Operational amplifier arrangement including a quiescent current control circuit
AssigneeAlcatel
InventorPatrick August Maria Wouters
Life of this patent
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Abstract
An operational amplifier arrangement (OAA) includes a differential output stage (OS), input terminals of which are coupled to respective output terminals of a preceding stage (A2, A3), said operational amplifier arrangement (OAA) further includes a quiescent current control circuit (QCCC) coupled between said output stage (OS) and said preceding stage (A2, A3) and adapted to control the quiescent current of said differential output stage (OS) by commonly and simultaneously tuning respective input offset voltages (VoffA2, VoffA3) of said preceding stage (A2, A3), is characterised in that said quiescent current control circuit (QCCC) is adapted to digitally and off-line tune said input offset voltages of said preceding stage.
Claims10
Operational amplifier arrangement (OAA) including a differential output stage (OS), input terminals of which are coupled to respective output terminals of a preceding stage (A2, A3), said operational amplifier arrangement (OAA) further including a quiescent current control circuit (QCCC) coupled between said output stage (OS) and said preceding stage (A2, A3) and adapted to control the quiescent current of said differential output stage (OS) by commonly and simultaneously tuning respective input offset voltages (VoffA2, VoffA3) of said preceding stage (A2, A3), characterised in that
- said quiescent current control circuit (QCCC) is adapted to digitally and off-line tune said respective input offset voltages (VoffA2, VoffA3) of said preceding stage (A2, A3).
Dependencies are inferred from the claim text.