拉扎维模拟CMOS集成电路设计

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Fig. 1.2 Attentuation(衰减) and Distortion (失真) of data through a lossy cable
Introduction to Analog Design
Why analog? (4)
Fig. 1.3 Multi-level signaling to reduce the bandwidth
Introduction to Analog Design
Level of abstraction
Fig. 1.8 Abstraction levels in circuit design
数模混合IC设计实例(1)
➢ 植入生物体的微电子电路在临床上已广泛应用于心率调节、人 工耳蜗、人工视网膜修复、泌尿控制与功能性神经-肌肉电刺激、 以及癫痫和脊柱损伤等康复医疗中。
Introduction to Analog Design
Why analog? (8)
Since the electrical current converted by a photodiode is very small, the receiver after the photodiode must process a low-level signal at a very high speed, which requires a low noise, broadband circuit design.
Fig. 1.1b Addition of amplification and filtering for higher sensitivity (灵敏度)
Introduction to Analog Design
Why analog? (3) 2. Digital communications
A digital signal through a long cable will be attentuated and distorted. Multi-level signal processing maybe needed to reduce the required transmission bandwidth (传输带宽) Need a DAC in the transmitter to produce multiple levels from the grouped binary data and an ADC in the receiver to determine which level has been transmitted.
Fig. 1.7 Differential accelerometer used in the ABS (安全气囊) system of a car.
Introduction to Analog Design
Why CMOS (1)?
CMOS is widely used in digital circuit design due to its low power and low fabrication cost. In the old age, bipolar is often used in the analog circuit design because the speed of the CMOS is not high enough. After scaling down again and again, the speed of CMOS is greatly increased. Nowadays, it is comparable with BIP.
Introduction to Analog Design
Why analog? (5) 3. Disk Drive Electronics
The signal received from the magnetic head is really weak and the noise is quite high. Just like Fig. 1.1b, there needs amplification, filtering and ADC for further processing.
采用硅微机械加工技术的植入式记录电极及其在大鼠体内的记录结果
数模混合IC设计实例(2)
2. 体内至体外无线数据传送通路
神经信号记录电极
1. 体外至体内的无线能 量及控制数据传送通路
无线植入式神经信号采集系统
数模混合IC设计实例(3)
➢新型8通道低噪声神经信号前端放大芯片
Fig. 1.6 Optical fiber system
Introduction to Analog Design
Why analog? (9) 5. Smart sensors
When the car hits an obstacle, the drop in the speed is measured as acceleration. If this acceleration exceeds a certain threshold, the air bag will be released. Since the change of the capacitance is quite small, the electrical signal received is very weak and the there exist large interference, hence the amplification, filtering and ADC are needed to handle these small signals properly.
Introduction of this course
Text book(英文版教材):
1、Behzad Razavi, 模拟CMOS集成电路、模拟CMOS集成电路设计 作者:毕查德·拉扎维,译:陈贵灿、程军、 张瑞智 出版社:西安交通大学出版社 ,2003。
Fig. 1.4 Data stored in and received from a hard disk
Introduction to Analog Design
Why analog? (6) 3. Wireless Receivers
A radio-frequency (RF,射频) signal received by a cell phone (手 机)is usually only a few microvolts and its center frequency is usually 1Ghz or higher, while the value of the interferers are higher. Therefore, a high frequency of amplifier and filter are needed.
Fig. 1.5 Signal and interferers received by the antenna of a wireless receiver.
Introduction to Analog Design
Why analog? (7)
4. Optical Receivers
High frequency signals are not suitable for transmitting over long distance in the traditional cable due to the severe interference and considerable attenuation because of the limited bandwidth of the cable. In this case, the electrical high frequency signals are converted into the optical signals first by the laser diode, then these optic signals are transmitted by an optical fiber, which has extremely wide band and very low loss. In the other end, the optical signals are converted into electrical signals again by the photodiode.
Natural signals are analog, while many signals we used are digital So we need ADC to convert an analog signal to digital signal and then use DSP to process the digital signal.
Fig. 1.1a Digitization of a natural signals
Introduction to Analog Design
Why analog? (2) 1. Processing of Natural Signals
Well some times, the natural signals are very small, or there exist many interferers (干扰). In this case, the small signal cannot be converted directly into digital correctly. Therefore, an amplifier (放大器)and a filter (滤波器)are needed before converting.
Introduction of this course
Course Name: Analysis and Design of Analog Integrated Circuits
Lecturer: Dr. Wu Zhaohui, School of Electronic and Information Engineering , SCUT , phzhwu@, 13902215012
Main reference book(参考书): 1、CMOS模拟集成电路设计(第二版) 作者:phillip E. Allen, Douglas R. Holberg 译:冯军、李智群 出版社:电子工业出版社,2005。
Introduction to Analog Design
Why analog? (1) 1. Processing of Natural Signals
Introduction to Analog Design
Why CMOS (2)?
Combining with other advantages, it is time for CMOS to replace bipolar in the analog IC design. The most important force to apply CMOS technology to analog design is the possibility of placing both analog and digital circuits on the same chip so as to improve the overall performance and reduce the cost of packaging. This is often called as mixed IC design, which is very hot in IC design nowadays.
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