Calibration and/or adjusting gain associated with voltage-controlled oscillator
AssigneeSkyworks Solutions, Inc.
InventorsThomas Obkircher, Bipul Agarwal, Wei-Hong Chen
Life of this patent
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Abstract
Apparatus and methods for adjusting a gain of an electronic oscillator, such as a voltage-controlled oscillator (VCO), are disclosed. In one aspect, an apparatus for compensating for VCO gain variations includes a charge pump controller. The charge pump controller can be configured to select a VCO gain model based on a comparison of a VCO gain indicator and a threshold value stored in a memory, obtain VCO gain model parameters from the memory corresponding to the selected VCO gain model, and compute a charge pump current control value using the VCO gain model parameters. The charge pump current control value can be used to compensate for VCO gain variations.
Claims21
(canceled)
A method of computing gain adjustment parameters associated with a voltage-controlled oscillator, the method comprising:
- obtaining gain measurements corresponding to output frequencies of a voltage-controlled oscillator;
- dividing a range of output frequency of the voltage-controlled oscillator into segments based on the gain measurements;
- computing gain adjustment model parameters corresponding to each of the segments based on the gain measurements;
- and
- storing the gain adjustment model parameters to memory.
A wireless communication device comprising:
- an antenna configured to transmit a radio frequency signal;
- and
- a transceiver configured to generate the radio frequency signal, the transceiver including a phase-locked loop having a voltage-controlled oscillator, a charge pump, and a charge pump controller configured to select a slope of a plurality of slopes associated with the voltage-controlled oscillator stored in memory and to compute a charge pump control value for the charge pump using the slope.
A charge pump controller comprising:
- a memory configured to store gain adjustment model parameters;
- a model selector configured to generate a model select indicator based on a comparison of an indicator of gain of an electronic oscillator with a threshold value, the model select indicator corresponding to a selected value of the gain adjustment model parameters stored in the memory;
- and
- a charge pump control calculator coupled to the model selector and configured to compute a charge pump control value for a charge pump using the selected value.
Dependencies are inferred from the claim text.