Abstract: A frontend circuit of a time-interleaved ADC is provided. The frontend circuit can include a track-and-hold circuit to sample an analog input signal to the ADC, a sub-ADC circuit to convert the sampled analog input signal to a digital output signal, and a source-follower circuit. An input of the source-follower circuit can be coupled to an output of the track-and-hold circuit, and an output of the source-follower circuit can be coupled to an input of the sub-ADC circuit. The source-follower circuit is to provide buffering between the track-and-hold circuit and the sub-ADC circuit. The circuit further includes a common-mode-adjusting circuit to dynamically adjust common-mode settings of the time-interleaved ADC. While adjusting the common-mode settings, the common-mode-adjusting circuit can adjust, separately, an input common-mode voltage of the track-and-hold circuit and an input common-mode voltage of the sub-ADC circuit based on current Process, Voltage, and Temperature (PVT) conditions.

Abstract: A TI-ADC circuit and method therefor include the use of first and second level clock generators configured to receive an asynchronous reference clock signal and generate a plurality of first and second clock signals, the second level clock generator including a plurality of clock dividers connected in series, respective ones of the plurality of clock dividers being configured to divide an input clock signal in accordance with a synchronization signal; a plurality of T/H circuits respectively configured to operate in accordance with one of the first clock signals; a plurality of sub-ADCs respectively configured to operate in accordance with one of the second clock signals, thereby to sample an input signal in a time-interleaved manner, wherein for a given clock divider of the plurality of clock dividers, the synchronization signal corresponds to an output clock of a clock divider immediately upstream from the given clock divider.

Abstract: A frontend circuit of a time-interleaved ADC is provided. The frontend circuit can include a track-and-hold circuit to sample an analog input signal to the ADC, a sub-ADC circuit to convert the sampled analog input signal to a digital output signal, and a source-follower circuit. An input of the source-follower circuit can be coupled to an output of the track-and-hold circuit, and an output of the source-follower circuit can be coupled to an input of the sub-ADC circuit. The source-follower circuit is to provide buffering between the track-and-hold circuit and the sub-ADC circuit. The circuit further includes a common-mode-adjusting circuit to dynamically adjust common-mode settings of the time-interleaved ADC. While adjusting the common-mode settings, the common-mode-adjusting circuit can adjust, separately, an input common-mode voltage of the track-and-hold circuit and an input common-mode voltage of the sub-ADC circuit based on current Process, Voltage, and Temperature (PVT) conditions.

Abstract: There is disclosed in one example a communication apparatus, including: an analog data source; a digital communication interface; and an analog-to-digital converter (ADC) circuit assembly, including: an analog sample input; an input clock to provide frequency fin; a time-interleaved front end to interleave n samples of the analog sample input; and an ADC array including n successive-approximation register (SAR) ADCs, the SAR ADCs including self-clocked comparators and configured to operate at a frequency no less than f in n .

Abstract: There is disclosed in one example a communication apparatus, including: an analog data source; a digital communication interface; and an analog-to-digital converter (ADC) circuit assembly, including: an analog sample input; an input clock to provide frequency fin; a time-interleaved front end to interleave n samples of the analog sample input; and an ADC array including n successive-approximation register (SAR) ADCs, the SAR ADCs including self-clocked comparators and configured to operate at a frequency no less than f in n .