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This paper discusses the design considerations of Silicon-based Mach–Zehnder Modulator (MZM) transmitters, consisting of the design of a Si-Photonic MZI modulator and a CMOS-based modulator driver. III–V and silicon-photonic MZMs are compared with respect to electrode design, driving scheme, and velocity matching. A 25-Gb/s hybrid-integrated silicon photonic MZM transmitter is then demonstrated, composed...
In this paper a 1V 15-bit ΔΣ ADC for audio application is presented. Second order modulator with feed-forward path is adopted in order to reduce the swing of each integrator. Non-linear gain effect is mitigated. Single stage amplifier with high power efficiency is employed to save power. Decimation filter is implemented with seven-stage cascade sub-filters. Timing multiplexing and resource reuse methodology...
A single-loop second-order 3 bits ΔΣ modulator in 180 nm standard CMOS is presented. The design is intended to achieve high linearity in low-voltage low-power environment. The modulator achieves 89-dB SNDR and 98-dB SFDR in 20Hz~16kHz signal bandwidth, while the power consumption is 210 μW under 1-V supply voltage.
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