Lecture%2031_April%2015%202011

Lecture%2031_April%2015%202011 - Chapter 15 Differential...

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Click to edit Master subtitle style Jaeger/Blalock 7/28/10 Microelectronic Circuit Design, 4E McGraw-Hill 131 -1 Chapter 15 Differential Amplifiers and Operational Lecture 31 Cover Section: 15.1
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Jaeger/Blalock 7/28/10 Microelectronic Circuit Design, 4E McGraw-Hill 231 -2 Differential Amplifiers Each circuit has two inputs. Difference of the two inputs is the differential input. Differential-mode output voltage is the voltage difference between collectors, drains of the two transistors. Ground referenced outputs can also be taken from collector/drain. Ideal differential amplifier uses perfectly matched transistors.
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Jaeger/Blalock 7/28/10 Microelectronic Circuit Design, 4E McGraw-Hill 331 -3 Bipolar Differential Amplifiers: DC Analysis Both inputs are set to zero, emitters are connected together. If transistors are matched, Terminal currents are also equal.
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Jaeger/Blalock 7/28/10 Microelectronic Circuit Design, 4E McGraw-Hill 431 -4 Bipolar Differential Amplifiers: DC Analysis (Example) Problem: Find Q-points of transistors in the differential amplifier. Given data: VCC = VEE =15 V, REE = RC =75k , β F =100 Analysis: Due to symmetry, both transistors are biased at Q- point (94.4 μ A, 8.62V)
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Jaeger/Blalock 7/28/10 Microelectronic Circuit Design, 4E McGraw-Hill 531 -5 Bipolar Differential Amplifiers: AC
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Lecture%2031_April%2015%202011 - Chapter 15 Differential...

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