Untitled picture.png Machine generated alternative text:
(i) Estimate the bandwidth ofthe overall amplifier by calculating the upper 3dB frequency. 
[ Hint: First calculate the upper 3dB of the open loop amplifier, then apply feedback 
theory] 
[15marks] 
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Machine generated alternative text:
Question Il (30%) 
A monostable multivibrator circuit is shown in fig. 2(a). The circuit can be triggered by 
applying a narrow positive input pulse of height greater than Vref. For normal operation, 
CR. The saturation voltages of the op-amp are VL and —VL 
VB 
OH 
Trigger 
RI 
ref 
c 
Fig. 2(a): Monostable multivibrator

 

Machine generated alternative text:
In stable state, what are the values ofVo, VA, and VB? 
[8 marks]










Machine generated alternative text:
11. 
Show the resulting waveforms of Vo and VA after triggered. 
[10 marks]
Ink Drawings
Ink Drawings














 

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