Current mirror circuits with field effect transistor feedback

A current mirror circuit for providing an output current having the same magnitude as a drive current, including in combination:

• constant current supply means having an output terminal;
• variable current sink means having an input terminal and a control terminal, said input terminal being coupled to said output terminal of said constant current supply means, said control terminal being adapted to receive a drive signal which has a magnitude related to the magnitude of the drive current, and said variable current sink means providing a quiescent voltage having a substantially zero magnitude between said input and control terminals thereof;
• input current path means having an output terminal and a control terminal, said output terminal of said input current path means being coupled to said control terminal of said variable current sink means, and said control terminal of said input current path means being coupled to said input terminal of said variable current sink means;
• and
• output current path means having a control terminal and an output terminal, said control terminal of said output current path means being coupled to said input terminal of said variable current sink means, and said output terminal of said output current path means being adapted to provide the output current to an electrical load, said variable current sink means selectively sinking the control currents of said input and output current path means in response to said drive signal to enable the output current to have substantially the same magnitude as the drive current.