Patent ID: 6366165
Filing Date: 2002-04-02
Classification: H03F

Abstract:
An amplifier comprising:an input stage (IPST) having a pair of inputs (INN,INI) for receiving a differential input signal (Vin) and a pair of outputs (CQ6,CQ7) for delivering a differential intermediate signal in response to the differential input signal (Vin); an intermediate stage (INTST) for converting the differential intermediate signal to a non-differential intermediate signal, which intermediate stage (INTST) comprises a current mirror (Q5,R5,Q4,R4) having an input branch (Q5,R5) and an output branch (Q4,R4) for receiving the differential intermediate signal; an output stage (OPST) having an input coupled to the output branch (Q4,R4) and an output for delivering an output signal (Vout) to an output (OP) of the amplifier; and means for stabilizing the amplifier, characterized in that the means for stabilizing the amplifier includes: a capacitor (CM2) coupled between the output (OP) of the amplifier and the input branch (Q5,R5), and a further capacitor (CM1) coupled between the output (OP) of the amplifier and the input of the output stage (OPST).