An apparatus comprising: means for generating a local oscillator signal (142, 264, 266, 268, 270) having a duty cycle, said means for generating being biased at a local supply voltage; means for making an absolute adjustment to reduce variation of the duty cycle of the local oscillator signal from a desired duty cycle in response to a difference between a first voltage signal (276, 310, 312, 314, 316), representing a voltage level of the local oscillator signal, and a second voltage signal, representing a voltage level of a portion of the supply voltage corresponding to the desired duty cycle for the local oscillator; wherein the means for making the absolute adjustment to reduce variation of the duty cycle is configured to determine an adjustment signal based on the first and second voltage signals and generate a control signal (CS1, CS2, CS3, CS4) based on the adjustment signal, and wherein the means for generating the local oscillator signal comprise: means for generating a VCO signal (252, 254); means for frequency dividing the VCO signal to generate a frequency-divided signal (256, 258, 260, 262); and means for buffering the frequency-divided signal to generate the local oscillator signal, in response to receiving the control signal, said means for buffering being biased by said local supply voltage; and wherein the means for making the absolute adjustment is configured to adjust the pulse width of the frequency-divided signal by adjusting the amount of current drained from the local voltage supply through the means for buffering. means for generating a local oscillator signal (142, 264, 266, 268, 270) having a duty cycle, said means for generating being biased at a local supply voltage; means for making an absolute adjustment to reduce variation of the duty cycle of the local oscillator signal from a desired duty cycle in response to a difference between a first voltage signal (276, 310, 312, 314, 316), representing a voltage level of the local oscillator signal, and a second voltage signal, representing a voltage level of a portion of the supply voltage corresponding to the desired duty cycle for the local oscillator; wherein the means for making the absolute adjustment to reduce variation of the duty cycle is configured to determine an adjustment signal based on the first and second voltage signals and generate a control signal (CS1, CS2, CS3, CS4) based on the adjustment signal, and wherein the means for generating the local oscillator signal comprise: means for generating a VCO signal (252, 254); means for frequency dividing the VCO signal to generate a frequency-divided signal (256, 258, 260, 262); and means for buffering the frequency-divided signal to generate the local oscillator signal, in response to receiving the control signal, said means for buffering being biased by said local supply voltage; and wherein the means for making the absolute adjustment is configured to adjust the pulse width of the frequency-divided signal by adjusting the amount of current drained from the local voltage supply through the means for buffering. means for generating a VCO signal (252, 254); means for frequency dividing the VCO signal to generate a frequency-divided signal (256, 258, 260, 262); and means for buffering the frequency-divided signal to generate the local oscillator signal, in response to receiving the control signal, said means for buffering being biased by said local supply voltage; and wherein the means for making the absolute adjustment is configured to adjust the pulse width of the frequency-divided signal by adjusting the amount of current drained from the local voltage supply through the means for buffering.