طراحي و شبيه سازي تقويت كننده فيدبك جريان به كمك سلول چهارگانه تفاضلي

Design and simulation of current feedback op- amp using differential quartet

ﻃﺮاﺣﯽ آﻧﺎﻟﻮگ از دﯾﺮﺑﺎز ﺑﺮ ﭘﺎﯾﻪ ﭘﺮدازش ﺳﯿﮕﻨﺎل در ﺣﺎﻟﺖ وﻟﺘﺎژي اﺳﺘﻮار ﺑﻮده اﺳﺖ. ﺑﺎ اﯾﻦ وﺟﻮد روش ﻫﺎي ﺟﺮﯾﺎﻧﯽ ﭘﺮدازش ﺳﯿﮕﻨﺎل ﺑﻪ دﻟﯿﻞ اﻣﺘﯿﺎزات ذاﺗﯽ ﺧﻮد روز ﺑﻪ روز ﺗﻮﺟﻪ ﻃﺮاﺣﺎن را ﺑﯿﺸﺘﺮ ﺑﻪ ﺧﻮد ﺟﻠﺐ ﻣﯽ ﮐﻨﻨﺪ. اﯾﻦ اﻣﺘﯿﺎزات ذاﺗﯽ ﯾﻌﻨﯽ ﭘﻬﻨﺎي ﺑﺎﻧﺪ ﻋﺮﯾﺾ، ﻧﺮخ ﭼﺮﺧﺶ ﺑﺎﻻ، ﺗﻮان ﻣﺼﺮﻓﯽ ﭘﺎﯾﯿﻦ، ﺳﺎدﮔﯽ ﻣﺪار و ﮔﯿﻦ ﺟﺮﯾﺎﻧﯽ واﺣﺪ ﺧﺼﻮﺻﯿﺎﺗﯽ ﻫﺴﺘﻨﺪ ﮐﻪ اﻣﺮوزه ﺑﯿﺸﺘﺮ ﻣﻮرد ﺗﻮﺟﻪ ﻗﺮار ﮔﺮﻓﺘﻪ اﻧﺪ. ﻋﺪم ﻧﯿﺎز اﯾﻦ ﻧﻮع از ﻣﺪارﻫﺎ ﺑﻪ ﺑﻬﺮه وﻟﺘﺎژ ﺑﺎﻻ و اﻟﻤﺎن ﻫﺎي ﭘﺴﯿﻮ ﺑﺎ دﻗﺖ ﺑﺎﻻ اﯾﻦ اﻣﮑﺎن را ﻓﺮاﻫﻢ ﮐﺮده اﺳﺖ ﮐﻪ ﺑﺘﻮان آﻧﻬﺎ را ﺗﻘﺮﯾﺒﺎ ﺑﻄﻮر ﮐﺎﻣﻞ ﺑﺎ اﺳﺘﻔﺎده از ﺗﺮاﻧﺰﯾﺴﺘﻮر ﻃﺮاﺣﯽ ﻧﻤﻮد ﮐﻪ اﯾﻦ اﻣﺮ ﺧﻮد ﻣﻮﺟﺐ ﺳﺎزﮔﺎري ﺑﯿﺸﺘﺮ ﻣﺪارﻫﺎي ﻣﺪ ﺟﺮﯾﺎن ﺑﺎ ﭘﺮدازش دﯾﺠﯿﺘﺎل ﻣﯽ ﮔﺮدد. دﺳﺘﻪ اي از اﯾﻦ ﻣﺪارﻫﺎي ﻣﺪ ﺟﺮﯾﺎن، ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻫﺎي ﻓﯿﺪﺑﮏ ﺟﺮﯾﺎن ﻣﯽ ﺑﺎﺷﻨﺪ. ﻋﻼﻗ رو ﺑﻪ رﺷﺪ در ﺳﻨﺘﺰ ﻣﺪارﻫﺎي ﺟﺮﯾﺎن ﺣﺎﻟﺖ ﻋﻤﺪﺗﺎ ﺑﻪ ﻋﻠﺖ ﻣﺰاﯾﺎي ﺑﺎﻟﻘﻮه ﺧﻮد را از ﻗﺒﯿﻞ وﻟﺘﺎژ ﭘﺎﯾﯿﻦ ﺗﺮ و ﻣﺼﺮف اﻧﺮژي ﻃﯿﻒ ﺳﯿﻊ ﺗﺮ، ﭘﻮﯾﺎﯾﯽ ذاﺗﯽ ﭘﻬﻨﺎي ﺑﺎﻧﺪ وﺳﯿﻊ ﺗﺮ، ﻣﺪارات ﺳﺎده ﺗﺮ، ﻣﺪارات ﻏﯿﺮ ﺧﻄﯽ ﮐﻮﭼﮑﺘﺮ و ﻧﯿﺰ ﭘﯿﭽﯿﺪﮔﯽ ﮐﻤﺘﺮ ﮐﻪ در ﻣﯿﺎن ﻋﻼﻗﻪ ﻣﻨﺪان اﯾﻦ ﮔﻮﻧﻪ ﻣﺪارات ﻓﺮاﻫﻢ ﮐﺮده اﺳﺖ. ﺑﻄﻮر ﺧﺎص ﻣﯽ ﺗﻮان ﮔﻔﺖ، ﻧﯿﺎز ﺑﻪ ﺳﺮﻋﺖ ﺑﺎﻻ و ﭘﻬﻨﺎي ﺑﺎﻧﺪ ﻋﺮﯾﺾ ﻣﻮﺗﻮر ﻣﺤﺮك ﭘﯿﺸﺮﻓﺖ ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻫﺎي ﻓﯿﺪﺑﮏ ﺟﺮﯾﺎن ﺑﻮده اﺳﺖ. ﻣﺰﯾﺖ اﺻﻠﯽ اﯾﻦ ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻧﺴﺒﺖ ﺑﻪ ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻫﺎي ولتاژي علاوه بر نرخ چرخش مناسب، پهناي باند وسيع و تقريبا مستقل از بهره حلقه بسته آن مي باشد. اين تقويت كننده ساختاري متفاوت از تقويت كننده هاي عملياتي ولتاژي دارد كه سبب مي شود در بسياري از كاربردها مخصوصا كاربردهايي با ﺑﻬﺮه ﺣﻠﻘﻪ ﺑﺴﺘﻪ ﮐﻢ و ﺷﺮاﯾﻂ ﺳﯿﮕﻨﺎل ﺑﺰرگ ﺑﺮ ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻫﺎي ﻣﺘﺪاول وﻟﺘﺎژي ﺑﺮﺗﺮي داﺷﺘﻪ ﺑﺎﺷﺪ. در اﯾﻦ ﻣﻘﺎﻟﻪ، ﺿﻤﻦ ﻣﻌﺮﻓﯽ و ﺑﺮرﺳﯽ ﺳﺎﺧﺘﺎري، ﻃﺮاﺣﯽ و ﺷﺒﯿﻪ ﺳﺎزي ﯾﮏ ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻓﯿﺪﺑﮏ ﺟﺮﯾﺎن ﺑﺎ اﺳﺘﻔﺎده از ﭘﺎراﻣﺘﺮﻫﺎي ﺗﮑﻨﻮﻟﻮژي μm 0/35 CMOS اراﺋﻪ ﮔﺮﯾﺪه اﺳﺖ. ﻫﺴﺘﻪ اﺻﻠﯽ اﯾﻦ ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻣﺪار ﭼﻬﺎرﮔﺎﻧﻪ ﺗﻔﺎﺿﻠﯽ ﮐﻼس AB ﻣﯽ ﺑﺎﺷﺪ. ﭼﻬﺎرﮔﺎﻧﻪ ﺗﻔﺎﺿﻠﯽ در واﻗﻊ ﺗﺮﮐﯿﺒﯽ از ﻣﺪار ﺗﻔﺎﺿﻠﯽ ﻣﻌﻤﻮﻟﯽ و ﻣﺪار ﺗﻔﺎﺿﻠﯽ ﺿﺮﺑﺪرﯾﺴﺖ. ﺑﻄﻮرﯾﮑﻪ در ﺣﻮاﻟﯽ ﻧﻘﻄﻪ ﺗﻌﺎدل داراي ﺧﺼﻮﺻﯿﺎت ﻣﺸﺎﺑ ﻣﺪار ﺗﻔﺎﺿﻠﯽ ﻣﻌﻤﻮﻟﯽ ﻣﯽ ﺑﺎﺷﺪ و در ﻧﺎﺣﯿﻪ ﻋﺪم ﺗﻌﺎدل ﮐﻪ ﯾﮏ زوج از ﺗﺮاﻧﺰﯾﺴﺘﻮرﻫﺎي ﺿﺮﺑﺪري روﺷﻦ و زوج دﯾﮕﺮ ﺧﺎﻣﻮش اﺳﺖ، ﺎﻧﻨﺪ ﻣﺪار ﺗﻔﺎﺿﻠﯽ ﺿﺮﺑﺪري ﺑﻪ ﮐﺎر ﺧﻮد اداﻣﻪ ﻣﯽ دﻫﺪ. ﻣﺪار ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻓﯿﺪﺑﮏ ﺟﺮﯾﺎن ﻣﻌﺮﻓﯽ ﺷﺪه ﺑﺎ اﺳﺘﻔﺎده از ﻣﻨﺎﺑﻊ 1/65± وﻟﺖ ﺗﻐﺬﯾﻪ ﻣﯽ ﺷﻮد. اﯾﻦ ﻣﺪار ﻧﺮخ ﭼﺮﺧﺸﯽ در ﺣﺪود 100μV/s و ﭘﻬﻨﺎي ﺑﺎﻧﺪ ﺣﻠﻘﻪ ﺑﺴﺘﻪ ﺛﺎﺑﺘﯽ در ﺣﺪود 30 ﻣﮕﺎﻫﺮﺗﺰ را ارائه مي دهد.

