ece137a_lab3_2008

ece137a_lab3_2008 - ECE137a Lab project 3 You will first be...

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1 ECE137a Lab project 3 You will first be designing and building an op-amp. The op-amp will then be configured as a narrow-band amplifier for amplification of voice signals in a public address system . Part 1 You must first design and construct an op-amp using a mixture of MOSFETs and bipolar transistors. The class AB output transistors must be MOSFETs. The VN0104 / VP0104 are recommended for this. Design an operational amplifier to the following specifications: Differential gain: greater than 10,000 at 1 Hz. CMRR> 40 dB at 1 Hz Power supplies= ±5 V Must be able to drive ±2 Volts into RL=10 kOhm Differential input resistance > 20 kOhm. *For stability of the feedback loop, the differential gain must vary as 1 ) / 1 ( ) ( + = pole dc d j A j A ω , e.g. a single-pole rolloff with unity gain at pole dc unity unity A f π = = 2 . The unity-gain frequency unity f should be designed to be between 1 MHz and 2 MHz. This point will be discussed in the background section. Part 2 Z1 Z2 Vin Vout The circuit is then to be connected as so with impedances Z2 and Z1, both being RC networks. The network must be designed so that high MB low low in out f jf A f jf f jf V V / 1 / 1 / 1 / + + + = where % 2 10 ± = MB A % 10 Hz 400 ± = LOW f % 10 kHz 4 ± = High f Gains are to be tested at 1 kHz, 40 Hz, 400 Hz, 4 kHz, and 40 kHz to verify.
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This note was uploaded on 08/06/2008 for the course ECE 137AB taught by Professor Rodwell during the Winter '08 term at UCSB.

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ece137a_lab3_2008 - ECE137a Lab project 3 You will first be...

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