Youngjoong Joo

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A noble pulse shaping method to generate an ultra wideband (UWB) pulse is designed and tested with the AMI 0.5-/spl mu/m CMOS process. The output pulse width is 2.4 ns, and the average power consumption is 1.159 mW with pulse repletion frequency (PRF) of 20 MHz. Test results show the feasibility of all digital low power UWB pulse generator design which(More)
—This paper evaluates the potential for the real-time utilization of high frame rate image sequences using a fully parallel readout system. Multiple readout architectures for high frame rate imaging are compared. The application domain for a fully parallel readout system is identified, and the design for a fully parallel, monolithically integrated smart(More)
— The combination of resonant tunneling diodes (RTD's) and complementary metal-oxide-semiconductor (CMOS) silicon circuitry can offer substantial improvement in speed, power dissipation, and circuit complexity over CMOS-only circuits. We demonstrate the first integrated resonant tunneling CMOS circuit, a clocked 1-bit comparator with a device count of six,(More)
We discuss the design of a smart multispectral imaging system which can be fabricated with independently optimized detector arrays and Si CMOS circuits, which are stacked in three dimensions on top of one another for complete physical registration of the multispectral image. This smart multispectral imager utilizes the heterogeneous integration of thin film(More)
In this paper, the design and simulation of a CMOS ultra-wideband pulse generator using TSMC 0.18µm CMOS technology is presented. The operating frequency band of the pulse generator is from 3 to 10 GHz for the application of ultra-wideband (UWB) communications. The structure of the impulse generator is based on the current-steering digital-to-analog(More)
An ultra-wideband (UWB) pulse generator using a pulse combination method is analyzed. The proposed analytical model characterizes the transient behavior of the pulse generation circuit. The spectral response of the analytical model shows high relevance with the objective Gaussian pulse, which can be used to modify the spectral response of the UWB signal.(More)