Analog MOS subcircuit

乱世煮酒论天下

Analog MOS subcircuit [Copy link]

1. MOS as a switch

For N tubes, the drain or source terminal depends on the potential, and the on-resistance mainly depends on the channel resistance. In the on-state of the switch, the channel resistance is very small, and in the off-state of the switch, the channel resistance is very large. Therefore, the gate voltage Vgs is very large, and the MOS tube works in the non-saturated region.

Applied in the following level conversion circuits:

xyxlyfswbl

Sorry that my reply is meaningless. I just want to get points and then use the points to get learning materials to learn electronics.

乱世煮酒论天下

xyxlyfswbl posted on 2024-8-18 19:20 I'm sorry that my reply is meaningless, it's just for the points, and then use the points to get learning materials to learn electronics

Come on, let’s study together

乱世煮酒论天下

MOS diode/active resistor

1. When the gate and drain of the MOS tube are connected together, the IV characteristic is essentially similar to a PN junction diode, so it is called a MOS diode. The MOS diode is used as a current mirror element and level conversion;

The gate is connected to the drain to ensure that the MOS tube works in the saturation region. At this time, the channel transconductance becomes the channel conductance. The MOS diode is equivalent to a current source and a small signal resistor. The channel resistance is approximately 1/gm