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A diode detector is used to detect an amplitude modulated wave of `60%` modulation by using a condense of capacity `250` picofarad in parallel with a load resistance `100` kilo ohm find the maximum modulated which could be find the maximum modulated frequency which could be detected by itA. `10.32 Mhz`B. `10.61 kHz`C. `5.31 MHz`D. 5.31 kHz |
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Answer» Correct Answer - B `therefore tau=RC = 100 xx 10^(3) xx 250 xx 10^(-12)`s `=2.5 xx 10^(7) xx 10^(-12) s=2.5 xx 10^(-6)`s The higher frequency which can be detected with tolerable distortion is `f=1/(2pim_(a)RC)= 1/(2pixx0.6xx2.5xx10^(-6))`Hz `=(100 xx 10^(4))/(25 xx 12pi)`Hz `=(4/12pi xx 10^(4)` Hz = 10.61 kHz |
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