نتایج جستجو برای: cmos op amp

تعداد نتایج: 118415  

1998
Ahmed M. Soliman

In this brief, it is shown that two of the recently reported voltage mode and current mode current conveyor-based all-pass circuits can be generated from the well known single input op amp all-pass configuration. It is also found that two other voltage mode current conveyor-based all-pass circuits are related directly to the differential input op amp all-pass structure. Several new grounded cap...

2012
Tejmal S. Rathore Uday P. Khot

Abstract— This paper proposes a procedure for converting a class of Op Amp-, FTFN-, CCand CFAbased voltage mode circuits to corresponding current mode circuits without requiring any additional circuit elements and finally from Op Amp-based voltage mode circuits to any of the FTFN, CC and CFA current mode circuits. The latter circuits perform better at high frequency than the former ones. The va...

2017
Rajashri Deshmukh Deepak Dandekar Maneesh Menon Karan Dhall Anu Gupta Nitin Chaturvedi Hitesh Shrimali Anshu Gupta D. K. Mishra R. Khattri Vito Giannini Andrea Baschirotto

In a never-ending effort to reduce power consumption and gate oxide thickness, the integrated circuit industry is constantly developing smaller power supplies. Furthermore, in an effort to reduce costs and integrate analog and digital circuits onto a single chip, MOS devices are used in the weak inversion region or the subthreshold inversion region to minimize dc source power. A feasible config...

1999
E. Bidari M. Keskin Franco Maloberti Un-Ku Moon Jesper Steensgaard Gabor C. Temes

One of the key limitations of state-of-the-art fine linewidth CMOS technologies is the restricted power-supply voltage, limited by the low junction-breakdown voltage of the process and by the thin gate oxide, prone to voltage stress and breakdown. Also, in some applications, the available external power source may limit the supply voltage; for example, this source may be a 1.2 V battery, with a...

1999

Operational amplifiers (op amps) are as prolific in analog circuits as salt and pepper is on food. They are sprinkled throughout the sensor data acquisition system, performing a variety of functions. For instance, at the sensor interface, amplifiers are used to buffer and gain the sensor output. The current or voltage excitation to the sensor, quite often is generated by an amplifier circuit. F...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده فنی 1391

در این پروژه به بررسی سیستمی یک حسگر هوشمند دما در تکنولوژی استاندارد m?7/0 cmos پرداخته ایم. این حسگر از تابعیت دمایی ولتاژ بیس امیتر ترانزیستورهای دوقطبی پارازیتی موجود در این تکنولوژی استفاده می کند. سیگنال خروجی این حسگر یک موج مربعی است که duty cycle آن به صورت خطی وابسته به دما است. در حال حاضر، نمونه ی مشابهی از این مدار در تکنولوژی bjt در بازار موجود است، اما به دلیل تفاوت های بنیادی بی...

2013
Mingyuan Ren Tong Wu Changchun Dong Linghai Cui

The design of single loop two-order Delta-Sigma modulator with feed forward structure is presented in this thesis. Oversampled analog-to-digital converters based on second-order delta-sigma modulation are attractive for VLSI implementation because they are especially tolerant of circuit nonidealities and component mismatch. The noise shaping and oversampling are used in this modulator, the over...

2003
Sunghyun Kim Sang-geun Lee Sekwang Park

This research is about a thermal flow sensor, suggesting a new structure to improve the detection of airflow directions in any flow direction as well as to realize its interface circuit with simple OP amp circuits. A flow direction sensor was fabricated using MEMS technology. Pt was used as resistive material because of its very stable physical properties. The structure of the sensor, consistin...

2009
Jingwen Ouyang Jeffrey Hinrichs Christopher J. Terman

Comparator-Based Switched-Capacitor (CBSC) is a relatively new topology that replaces opamps in sampled-data systems with a comparator and a set of current mirrors. CBSC is expected to lower power consumption, and to avoid several delicate tradeoffs of op-amp circuits. In this paper, the original single-ended CBSC block is extended to a fully differential version. The differential CBSC is then ...

2008
Wilmar Hernandez

In this paper an input-output transfer function analysis based on the frequencyresponse of a photometer circuit based on operational amplifier (op amp) is carried out. Opamps are universally used in monitoring photodetectors and there are a variety of amplifierconnections for this purpose. However, the electronic circuits that are usually used to carryout the signal treatment in photometer circ...

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