Switchable MOS current mirror

A switchable current mirror circuit comprising:

• an input current branch;
• an output current branch arranged in parallel relation to said input current branch;
• a plurality of first field-effect transistors disposed in said input current branch;
• a plurality of second field-effect transistors disposed in said output current branch;
• each of said field-effect transistors including spaced drain and source electrodes defining a drain-source path and a gate electrode overlying the drain and source electrodes;
• the drain-source paths of the first field-effect transistors disposed in said input current branch being connected in series;
• the drain-source paths of the second field-effect transistors disposed in said input current branch being connected in series;
• each of the gate electrodes of said first field-effect transistors being connected to a drain electrode thereof and to a corresponding gate electrode of a respective second field-effect transistors;
• a circuit section including
• a third and a fourth field-effect transistor, each of said third and said fourth field-effect transistors having spaced drain and source electrodes defining a drain-source path and a gate electrode overlying the drain and source electrodes;
• an operating voltage terminal,
• a control terminal,
• one of said source electrode and said gate electrode of said third field-effect transistor being connected to said operating voltage terminal, and
• the gate electrode of said fourth field-effect transistor being connected to said control terminal,
• the drain-source paths of said third and fourth field-effect transistors being connected to each other and connecting the input current branch and the output current branch together;
• and
• a plurality of charge storage capacitors corresponding in number to the plurality of first field-effect transistors, each of said capacitors being respectively connected to the gate electrode of the first field-effect transistor corresponding thereto.