What degree of selectivity is desirable in the IF circuitry of a wideband FM phone receiver?

15 kHz.

You can use IF amplifier to adjust frequency selectivity when the desired frequency is difficult for tuning. This is partly done through the ability to reject radio frequencies that are undesired. The IF amplifier works from the ranges of 0.1 Hz to 1 kHz, and also from 10 MHz to 300 GHz.

See Wikipedia's article on Intermediate-frequency amplifier

Also, see the Analog site for the article on Tuned IF Amplifier Applications

And, see the Electronics Notes site for the article Superheterodyne Radio IF Amplifier & Filter

Please see the Encyclopedia2 thefreedictionary site for the article on intermediate-frequency amplifier

Last edited by markadlerdallas. Register to edit

Tags: none

Which one of these filters can be used in micro-miniature electronic circuits?

Receiver SAW IF filter.

From badwolf.j:

Surface Acoustic Wave

Intermediate Frequency

From the PC Mag site for the definition of the SAW IF filter.

"(Surface Acoustic Wave filter) A semiconductor device that is used to filter out desired frequencies. Widely used in mobile phones to filter both RF and IF frequencies, a SAW filter uses the piezoelectric effect to turn the input signal into vibrations that are turned back into electrical signals in the desired frequency range."

Please see the Data-Alliance site for the article SAW Filters for GPS Antennas

Also, see the Blog.Bliley site for the article The Ultimate Guide to SAW Filters

And, also see the Utmel site for the article SAW Filter: Introduction, Features and Applications

For more information, please see the ApiTech site for the pdf document Introduction to SAW Filter Theory & Design Techniques

Last edited by markadlerdallas. Register to edit

Tags: none

A receiver selectivity of 2.4 kHz in the IF circuitry is optimum for what type of signals?

SSB voice.

You can use IF amplifier to adjust frequency selectivity when the desired frequency is difficult for tuning.

This is partly done through the ability to reject radio frequencies that are undesired.

The IF amplifier works from the ranges of 0.1 Hz to 1 kHz, and also from 10 MHz to 300 GHz.

See Wikipedia's article on Intermediate-frequency amplifier

Also, see the Analog site for the article on Tuned IF Amplifier Applications

And, see the Electronics Notes site for the article Superheterodyne Radio IF Amplifier & Filter

Please see the Encyclopedia2 thefreedictionary site for the article on intermediate-frequency amplifier

Last edited by markadlerdallas. Register to edit

Tags: none

A receiver selectivity of 10 KHz in the IF circuitry is optimum for what type of signals?

Double-sideband AM.

You can use IF amplifier to adjust frequency selectivity when the desired frequency is difficult for tuning.

This is partly done through the ability to reject radio frequencies that are undesired.

The IF amplifier works from the ranges of 0.1 Hz to 1 kHz, and also from 10 MHz to 300 GHz.

See Wikipedia's article on Intermediate-frequency amplifier

Also, see the Analog site for the article on Tuned IF Amplifier Applications

And, see the Electronics Notes site for the article Superheterodyne Radio IF Amplifier & Filter

Please see the Encyclopedia2 thefreedictionary site for the article on intermediate-frequency amplifier

Last edited by markadlerdallas. Register to edit

Tags: none

What is an undesirable effect of using too wide a filter bandwidth in the IF section of a receiver?

Undesired signals will reach the audio stage.

You can use IF amplifier to adjust frequency selectivity when the desired frequency is difficult for tuning.

This is partly done through the ability to reject radio frequencies that are undesired.

The IF amplifier works from the ranges of 0.1 Hz to 1 kHz, and also from 10 MHz to 300 GHz.

See Wikipedia's article on Intermediate-frequency amplifier

Also, see the Analog site for the article on Tuned IF Amplifier Applications

And, see the Electronics Notes site for the article Superheterodyne Radio IF Amplifier & Filter

Please see the Encyclopedia2 thefreedictionary site for the article on intermediate-frequency amplifier

Last edited by markadlerdallas. Register to edit

Tags: none

How should the filter bandwidth of a receiver IF section compare with the bandwidth of a received signal?

Slightly greater than the received-signal bandwidth.

You can use IF amplifier to adjust frequency selectivity when the desired frequency is difficult for tuning.

This is partly done through the ability to reject radio frequencies that are undesired.

The IF amplifier works from the ranges of 0.1 Hz to 1 kHz, and also from 10 MHz to 300 GHz.

See Wikipedia's article on Intermediate-frequency amplifier

Also, see the Analog site for the article on Tuned IF Amplifier Applications

And, see the Electronics Notes site for the article Superheterodyne Radio IF Amplifier & Filter

Please see the Encyclopedia2 thefreedictionary site for the article on intermediate-frequency amplifier

Last edited by markadlerdallas. Register to edit

Tags: none