circuit to detect 1.4 Mhz frequency

[harika17]

how design a circuit to detect 1.4 Mhz frequency?

 

[Les Jones]

You would need a band pass filter followed by a detector circuit. You will also need to get a more precise specification of the requirement from your teacher. You need to know the approximate amplitude of the signal and also how close to 1.4 Mhz it needs to be. For example if it has to reject signals only a few hz away fro 1.4 Mhz then it will be hard to design. If detecting signals from 1.3 to 1.5 Mhz is good enough then it will be much easier.

Les.

 

[JimB]

A radio receiver tuned to 1400 kHz would do the job.

Much more detail of the problem is needed before a detailed answer can be given.

As this is "Homework Help", not "Homework done for you", what Ideas do you have yourself?

JimB

 

[harika17]

I sholud design a mobile phone detecting circuit...My service prodr uses 1.4Mhz frequency...so how can i design that circuit....

 

[JimB]

...My service prodr uses 1.4Mhz frequency

Most unlikely, 1.4Mhz is in the medium wave broadcast band.

JimB