Hi,

I need design a CMOS amplifier with low 1/f noise corner. Thermal noise doesn't matter.

Please give me guide or advise some books, papers.

Thanks
Yawei

Some auto-zeroing techniques suppress 1/f noise as well. In fact diffrences betweel auto-zero, correlated double sampling and chopper stabilizer are somewhat blurry, the concepts are quite similar.
Generally, consider yourself lucky if you manage to improve 1/f noise by a factor of 5 with these techniques.
Other than that use large area devices, avoid pocket implant mos, if you can. Some might recommend to avoid subthreshold devices, while some others might disagree.
There are also black magic techniques, like gated bias, but they are not in the model, so only silicon would tell how they are effective.

if you don't want to use any of the sampling techniques and just want to get the low 1/f noise by proper choosing of the devices and architecture, you should:
1. Use a classic two-stage amplifier given that it only contains 4 transistors contributing noise.
2. Use natural/un-implanted devices for your input pair. This helps because the implantation process adds damage to the silicon-oxide interface that creates trapping sites for the carriers in the channel.
3. Use buried channel devices for your input pair. 1/f is noise created at the silicon-oxide interface, buried channel devices have the carriers going below this interface therefore less carriers are trapped and released in Si-O interface and less 1/f noise results.
4. Increase the length of the active load devices in the first stage as much as you can and then sweep the length of the input pair devices as you plot input referred noise at a frequency. The curve will look like a bell and there is an optimum minimum point that you should choose.
5. Maximize the Vgst of your active load devices.
6. Operate you input pair devices in the sub-threshold region(low Vgst) to maximize their gm and minimize input referred voltage noise.

Do you have access to spectreRF? You could use pss/pnoise analyses to investigate the noise of a chopper-stabilized amplifier,
or pss/pac to look at the frequency response.

Regards,

Andrew.