نتایج جستجو برای: high psrr
تعداد نتایج: 2059186 فیلتر نتایج به سال:
In this paper, we investigate the parameters affecting Total Harmonic Distortion (THD) and Power Supply Rejection Ratio (PSRR) in PWM Class D Amplifiers (CDAs) on the basis of linear models with feedback. From our mathematical analysis, we show that the THD of a PWM Class D amplifier with feedback can be improved by increasing the gain of the integrator through adding another amplifier at the o...
applications such as high definition viedeo reproduction, portable computers, wireless, and multimedia demand, and ever-increasing need for ligh-frequency high-resolution and low-power analog-to-digital converters. flash, two-step flash, and pipeline convertors are fast but consume large amount of power and require large area. to overcome these problems, successive approximation converter blo...
in this project, some new polyaspartimides, (pas)s, have been synthesized form michael addition reaction between new synthetic bismaleimide (bmi) and some aromatic diamines. a characteristic property of this polyaspartimides is a pendent carboxylic group, which introduced to these polymers from new bismaleimide. bismaleimides (bmi) is one of the interesting compounds, which can be self-polymeri...
this study aimed at examining the effects of iranian efl learners’ anxiety, ambiguity tolerance, and gender on their preferences for corrective feedback (cf, henceforth). the effects were sought with regard to the necessity, frequency, and timing of cf, types of errors that need to be treated, types of cf, and choice of correctors. seventy-five iranian efl students, twenty-eight males and forty...
A novel architecture and design approach which make it possible to boost the bandwidth slew-rate performance of operational transconductance amplifiers (OTAs) are proposed employed a low-power OTA with top-of-class small-signal large-signal figures merit (FOMs). The makes enhance gain, for given power consumption capacitive load, achieving more than an order magnitude better comparable conventi...
in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...
growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...
This paper describes the PLL designed for the analog front-end of the silicon tuner in the cable modem system. The PLL is used to generate clocks (150-175MHz) for the DAC and hence the phase noise (jitter) requirement is very aggressive (15ps rms, which is less than 1 degree of integrated phase error). Low noise design for all the main blocks was a key to achieve this. Care was taken to reduce ...
9 Abstract—This paper presents design concept of Operational Transconductance Amplifier (OTA). The 0.18μm CMOS process is used for Design and Simulation of this OTA. This OTA having a bias voltage 1.8 with supply voltage, the design and Simulation of this OTA is done using CADENCE Specters environment with UMC 0.18μm technology file. The Simulation results of this OTA shows that the open loop g...
To overcome the limitation of the silicon energy gap in electron volts 1.2V wluch leads to tllat the voltage reference is fixed at about 1.2V. a design of current-mode (CM) architecture CMOS bandgap voltage reference with afiitnry voltage value by setting tlie resistor value is presented liere with Ion 1.8-V power supply. Tlie siniiilation results indicate a temperature coefficient (TC) of jppm...
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