Differential amplifier arrangement
Assigneeaustriamicrosystems AG
InventorsPaolo D'Abramo, Riccardo Serventi
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Abstract
Circuitry for use in a differential amplifier includes an input stage having a first differential amplifier and an offset compensation stage that includes at least one controllable current source. The offset compensation stage is connected to a bias input of the first differential amplifier. The circuitry includes an output stage having a second differential amplifier, where the output stage is after an output of the input stage, and a programmable resistor network for controlling an amplification of the input stage. The programmable resistor network controls the amplification in accordance with a feedback from the first differential amplifier.
Claims16
Circuitry for use in a differential amplifier, comprising:
- an input stage comprising:
- a first differential amplifier;
- and
- an offset compensation stage comprising at least one controllable current source, the offset compensation stage being connected to a bias input of the first differential amplifier;
- an output stage comprising a second differential amplifier, the output stage being located after an output of the input stage;
- and
- a programmable resistor network for controlling an amplification of the input stage, the programmable resistor network controlling the amplification in accordance with a feedback from the first differential amplifier.
Dependencies are inferred from the claim text.