Back to results
US 10,063,366 B2Granted
Fast frequency hopping phase locked loop
AssigneeQUALCOMM Incorporated
InventorsMarco Zanuso, Giovanni Marucci, Tsai-Pi Hung, Francesco Gatta, Bo Sun
Life of this patent
Estimating the term…
Abstract
A fast frequency hopping implementation in a phase lock loop (PLL) circuit achieves a PLL lock to a new frequency in a very short period of time. In one instant, frequency allocation at a transceiver is changed. In response, a local oscillator frequency hops to a new center frequency based on the changed frequency allocation. The hopping to the new center frequency is based on two-point modulation of a phase locked loop.
Claims24
A method for wireless communication comprising:
- changing a frequency allocation at a transceiver;
- applying a tuning voltage to a first input port of a voltage controlled oscillator (VCO) of a phase locked loop;
- and
- hopping a local oscillator frequency to a new center frequency based at least in part on the changed frequency allocation, the hopping to the new center frequency based at least in part on a frequency adjustment in baseband including applying a first frequency adjustment signal to a second input port of the VCO.
1 more element
An apparatus for wireless communication comprising:
- a local oscillator;
- a phase detector coupled to the local oscillator, the local oscillator operable to receive a reference frequency for a transceiver;
- a voltage controlled oscillator (VCO) coupled to the phase detector, the VCO including a first input port and a second input port to respectively receive a tuning voltage and a first frequency adjustment signal;
- a frequency divider coupled to the VCO and to the phase detector to complete a feedback loop of a phase locked loop;
- and
- a control unit coupled to the local oscillator, the control unit operable to determine a change in frequency allocation at the transceiver, the control unit operable to cause the local oscillator to hop from the reference frequency to a new center frequency based at least in part on the changed frequency allocation, the hopping to the new center frequency based at least in part on a frequency adjustment in baseband where the first frequency adjustment signal is applied to the second input port of the VCO.
3 more elements
An apparatus for wireless communication comprising:
- means for generating a phase locked loop reference frequency;
- means for detecting a phase difference between a first frequency and a second frequency, the phase difference detecting means coupled to the phase locked loop reference frequency generating means, the phase locked loop reference frequency generation means operable to receive an original reference frequency for a transceiver;
- a voltage controlled oscillator (VCO) coupled to the phase difference detecting means, the VCO including a first input port and a second input port to respectively receive a tuning voltage and a first frequency adjustment signal;
- a frequency divider coupled to the VCO and to the phase difference detecting means to complete a feedback loop of a phase locked loop;
- and
- control means for determining a frequency change allocation at the transceiver, coupled to the phase locked loop reference frequency generation means, the control means comprising means for causing the reference frequency generation means to hop from the original reference frequency to a new center frequency based at least in part on the changed frequency allocation, the hopping to the new center frequency based at least in part on a frequency adjustment in baseband where the first frequency adjustment signal is applied to the second input port of the VCO.
3 more elements
Dependencies are inferred from the claim text.