Fully differential advantage?

[boki]

Hi, All:

What is the advantages in fully differential opamp that compare to
single-ended archtecture?

1. charge injection
2. clock-feedthrough

and why they will be reduced in fully differential?

Thanks a lot!

Boki.

 

[John Fields]

On 2 Oct 2003 21:31:10 -0700, bokiteam@ms21.hinet.net (boki) wrote:

Hi, All:

What is the advantages in fully differential opamp that compare to
single-ended archtecture?

1. charge injection
2. clock-feedthrough

and why they will be reduced in fully differential?

---
In a fully differential opamp only the _differences_ between the input
signals will appear on the output, with the result that extraneous
signals with the same polarity and amplitude appearing on both inputs
simultaneously will be rejected and will not affect the output.

--
John Fields