Question

An AM signal having a carrier frequency of 460 kHz is to be mixed with a local oscillator signal at a frequency of 1135 kHz. What does the output of the IF amplifier consist of

Answer 1

the output of the IF amplifier consist of 675 kHz

Step-by-step explanation:

Given the data in the question;

AM signal carrier frequency
`_{RF` = 460 kHz

Local oscillator frequency
`_{lo` = 1135 kHz

Now, The output of the IF amplifier consists of difference of local oscillator frequency & AM carrier signal frequency;

FREQUECY
`_{IF` = FREQUECY
`_{lo` - FREQUECY
`_{RF`

so we substitute in our given values

FREQUECY
`_{IF` = 1135 kHz - 460 kHz

FREQUECY
`_{IF` = 675 kHz

Therefore, the output of the IF amplifier consist of 675 kHz