Re: 哪位大哥做过Delta-Sigma AD Converter呀？# EE - 电子工程
f*u
1 楼
The point is how do you calculate the snr? because it is tricky. it is signal
and noise.
uaually ppl forcus on the int1 noise which comes from two sides: switch noise
and opamp noise.
switch noise is kt/c, so big cap helps.
opamp noise you can run hspice and later refer all them back to your input
side.
also noise and distortion are two different issues. good settling help
distortion. big dc gain at int1 help its distortion, also help to attenuate
int2, int3 etc noise and distortion (that is the
and noise.
uaually ppl forcus on the int1 noise which comes from two sides: switch noise
and opamp noise.
switch noise is kt/c, so big cap helps.
opamp noise you can run hspice and later refer all them back to your input
side.
also noise and distortion are two different issues. good settling help
distortion. big dc gain at int1 help its distortion, also help to attenuate
int2, int3 etc noise and distortion (that is the