LM4766: Is my amplifier circuit correctly configured, please?

Christopher James

Intellectual 880 points

Part Number: LM4766

kai klaas69 very kindly provided me with data and analysis regarding the LM4766 Amplifier section of my circuit.

e2e.ti.com/.../877048

Now that I have modelled the circuit with components, is it possible that it could be thoroughly checked, please?

As well as my circuit I will attach the relevant information from the product pdf.

Thank you so very much.

Christopher J James

Thank yiou, so very much.

CJJ

over 4 years ago

0 Yanming Gong over 4 years ago

TI__Mastermind 19410 points

Hi James,

What's the VEE power value? I found the Cm cap voltage is 6.3V. Please take care if the cap voltage is suitable.

Others is fine.

Regards,

Derek

0 Christopher James over 4 years ago in reply to Yanming Gong

Intellectual 880 points

Dear Derek,

On further reflection, I must confess I hadn't noticed that had slipped my attention.

I have duly amended the original circuit and list of components as above.

Is the rest of the circuit in order though, please?

Thank you so very much.

Christopher

0 Yanming Gong over 4 years ago in reply to Christopher James

TI__Mastermind 19410 points

Hi Christopher,

Can you tell me the VCC and VEE power value?

From the design, I think fine, but I need to double confirm the power supply.

Regards,

Derek

0 Christopher James over 4 years ago in reply to Yanming Gong

Intellectual 880 points

Dear Derek,

+15 Volts and -15 Volts plus a Ground.

Part of the circuit only requires a single supply but other parts yield better results with a parallel supply.

Thank you so much.

Christopher

0 Yanming Gong over 4 years ago in reply to Christopher James

TI__Mastermind 19410 points

Dear Christopher,

Thank you.

I suggest add 1uF and 0.1uF decoupling caps on VCC.

Others is fine.

Regards,

Derek

0 Christopher James over 4 years ago in reply to Yanming Gong

Intellectual 880 points

Dear Derek,

I thought that Cs was adding a 0.1uF, and I have added a further 1uF as a duplicate CIN as per the amended image above.

If you are able to check that this is what you kindly advised, I would be most sincerely grateful.

I have done a similar thing on another part of my circuit, but it had not triggered me to repeat it elsewhere,

Thank you once again for your kind guidance.

Christopher

0 Christopher James over 4 years ago in reply to Christopher James

Intellectual 880 points

Dear Derek,

I will ask no more of you, for I have been advised that my comments were offensive.

I promise on my life that they were not intended to be.

Thank you.

Christopher

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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LM4766: Is my amplifier circuit correctly configured, please?