Patent ID: 6982584

Claim:
In a phase quadrature signal generator including a phase shifter receiving at an input terminal an input signal supplied to phase shifting means formed of passive elements, arranged for delivering at first and second output terminals, first and second in phase quadrature signals, wherein it further includes, between the phase shifting means and the output terminals, transconductor means having a transconductance proportional to the passive elements, arranged so as to obtain a transfer function between said first and second in phase quadrature signals independent of said passive elements, wherein said phase shifting means include: a first phase shifter circuit including a first resistor connected between the input terminal and a first output of the phase shifting means and a first capacitor connected between the first output of the phase shifting means and a reference potential, a second phase shifter circuit including a second capacitor, matched to said first capacitor, connected between the input terminal and a second output of the phase shifting means and a second resistor, matched to said first resistor, connected between the second output of the phase shifting means and said reference potential and wherein said transconductor means include a first transconductor circuit having a first determined transconductance proportional to a capacitance matched to the capacitance of said first and second capacitors, and a second transconductor circuit having a second determined transconductance proportional to a conductance matched with said first and second resistors.