Single-ended to differential amplification and pipeline analog-to-digital conversion for digitally controlled dc-dc converters

A system, comprising:

• a difference amplifier to amplify a voltage difference between an analog signal and a reference level and to output a corresponding difference signal and an inverted difference signal;
• a bias adjustable switched capacitor sample and amplify circuit to sample the difference signal and the inverted difference signal, to amplify and center corresponding samples about a common mode, and to output the amplified centered samples as a differential signal, the switched capacitor sample and amplify circuit including a bias adjustable current source to control a bandwidth of the switched capacitor sample and amplify circuit;
• and
• a differential input pipeline analog-to-digital converter to convert the differential signal to digital values corresponding to voltage levels of the time-multiplexed analog signals.

A method, comprising:

• time-multiplexing a plurality of analog signals;
• amplifying a difference between the time-multiplexed analog signals and a reference level to generate an amplified difference signal and a corresponding inverted amplified difference signal;
• sampling the amplified difference signal and the inverted amplified difference signal;
• amplifying and adjusting samples of the amplified difference signal and the inverted amplified difference signal about a common mode to generate an amplified differential signal corresponding to the samples;
• adjusting a bandwidth of the amplifying;
• and
• converting the amplified differential signal to digital values.