Saman Saeedi

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— A low-power high-speed optical receiver in 28nm CMOS is presented. The design features a novel architecture combining a low-bandwidth TIA front-end, double-sampling technique and dynamic offset modulation. The low-bandwidth TIA increases receiver's sensitivity while adding minimal power overhead. Functionality of the receiver was validated and the design(More)
— A low-power high-speed frequency synthesizer in 65nm CMOS is presented. The design features a novel architecture combining an LC quadrature VCO, two sample-and-holds, a phase interpolator, digital coarse-tuning and a novel quadrature frequency detection technique for fine-tuning. The system works based on injecting the rising edges of reference clock. The(More)
With continuous demand for higher bandwidth chip-to-chip communication, signaling over wires has become extremely challenging [1]. Optical signaling is an attractive alternative due to its small frequency-dependent loss and higher bandwidth. Recent advances in silicon photonic devices and 3D integration [2] have enabled them to be a viable solution for(More)
We present a scheme for thermal stabilization of micro-ring resonator modulators through direct measurement of ring temperature using a monolithic PTAT temperature sensor. The measured temperature is used in a feedback loop to adjust the thermal tuner of the ring. The closed-loop feedback system is demonstrated to operate in presence of thermal(More)
Modern SoC systems impose stringent requirements on on-chip clock generation and distribution. Ring-oscillator (RO) based injection-locked (IL) clocking has been used in the past [1] to provide a low-power, low-area and low-jitter solution. Ring-based injection-locked oscillators (ILO) can also be used to generate quadrature phases from a reference clock(More)
—This paper presents a low-power first-order frequency synthesizer architecture suitable for high-speed on-chip clock generation. The proposed design features an architecture combining an LC quadrature voltage-controlled oscillator (VCO), two sample-and-holds, a phase interpolator, digital coarse-tuning and rotational frequency detection for fine-tuning.(More)
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