An apparatus comprising: a plurality of amplifiers (122, 132, 142; 232; 312, 322, 332, 342; 412, 422, 432, 442; 512, 522, 532, 542; 710, 720, 730, 740), each amplifier having an input terminal and an output terminal; characterized by a plurality of capacitors (124, 134, 144; 234; 314, 324, 334, 344; 414, 424, 434, 444; 514, 524, 534, 544), wherein each capacitor of the plurality of capacitors is coupled to the output terminal of a respective one of the plurality of amplifiers; an output circuit (150, 350, 450, 550, 650, 750) coupled to the capacitors and configured and arranged to combine the outputs of the amplifiers as passed via the respective capacitors onto a common output terminal; and an input circuit configured and arranged to process an input signal to provide a plurality of processed signals which are offset in phase relative to other ones of the processed signals such that, if combined with the other processed signals, undesirable components are cancelled, wherein the undesirable components include one or more of out-of band spurs, spectral replicas, quantization noise, and out-of-band modulation, and couple respective ones of the processed signals to an input terminal of respective ones of the plurality of amplifiers, thereby cancelling the undesirable components upon combination of the outputs of the amplifiers at the output circuit, wherein the input circuit includes a plurality of delay circuits (326, 336, 346; 416, 426, 436, 446; 526, 536, 546) configured and arranged to offset the phase of the processed signals by delaying the signals as provided to respective ones of the amplifiers with a constant delay relative to the signal provided to the previous amplifier. a plurality of amplifiers (122, 132, 142; 232; 312, 322, 332, 342; 412, 422, 432, 442; 512, 522, 532, 542; 710, 720, 730, 740), each amplifier having an input terminal and an output terminal; characterized by a plurality of capacitors (124, 134, 144; 234; 314, 324, 334, 344; 414, 424, 434, 444; 514, 524, 534, 544), wherein each capacitor of the plurality of capacitors is coupled to the output terminal of a respective one of the plurality of amplifiers; an output circuit (150, 350, 450, 550, 650, 750) coupled to the capacitors and configured and arranged to combine the outputs of the amplifiers as passed via the respective capacitors onto a common output terminal; and an input circuit configured and arranged to process an input signal to provide a plurality of processed signals which are offset in phase relative to other ones of the processed signals such that, if combined with the other processed signals, undesirable components are cancelled, wherein the undesirable components include one or more of out-of band spurs, spectral replicas, quantization noise, and out-of-band modulation, and couple respective ones of the processed signals to an input terminal of respective ones of the plurality of amplifiers, thereby cancelling the undesirable components upon combination of the outputs of the amplifiers at the output circuit, process an input signal to provide a plurality of processed signals which are offset in phase relative to other ones of the processed signals such that, if combined with the other processed signals, undesirable components are cancelled, wherein the undesirable components include one or more of out-of band spurs, spectral replicas, quantization noise, and out-of-band modulation, and couple respective ones of the processed signals to an input terminal of respective ones of the plurality of amplifiers, thereby cancelling the undesirable components upon combination of the outputs of the amplifiers at the output circuit, wherein the input circuit includes a plurality of delay circuits (326, 336, 346; 416, 426, 436, 446; 526, 536, 546) configured and arranged to offset the phase of the processed signals by delaying the signals as provided to respective ones of the amplifiers with a constant delay relative to the signal provided to the previous amplifier.