Patent ID: 6456144
Filing Date: 2002-09-24
Classification: H03D

Abstract:
A circuit configuration for mixing an input signal and an oscillator signal with one another, comprising:a phase splitter having an input receiving an oscillator signal, and first and second voltage outputs carrying orthogonal oscillator signals, phase-shifted through 90Â° with respect to one another; a first differential amplifier having a voltage input connected to said first voltage output of said phase splitter and a current output; a second differential amplifier having a voltage input connected to said second voltage output of said phase splitter and a current output; a first controllable current source connected to and supplying said first differential amplifier, said first controllable current source receiving and being controlled by the input signal; a second controllable current source connected to and supplying said second differential amplifier, said second controllable current source receiving and being controlled by the input signal; a first phase shifter connected downstream of said first differential amplifier in a signal flow direction, said first phase shifter having a current input and a current output; a second phase shifter connected downstream of said second differential amplifier in the signal flow direction, said second phase shifter having a current input and a current output; and an adder device connected downstream from said first and second differential amplifiers and generating an output signal.