Explanation: In frequency scaling standard capacitors are chosen, because for non standard value of resistor, a potentiometer is used. 11. Find the difference in gain magnitude for a filter ,if it is the response obtained for frequencies f1=200Hz and f2=3kHz. Specification: AF=2 and fH=1kHz.
A. 4.28 dB
B. 5.85 dB
C. 1.56 dB
D. None of the mentioned
Answer:A
Explanation: In frequency scaling standard capacitors are chosen, because for non standard value of resistor, a potentiometer is used. 11. Find the difference in gain magnitude for a filter ,if it is the response obtained for frequencies f1=200Hz and f2=3kHz. Specification: AF=2 and fH=1kHz.
A. 4.28 dB B. 5.85 dB C. 1.56 dB D. None of the mentioned
Explanation: When f1=200Hz, VO(1)/Vin =AF/√ [1+(f/fH)2] =2/√ [1+(200/1kHz) 2] =2/1.0198.