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CSMC0.6μm CMOS Rail- to - Rail operational amplifier chip design research

Author: MaYunFei
Tutor: ZhangZhiYong
School: Northwestern University
Course: Microelectronics and Solid State Electronics
Keywords: Analog IC Design Operational amplifier Bandgap reference Layout ESD protection
CLC: TN722.77
Type: Master's thesis
Year: 2010
Downloads: 229
Quote: 1
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Abstract


In recent years, low - voltage design techniques in integrated circuit design by the people more and more attention . Operational amplifier (op amp ) as a generic , the important integrated unit circuit , low voltage design has important reference value and the actual value . However, as the supply voltage decreases , the influence of the threshold voltage of the input and output dynamic range of the op amp will continue to decrease , which would seriously affect the normal work of the post-stage circuit . In order to improve the dynamic range of the input and output of the op amp , Rail - to -Rail op amp design has become a research focus . This article first op amp circuit analysis and design . Input stage based feedforward compensation circuit structure constant transconductance Rail- to -Rail input bias circuit wide swing cascode current leakage , floating current source output stage feedforward control class AB output stage , the compensation circuit improved Miller compensation capacitor . The op amp design a curvature compensation based on the current mode bandgap reference voltage source , the test results show that , in the temperature range of -55-125 ℃ has a low temperature coefficient of the bandgap reference only 7.69ppm / ℃. Second, the standard on Technology CSMC 0.6μm CMOS process parameters , the DC characteristics of the overall circuit , transient characteristics and AC characteristics simulation and analysis . Simulation results show that the op amp to achieve Rail - to -Rail Input and output requirements , static power 1.079mW, open-loop gain 123.5dB unit bandwidth product of 10.6MHz, phase margin degrees to 54.8 ° . Finally , according to layout the basic theory , based on CSMC 0.6μm process , analyze the specific requirements of the circuit design of the single components in the circuit . At the same time , based on the full-chip ESD protection architecture , design based FOD detection of ESD discharge circuit and the ESD protection device based on SCR technology . Finally, the overall layout of the op amp design , design rule checking and layout and schematic consistency check , verify the reasonableness of the layout .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Amplification technology,the amplifier > Amplifier > Amplifiers: the role of sub- > Op amps (calculated amplifier)
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