I have this oscillator design and it says it operating at weak inversion region. How do you do that?
I thought Vgs controls everything whether something in saturation, triode or weak inversion but the block diagram doesn't show Vgs how it could make the device in weak inversion region as opposed to other mode like saturation or triode.
Re: How do you make the cirucit operating in weak inversion region?
Same as any other ring oscillator, only slower and lower
power. "How low can you go?" is a thing, in the present
IoT frenzy, that attracts wheel-reinventing research.
... Vgs controls everything whether something in saturation, triode or weak inversion but the block diagram doesn't show Vgs how it could make the device in weak inversion region as opposed to other mode like saturation or triode.
The other way round: weak inversion (or subthreshold) is an operation mode, saturation or triode are operation regions. In weak inversionmode you can still have transistors operating in saturation or in triode (or in off) region.
For oscillator circuits, where you have transistors switching between saturation and offregion, the way how to operate them in weak inversionmode is indicated in dick freebird's post above: