Category: SizingTool

The schematic of the constant-\(g_m\) bias circuit is shown in Fig. 1. It consists of two cross-coupled current mirrors, where one of the source contacts, e.g. of an NMOS transistor, is degenerated by a source resistor. This results in a unique operating point of the circuit other than zero current, which defines the pass current…

The purpose of a transistor for what it is invented for is to create gain. To do this it needs a large transconductance \(g_m\) and a small output conductance \(g_{ds}\). It would therefore be desirable to be able to adjust these small signal parameters \(g_m\) and \(g_{ds}\) independently of each other in the design of…