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AssigneeAlcatel
InventorPatrick August Maria Wouters
Estimating the term…
A method for controlling the quiescent output current of an operational amplifier arrangement (OAA) by means of tuning offset voltages of a stage (A2,A3) preceding a differential output driver stage (OS), further includes a step of selecting the cut-off frequency of the filter formed by the input capacitors of said differential output driver stage (OS) and the output impedance of said stage (A2,A3) preceding said differential output driver stage (OS), such that said cut-off frequency is lower than a predetermined part of the maximum bandwidth of the input signal (vin) applied to said operational amplifier arrangement (OAA), and whereby said stage (A2,A3) preceding said differential output driver stage (OS) is designed such as to be limited in output swing. The invention relates as well to an operational amplifier designed in accordance with the subject methodology.
Method for controlling the quiescent output current of an operational amplifier arrangement (OAA), said method including the steps of tuning respective input offset voltages of a stage (A2,A3) preceding a differential output driver stage (OS),
Operational amplifier arrangement (OAA) including a differential output stage (OS), input terminals of which are coupled to respective output terminals of a stage (A2,A3) preceding said differential output stage (A2,A3), said operational amplifier arrangement (OAA) further including a quiescent current control circuit (QCCC) adapted to control the quiescent current of said differential output driver stage (OS) by tuning respective input offset voltages (VoffA2, VoffA3) of said stage preceding said differential output stage (OS)
Dependencies are inferred from the claim text.