Single-ended to differential buffer circuit and method for coupling at least a single-ended input analog signal to a receiving circuit with differential inputs

摘要

A single-ended to differential buffer circuit is disclosed, adapted to couple at least an input analog signal to a receiving circuit. The buffer circuit comprises an output section comprising a differential amplifier having a first and a second input, a first and a second output. The buffer circuit further comprises an input section comprising a first and a second switched capacitor, each adapted to sample said input analog signal and having a first side and a second side, the first sides of the first and second switched capacitors being controllably connectable/disconnectable to/from said first and second outputs respectively. In the buffer circuit the second sides of said first and second switched capacitors are controllably connectable/disconnectable to/from said first and second inputs of the differential amplifier respectively. Moreover, in the buffer circuit the second sides of the first and second switched capacitors are controllably connectable/disconnectable to/from said second output and said first output respectively. A method for coupling at least a single-ended input analog signal to a receiving circuit with differential inputs is also disclosed.

主权项

1. A single-ended to differential buffer circuit, for coupling at least an input analog signal to a receiving circuit, the circuit comprising:
an output section comprising a differential amplifier having a first and a second input, a first and a second output; and an input section comprising a first and a second switched capacitor, each adapted to sample said input analog signal and having a first side and a second side, the first sides of the first and second switched capacitors being controllably connectable/disconnectable to/from said first and second outputs respectively, wherein:
the second sides of the first and second switched capacitors are controllably connectable/disconnectable to/from the first and second inputs of the differential amplifier respectively;the second sides of the first and second switched capacitors are controllably connectable/disconnectable to/from said second output and said first output respectively.