Increased synthesizer performance in carrier aggregation/multiple-input, multiple-output systems

摘要

Certain aspects of the present disclosure provide methods and apparatus for using multiple voltage-controlled oscillators (VCOs) to increase frequency synthesizer performance, such as in stringent multiple-input, multiple-output (MIMO) modes. One example apparatus capable of generating oscillating signals generally includes a first VCO, a second VCO, and connection circuitry configured to connect the second VCO in parallel with the first VCO if a phase-locked loop (PLL) associated with the second VCO is idle.

主权项

1. A method for generating oscillating signals, comprising:
outputting a first oscillating signal from a first voltage-controlled oscillator (VCO); and connecting a second VCO in parallel with the first VCO if a phase-locked loop (PLL) associated with the second VCO is idle, wherein the second VCO is configured to operate with a same oscillating frequency as the first VCO, and wherein after the connecting, the first oscillating signal generated by the first VCO and a second oscillating signal generated by the second VCO are injection locked together.