Buffer Amplifier Circuit

摘要

Amplifier circuits implemented with a buffer amplifier with a voltage gain substantially equal to one. In one example, a continuous-time amplifier is implemented by applying the input source across the input and the output terminals of the buffer amplifier. In another example, a discrete-time amplifier is implemented. During the sampling phase at least one input voltage is sampled, and during the transfer phase at least one capacitor is coupled across the input and the output terminals of a buffer amplifier to effectuate an amplification.

主权项

1. A discrete-time amplifier circuit operable in a sampling phase and an amplification phase, the amplifier circuit comprising:
a plurality of switches; a first and a second capacitor; and at least one buffer amplifier having an input terminal and an output terminal, wherein:
during the sampling phase, the plurality of switches are configured to couple a first input voltage to the first capacitor and a second input voltage to the second capacitor; andduring the amplification phase, the plurality of switches are configured to couple the first and the second capacitors across the input terminal and the output terminal of the buffer amplifier to amplify a weighted sum of the first and the second input voltages.