NE612 beginner
 

I am very new in electronic circuits and I am using NE612 as a frequency mixer. In the datasheet a sample circuit for this purpose is shown. Nevertheless, it is for 45 MHz. There are some capacitors and inducers shown in the circuit diagram. However, I need to use some other frequencies as well. I was wondering if the values of capacitance and inductance which are shown in the datasheet should be changed for frequencies other than 45 MHz. I am not using it in radio applications, so I only need to have the IF produced in the output. I am really looking forward to hearing some help. If I have to change them, how should I measure them?
Thanks a lot for all helps
Best regards
Mohsen Erfanzadeh

NE612 beginner
 

On Thursday, March 15, 2012 3:21:58 PM UTC-4, Mohsenerfan wrote:
I am very new in electronic circuits and I am using NE612 as a frequency
mixer. In the datasheet a sample circuit for this purpose is shown.
Nevertheless, it is for 45 MHz. There are some capacitors and inducers
shown in the circuit diagram. However, I need to use some other
frequencies as well. I was wondering if the values of capacitance and
inductance which are shown in the datasheet should be changed for
frequencies other than 45 MHz. I am not using it in radio applications,
so I only need to have the IF produced in the output. I am really
looking forward to hearing some help. If I have to change them, how
should I measure them?
Thanks a lot for all helps
Best regards
Mohsen Erfanzadeh




--
Mohsenerfan

I suggest you refer to the application notes for the device. This will probably be your best source of information.

Jimmie

NE612 beginner
 

On 03/18/2012 04:53 AM, JIMMIE wrote:
On Thursday, March 15, 2012 3:21:58 PM UTC-4, Mohsenerfan wrote:
I am very new in electronic circuits and I am using NE612 as a frequency
mixer. In the datasheet a sample circuit for this purpose is shown.
Nevertheless, it is for 45 MHz. There are some capacitors and inducers
shown in the circuit diagram. However, I need to use some other
frequencies as well. I was wondering if the values of capacitance and
inductance which are shown in the datasheet should be changed for
frequencies other than 45 MHz. I am not using it in radio applications,
so I only need to have the IF produced in the output. I am really
looking forward to hearing some help. If I have to change them, how
should I measure them?
Thanks a lot for all helps
Best regards
Mohsen Erfanzadeh




--
Mohsenerfan

I suggest you refer to the application notes for the device. This will probably be your best source of information.

Jimmie

Resonance is when X [sub] L = X [sub] C

The Smith Chart leaps to mind as well.

Thanks a lot Jimmie, I am exactly trying to learn what I have to do with. I suppose I should learn more about LC filters and oscillator stabilizers. Am I right?
Thanks again.

NE612 beginner
 

1
F = --------------
2*PI*(L*C)

NE612 beginner
 

On 3-19-2012 22:56, Angelos Epithemiou wrote:
1
F = --------------
2*PI*(L*C)



Actually, it's the square root of (L*C) in the denominator of the above...