spectrallypure
Member level 3
Hi all! Does anybody know any reference dealing with how to properly layout the chopper switches in a chopped amplifier? I am talking about, for example, of the choppers S1-S4 in the figure below:
**broken link removed**
The de-facto analog layout book (Hastings) does not deal with this topic. I've read everywhere that the layout of these switches is critical, yet I haven't found any practical details/examples on how to actually do it... :\
Thanks in advance for any help!
Cheers,
Jorge.
PS. In case someone wonders, for my choppers I am using NMOS transistors (the common-mode voltage of the signals to chop is very close to ground!), and I am adding shorted dummies (of half the width) at the sides of each switch for reducing charge-injection errors So basically I would like to know how to actually layout all these guys together!
**broken link removed**
The de-facto analog layout book (Hastings) does not deal with this topic. I've read everywhere that the layout of these switches is critical, yet I haven't found any practical details/examples on how to actually do it... :\
Thanks in advance for any help!
Cheers,
Jorge.
PS. In case someone wonders, for my choppers I am using NMOS transistors (the common-mode voltage of the signals to chop is very close to ground!), and I am adding shorted dummies (of half the width) at the sides of each switch for reducing charge-injection errors So basically I would like to know how to actually layout all these guys together!