Unformatted text preview: Excellent selectivity 10. The _____ AM __ detector is used to develop a DC voltage that is proportional to the signal strength. 11. The AM diode detector is passive. What does this mean? The absence of gain 12. The IF frequency is 455 KHz. The filter capacitor is 0.02 uFd. What size resistor would be used in the detector circuit? 1.099 kohm 13. FM detection uses a discriminator. Why? The info is contained in the carriers frequency changes. It is the freq deviation of the carrier that must be decoded. 14. One of the simplest discriminator circuits is a __ slope _ detector. 15-18. Describe the operation of a phase-lock-loop (PLL) discriminator: The phase detector compares the phase of the FM input and the VCO output 19. The _ Lm1868 _ is an IC known as radio on a chip. 20. Describe the operation of a limiter: It limits the amplitude of the input signal to the output....
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- Spring '11
- Signal Processing, Ratio, LC circuit, Radio electronics