A digital bandpass delta-sigma modulator (BPDSM) with an SNR of 74 dB at a bandwidth of 20 MHz is proposed. A time-interleaved structure and optimized sparse-tree adders ensure a high sampling frequency and thus a high input signal frequency range. The concept is based on static CMOS gates using a commercial 65 nm process. Simulations indicate a sampling frequency up to 6.6 GHz and a signal fre...

A novel technique for a self-equalized distributed amplifier is presented by showing the analogy between transversal filters and distributed amplifier topologies. The appropriate delay and gain coefficients of amplifier circuit are obtained by a Fourier expansion of the raised cosine spectrum in the frequency range of 0-40GHz.

We propose a self-biased inverter-based amplifier for realizing high-speed low-power second-order single-loop continuous-time bandpass delta-sigma modulator (CT-BP- ΔΣM). The design is amenable to nanoscale CMOS and exploits single pseudo-differential inverter with positive feedback replace conventional op-amps used in an integrator configuration. also uses 5-bit asynchronous successive approxi...

In this paper a new method for the design of a linear phase distributed amplifier in 180nm CMOS technology is presented. The method is based on analogy between transversal filters and distributed amplifiers topologies. In the proposed method the linearity of the phase at frequency range of 0-50 GHz is obtained by using proper weighting factors for each gain stage in cascaded amplifier topology....

in this paper we introduce a simple, computationally inxepentsive, adaptive recursive structure for enhancing bandpass signals highly corrupted by broad-band noise. this adaptive algorithm, enhancing input signals, enables us to estimate the center frequency and the bandwidth of the input signal. in addition, an important feature of the proposed structure is that the conventional bias existing ...

the graphical technique for nonlinear circuits was described that enable us to optimize circuits to obtain maximum output power, maximum efficiency or minimum intermodulation. according to this method a high power amplifier in the ka band was designed. using a nonlinear model of the transistor, optimum slope for load-line was determined so that maximum power at the output was obtainable, then ...

This paper presents an optimization method of wideband filtering power amplifier (PA) with high efficiency. In order to achieve the expected efficiency in wide passband and reduce design difficulty, a high-performance area-based impedance target for computer-aided automatic is proposed, which avoids unexpected degradation caused by conventional target. meanwhile, out-of-band described also prop...

external amplifier was able to detect the sound waves from microphone on speaker and oscilloscope. The maximum amplitude of output speech signal of amplifier is 45 mV, and the maximum output of MEMS microphone is 1.125 µV.

Acknowledgements I would like to express my gratitude to all those who gave me the possibility to complete this thesis. Special thanks are due to my advisor Dr. Phillip Allen for his expert guidance, stimulating suggestions, constant encouragement and never-ending supports. I would like to thank my thesis reading committee Dr. Dave Hertling and Dr. Marshall Leach, Jr., my thesis defense committ...

Abstract Fourier domain mode-locked (FDML) lasers are frequency-swept that operate in the near-infrared region and allow for attainment of a large sweep-bandwidth, high sweep-rate, narrow instantaneous linewidth, all which usually quite desirable characteristics laser. They used various sensing imaging applications but most commonly noted their practical use optical coherence tomography (OCT). ...