Abstract: A balanced mixer circuit (300, 400, 500, 600, 700 and 800) in a baseband receiver (202) includes an oscillator circuit (212), a mixer (214 and 215), a digital-to-analog converter (258 and 259) and a digital signal processor (250). The mixer includes CMOS devices (301, 302, 303 and 304). In response to differential outputs from the mixer, the digital signal processor controls the digital-to-analog converter to output bias voltages for the gate of at least one of the CMOS devices of the mixer to compensate for imbalance in the differential output of the mixer that may be caused by mismatch among two or more CMOS devices of the mixer or caused by other reasons, in order to increase second order intercept point of the mixer.

Abstract: A receiver (300) comprises an antenna input (301), a filter (302), a voltage-to-current converter (303), a down frequency conversion mixer (304), and a current-to-voltage converter (305). The antenna input operably couples to an antenna. The filter has a filter input that operably couples to the antenna input and can further have a filter output. The voltage-to-current converter has an input that is operably coupled to the filter output and can further have a voltage-to-current converter output. The down frequency conversion mixer has a mixer input that is operably coupled to the voltage-to-current converter output and can further have a mixer output. And the current-to-voltage converter has an input that is operably coupled to the mixer output and can further have a current-to-voltage converter output. By one approach, this current-to-voltage converter comprises an amplifier having a current gain of substantially unity or less.

Abstract: A balanced mixer circuit (300, 400, 500, 600, 700 and 800) in a baseband receiver (202) includes an oscillator circuit (212), a mixer (214 and 215), a digital-to-analog converter (258 and 259) and a digital signal processor (250). The mixer includes CMOS devices (301, 302, 303 and 304). In response to differential outputs from the mixer, the digital signal processor controls the digital-to-analog converter to output bias voltages for the gate of at least one of the CMOS devices of the mixer to compensate for imbalance in the differential output of the mixer that may be caused by mismatch among two or more CMOS devices of the mixer or caused by other reasons, in order to increase second order intercept point of the mixer.

Abstract: A balanced mixer circuit (300, 400, 500, 600, 700 and 800) in a baseband receiver (202) includes an oscillator circuit (212), a mixer (214 and 215), a digital-to-analog converter (258 and 259) and a digital signal processor (250). The mixer includes CMOS devices (301, 302, 303 and 304). In response to differential outputs from the mixer, the digital signal processor controls the digital-to-analog converter to output bias voltages for the gate of at least one of the CMOS devices of the mixer to compensate for imbalance in the differential output of the mixer that may be caused by mismatch among two or more CMOS devices of the mixer or caused by other reasons, in order to increase second order intercept point of the mixer.

Abstract: A receiver (300) comprises an antenna input (301), a filter (302), a voltage-to-current converter (303), a down frequency conversion mixer (304), and a current-to-voltage converter (305). The antenna input operably couples to an antenna. The filter has a filter input that operably couples to the antenna input and can further have a filter output. The voltage-to-current converter has an input that is operably coupled to the filter output and can further have a voltage-to-current converter output. The down frequency conversion mixer has a mixer input that is operably coupled to the voltage-to-current converter output and can further have a mixer output. And the current-to-voltage converter has an input that is operably coupled to the mixer output and can further have a current-to-voltage converter output. By one approach, this current-to-voltage converter comprises an amplifier having a current gain of substantially unity or less.

Abstract: A balanced mixer circuit (300, 400, 500, 600, 700 and 800) in a baseband receiver (202) includes an oscillator circuit (212), a mixer (214 and 215), a digital-to-analog converter (258 and 259) and a digital signal processor (250). The mixer includes CMOS devices (301, 302, 303 and 304). In response to differential outputs from the mixer, the digital signal processor controls the digital-to-analog converter to output bias voltages for the gate of at least one of the CMOS devices of the mixer to compensate for imbalance in the differential output of the mixer that may be caused by mismatch among two or more CMOS devices of the mixer or caused by other reasons, in order to increase second order intercept point of the mixer.