| CPC H03L 7/099 (2013.01) [G02B 26/0833 (2013.01); H03B 5/32 (2013.01)] | 19 Claims |
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1. An oscillator control system, comprising:
an oscillator structure configured to simultaneously oscillate about a first rotation axis and a second rotation axis according to a Lissajous pattern that repeats on a frame-by-frame basis, wherein an oscillation about the second rotation axis imparts a deterministic cross-coupling error onto an oscillation about the first rotation axis, and wherein the deterministic cross-coupling error changes in accordance with a Lissajous position within the Lissajous pattern; and
a driver circuit configured to generate a first driving signal to drive the oscillator structure about the first rotation axis at a first driving frequency and generate a second driving signal to drive the oscillator structure about the second rotation axis at a second driving frequency that is different from the first driving frequency to generate the Lissajous pattern,
wherein the driver circuit comprises a phase-locked loop (PLL) configured to regulate the oscillation about the first rotation axis,
wherein the PLL is configured to generate a PLL signal based on a phase error of the oscillation about the first rotation axis,
wherein the PLL comprises a compensation circuit configured to receive the PLL signal and a Lissajous position signal that indicates the Lissajous position within the Lissajous pattern,
wherein the compensation circuit is configured to apply a compensation value to the PLL signal, thereby modifying the PLL signal to generate a compensated PLL signal used for generating the first driving signal, wherein the compensation circuit is configured to determine the compensation value based on the Lissajous position indicated by the Lissajous position signal.
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