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A scaled 40 Gb/s optical receiver incorporating a transimpedance amplifier (TIA), a limiting amplifier (LA), a clock and data recovery (CDR), and a 1:4 demultiplexer was proposed in 65 nm CMOS technology. The TIA employs a regulated cascode structure to achieve low input resistance and a stable dc operating point, whereas the LA adopts the third-order interleaving active feedback technique to obtain...
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