Patent ID: 7417495

Claim:
A switchable tranconductance (G m ) circuit module comprising: a first G m circuit coupled between an output node and an input node; and a second G m circuit coupled in parallel to the first G m circuit, each G m circuit comprising: a first and second positive channel metal oxide semiconductors (PMOS), a drain of the first PMOS coupled to a source of the second PMOS; a first and second negative channel metal oxide semiconductors (NMOS), a drain of the first NMOS is coupled to a source of the second NMOS, a drain of the second NMOS is coupled to a drain of the second PMOS, wherein a G m value across the output and input nodes is adjustable by selectively switching one or both of the G m circuits, wherein each G m circuit is switched off by deactivating the first PMOS and the first NMOS.