In this paper, we present a high accuracy laser range finder and velocimeter using ultra-fast time-to-digital converter (TDC). The system operation is based on the measuring the round-trip time of a narrow laser pulse. A low-dark current high-speed PIN photodiode is used to detect the triggered laser beam and to produce start signal. The pulsed laser diode generates 45W optical power at 30ns du...

A 0.1–12GHz Low Noise Amplifier (LNA) with an active balun is proposed for multi-standard applications. In order to realize wideband matching and single-to-differential (S2D) conversion simultaneously, a single-end resistive negative feedback amplifier is adopted as the first stage for input impedance matching, and a novel active balun consisting of common source amplifier and source follower i...

Studies conducted on design and implementation of RF front-end for UWB in the 3.1-10.6 GHz range have been based on the intrinsically wideband approach .These include distributed grounded gate and source LNA with gains of 6 and 14 dB and noise figures of 3 and 5.3 dB respectively, wideband matched LNA with a gain of 7.5 dB, DLL at 528 MHz and PLL at 3.432 GHz for realizing multi-band OFDM carri...

In present day society where communication technologies are advancing at spiral rate, the need for efficient integrated circuit design to transmit and receive signals at unlicensed frequency spectrum is inevitable. This study tries to shed new light on the latter topic by evaluating the issues associated with the design in advanced CMOS technologies of a critical RF building block, namely a sin...

This paper presents a new variant of broadband Doherty power amplifier that employs a novel output combiner. A new parameter αα is introduced to permit a generalized analysis of the recently reported Parallel Doherty power amplifier (PDPA), and hence offer design flexibility. The circuit prototype of the new DPA fabricated using GaN devices exhibits maximum drain efficiency of 85% at 43-dBm pea...

Equivalent gain amplification and broadband networks matching of weak microwave signal are difficult in Ultra-wideband microwave receiver system. A highly integrated amplifier IC ADL5541 from ADI is adopted as the core unit in this paper, coordinate with an external matching network. The design can realize an Ultrawideband microwave amplifier with 15dB gain which works in the 500~4000MHz with +...

Design and simulation of 7 GHz CMOS wideband amplifier(CMOSWA) using a modified cascode circuit realized in 90-nm technology is presented here. The proposed system consists two stages, namely folded an inductively degenerated common source amplifier. experimented with without feedback network. This work discusses the performance variation as function reactive components, initial stage results 2...

iv interferer combinations that lead to in-band distortion in wideband receivers, resulting in challenging linearity requirements. At the start of this research project, the noise canceling technique was identified as a suitable candidate to implement wideband receiver frontends. In a preceding research project a number of noise canceling topologies were generated. One of these topologies, the ...

The theory, design and experimental results of a wideband 140 GHz, 1 kW pulsed gyro-traveling wave amplifier are presented. The gyro-TWA operates in the HE(0,6) mode of an overmoded quasi-optical waveguide using a gyrating electron beam. The electromagnetic theory, interaction theory, design processes and experimental procedures are described in detail. At 37.7 kV and 2.7 A beam current, the ex...