Differential capacitance sampler

A differential capacitance sampling array, comprising:

• a plurality of differential capacitance samplers, each sampler including:
• a balanced pulse generator which concurrently produces first and second complementary charging pulses at respective first and second terminals, wherein the first charging pulse is a positive-going pulse and the second charging pulse is a negative-going pulse;
• a bridge circuit having a first branch and a second branch connected between a first node coupled to the first terminal of the balanced pulse generator and a second node coupled to the second terminal of the balanced pulse generator, and including a differential capacitance, the bridge circuit producing an output signal in response to the charging pulses of the pulse generator, which output signal changes in value due to changes in the differential capacitance;
• and
• a signal processor which processes the output signal of the bridge circuit to provide an output signal of the differential capacitance sampler;
• wherein the periodic charging pulses produced by the balanced pulse generators of the plurality of differential capacitance samplers have identical frequencies but respectively different phases.