Operational amplifier arrangement including a quiescent current control circuit
First Claim
1. 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).
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Accused Products
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.
66 Citations
10 Claims
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1. 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).
Specification