| 摘要 |
<p>A single-ended to differential buffer circuit is (21,22) is disclosed, adapted to couple at least an input analog signal (Vin) to a receiving circuit (24). The buffer circuit (21,22) comprises an output section (22) comprising a differential amplifier (25) having a first (31) and a second (32) input, a first (41) and a second (42) output. The buffer circuit further comprises an input section (21) comprising a first (CS1) and a second (CS2) switched capacitor, each adapted to sample said input analog signal (Vin) and having a first side (p1',p2') and a second side (p1", p2"), the first sides (p1', p2') of the first and second switched capacitors being controllably connectable / disconnectable to/from said first (41) and second (42) outputs respectively. In the buffer circuit the second sides (p1",p2") of said first (CS1) and second (CS2) switched capacitors are controllably connectable/disconnectable to/from said first (31) and second (32) inputs of the differential amplifier (25) respectively. Moreover, in the buffer circuit the second sides (p1", p2") of the first and second switched capacitors (CS1,CS2) are controllably connectable/disconnectable to/from said second output (42) and said first output (41) respectively. A method (100) for coupling at least a single-ended input analog signal (V in ) to a receiving circuit (24) with differential inputs is also disclosed.</p> |
