Patent ID: 7742044

Claim:
An source-follower type analogue buffer, comprising: a storage capacitor, wherein a first terminal of the storage capacitor is connected to an operation voltage source through a first switch (S 1 ), a second terminal of the storage capacitor is connected to an input voltage (Vin) source through a third switch (S 3 ); a driving transistor, wherein a gate terminal of the driving transistor is connected to the first terminal of the storage capacitor, a drain terminal of the driving transistor is connected to the operation voltage source, and a source terminal of the driving transistor is connected to the second terminal of the storage capacitor through a second switch (S 2 ); and an active load, wherein a first terminal of the active load is connected to the source terminal of the driving transistor and an output terminal of the source-follower type analogue buffer through a fourth switch (S 4 ), and a second terminal of the active load is connected to the ground, the active load is controlled by a bias voltage, wherein the input voltage source is connected to the output terminal of the source-follower type analogue buffer through a fifth switch (S 5 ).