Patent ID: 7119605

Claim:
A circuit to increase the transconductance of a current mirror in case of small input currents of the current mirror without affecting the transconductance of said current mirror in case of large input currents is comprising: a PMOS current mirror comprising an input transistor and an output transistor, wherein the sources of said both transistors are connected to VDD voltage, the drain of the input transistor is connected to the input of the current mirror, the drain of the output transistor is connected to the output of the current mirror, the gates of said both transistors are interconnected, and the gate and the drain of said input transistor are interconnected; and a bypass of said input transistor of said current mirror comprising a resistor and a PMOS transistor, wherein one terminal of said resistor is connected to VDD voltage, the other terminal of the resistor is connected to the source of said PMOS transistor, the gate of said PMOS transistor is connected to the drain of said PMOS transistor and to the drain of said input transistor of said current mirror.