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By Fei Yuan

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Extra resources for CMOS current-mode circuits for data communications

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T^- For the same reason as that for t'c^-mismatch, Vr-niismatch is critical. In a similar manner as that of t'o^-mismatch, one can analyze the effect of t;/)5'-mismatch ^D2 = A{1 + Syj^g)iDl, where 5 . , , = ^ ^ . 8. (b) Two-finger layout Dimension mismatch of multi-finger transistors. 24) is the mismatch-induced output offset current and is denoted by ios- It consists of two components : the signal-dependent component iosi — SAii^ and the bias-dependent component ios2 = SAJ. ios2 can be removed by employing a two-phase clock that samples and holds the offset current in one clock phase and substrates the held offset current from the output current of the current amplifiers in the following clock phase [37-39].

10. Simulated output current without the balancing network (Standard deviation of dimension=10%, 20 samples). 11. Simulated output current with the balancing network (Standard deviation of dimension==10%, 20 samples). current of M2 is given by i]j2 = ^i(^m + Ji) and that of M3 is given by ^D3 = ^iHn + (^1 — ^c)Ji- If we impose Ai — Ac = I and J2 = ^2^1? the output current is given by io = AiA2iin' In addition to the power consumption reduction, the chip area is also reduced due to smaller M3 and M4.

8. (b) Two-finger layout Dimension mismatch of multi-finger transistors. 24) is the mismatch-induced output offset current and is denoted by ios- It consists of two components : the signal-dependent component iosi — SAii^ and the bias-dependent component ios2 = SAJ. ios2 can be removed by employing a two-phase clock that samples and holds the offset current in one clock phase and substrates the held offset current from the output current of the current amplifiers in the following clock phase [37-39].

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