Analog design has long been based on the voltage signal processing. The inherent advantages of wide bandwidth, high rotation rate, low power consumption, simple circuit and a current gain of the features that today are considered. No need for this type of passive circuits using high-voltage and high-precision elements has made it possible They can be used almost entirely by using transistor design, which results in greater compatibility with current mode circuits are digital processing Set the current mode circuits, current feedback amplifiers are. interested these circuits is provided. Growing interest in the synthesis of the current circuits, mainly because of its potential benefits such as lower voltage and power consumption broader range, The internal dynamics of the wider bandwidth, circuit simpler, smaller and less complex nonlinear circuits among enthusiasts of these circuits is provided. In particular, it can be said, the need for high speed and wide bandwidth current feedback amplifier has been the engine of progress. The main advantage of this amplifier to boost the voltage in addition to the proper rotation rate, wide bandwidth and it is almost independent of the closed-loop gain. This amplifier has a structure different from that cause voltage operational amplifiers in many applications, especially for applications with low closed loop gain and the large signal voltage is superior to conventional amplifiers. In this thesis, we introduce and study the structure, design and simulation of a current feedback amplifier using technology parameters0/ 35 μm CMOSurinary offer. Class AB amplifier circuit differential quad core is. The combination of ordinary differential and differential-four circuit multiplications differential circuit. Current feedback amplifier circuit is presented using the resources1 / 65± v nutrition. This circuit rotation rate about100 V /μ s and closed-loop bandwidth of 30 MHz fixed offers.