A rail-to-rail ping-pong op-amp |
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| Authors: | Opris I.E. Kovacs G.T.A. |
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| Affiliation: | Center for Integrated Syst., Stanford Univ., CA ; |
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| Abstract: | A rail-to-rail ping-pong op-amp achieves offset cancellation and 1/f noise reduction without folding of the input spectrum. The clocking scheme minimizes the clock feedthrough and the residual offset due to charge injection. With a clock frequency of 100 kHz, the residual offset is less than 100 μV, and the input referred noise is about 225 nV/Hz 1/2. The rail-to-rail distortion at 1 kHz is lower than -71 dB. The total silicon area is 610×420 μm2, and the circuit dissipates 1.5 mW from a single 5 V supply |
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