A low-voltage current mirror circuit is provided. The low-voltage current
mirror circuit includes a current mirror including first and second
transistors, a buffer circuit, and a third transistor. The first
transistor is the input transistor to the low-voltage current mirror
circuit. Additionally, the source of the third transistor is coupled to
the drain of the first transistor. The buffer circuit is configured to
cause the voltage at the gate of the third transistor and the voltage at
the gage of the first transistor to be substantially equal. Also, the
low-voltage current mirror circuit is arranged such that the drain
current provided to the third transistor is relatively small such that
the Vgs of the third transistor is roughly equal to the threshold voltage
V.sub.TH. Accordingly, the input voltage of the low-voltage current
mirror circuit is approximately equal to Vgs-V.sub.TH.