Methods and apparatus for reducing the amount of leakage in a transmitter
are disclosed. In one embodiment, a wireless transmitter is comprises: a
divider providing a local oscillation (LO) signal, a plurality of mixers
that receive the LO signal and receive a signal to be modulated, a summer
coupled to the plurality of mixers, and a plurality of amplifiers
serially coupled to the summer. The divider couples to a capacitor, a
resistor, and a power supply and the resistor and the capacitor form a
pole that attenuates the LO signal present on the power supply.