capacitor array and responsive to a sampling input of the analog-to-digital converter, and a gain correcting circuit operatively connected in parallel with a sampling capacitor and responsive to the sampling input of the analog-to-digital converter. In another general aspect, an analog-to-digital converter calibration method for a charge redistribution analog-to-digital converter, that includes adjusting an input offset of an input of the analog-to-digital converter and adjusting a gain offset of the analog-to-digital converter. The steps of adjusting are then repeated until a predetermined level of error is achieved for the analog-to-digital converter.

Abstract: Performing a coarse conversion of an analog signal to a coarse digital representation using a first analog-to-digital converter, transferring the coarse representation to a second converter, and performing a fine analog-to-digital conversion of the signal using the coarse representation as a starting value for a fine digital representation. The fine conversion can include a redundant portion that can be used to correct a mismatch between the coarse and fine conversions, and this correction can operate according to a combinatorial transfer function. The fine conversion may include switching from a coarse reference to a fine reference after transferring the coarse representation. The fine conversion can also include comparing an amount of charge in a sampling capacitor after performing the coarse conversion.