Circuits and methods for generating oscillating signals

A method comprising:

• receiving a differential input signal to be divided, the differential input signal having a first frequency;
• converting the differential input signal into a load signal based on a first component of the differential input signal;
• converting the differential input signal into an injection current having the first frequency based on a second component of the differential input signal;
• providing the load signal to a load;
• producing the injection current at an input of an oscillator, the injection current enabling the oscillator to generate a differential output signal that is based on the injection current and has a second frequency that is a fraction of the first frequency;
• and
• forming a bias current from the injection current and the load signal that are balanced using a first impedance of the load that is matched to a second impedance of the oscillator.

A wireless communication system comprising:

• a frequency synthesizer for generating a first local oscillator signal, the frequency synthesizer comprising:
• an oscillator;
• a load;
• and
• a differential injection circuit having a differential input to receive a differential input signal having a first frequency, a first output coupled to the load to provide a load signal to the load that is based on a first component of the differential input signal, and a second output coupled to the oscillator to provide a first injection signal to the oscillator that is based on a second component of the differential input signal, wherein:
• a first impedance of the load is matched to a second impedance of the oscillator that corresponds to the second output effective to balance the first injection signal with the load signal to form a bias current coupled to the differential injection circuit;
• and
• the oscillator provides a differential output signal having a second frequency that is a fraction of the first frequency and generates the differential output signal within the oscillator using the first injection signal, at least a portion of the differential output signal provided by the oscillator corresponding to the first local oscillator signal;
• a plurality of wireless transceivers, each transceiver comprising:
• a wireless receiver comprising a down-converter, the down-converter receiving a first RF signal modulated at a third frequency and the first local oscillator signal, and in accordance therewith, producing a demodulated baseband signal;
• and
• a wireless transmitter comprising an up-converter, the up-converter receiving a baseband signal and the first local oscillator signal, and in accordance therewith, producing a second RF signal modulated at the third frequency,
• wherein the frequency synthesizer generates a second local oscillator signal for transmission across an integrated circuit, and wherein the second local oscillator signal is divided by a fractional value in each transceiver to said first frequency for use in down-converting said first RF signal and up-converting said baseband signal.