Signal generation device, imaging device, and electronic apparatus
AssigneeSony Semiconductor Solutions Corporation
InventorsZhiwei Zhou, Junya Akaike
Life of this patent
Estimating the term…
Abstract
Provided is a signal generation device including: a digitally controlled oscillator, a first path including a phase-locked loop that detects a phase error between an output of the digitally controlled oscillator and a reference signal and performs feedback control of the digitally controlled oscillator via a loop filter, a second path that controls the digitally controlled oscillator based on the reference signal without passing through the loop filter, and a first calibration unit that performs calibration in real time on the digitally controlled oscillator based on a correlation between the phase error and a waveform of the reference signal.
Claims16
A signal generation device comprising:
- a digitally controlled oscillator;
- a first path including a phase-locked loop that detects a phase error between an output of the digitally controlled oscillator and a reference signal, and performs feedback control of the digitally controlled oscillator via a loop filter;
- a second path that controls the digitally controlled oscillator based on the reference signal without passing through the loop filter;
- and
- a first calibration unit that performs calibration in real time on the digitally controlled oscillator based on a correlation between the phase error and a waveform of the reference signal.
An imaging device comprising:
- a plurality of imaging elements that detect light;
- a signal processing unit that performs processing on an output signal from the plurality of imaging elements;
- a control unit that controls the plurality of imaging elements;
- and
- a signal generation device that outputs a reference clock signal to the signal processing unit and the control unit, wherein
- the signal generation device includes:
- a digitally controlled oscillator,
- a first path including a phase-locked loop that detects a phase error between an output of the digitally controlled oscillator and a reference signal, and performs feedback control of the digitally controlled oscillator via a loop filter,
- a second path that controls the digitally controlled oscillator based on the reference signal without passing through the loop filter, and
- a first calibration unit that performs calibration in real time on the digitally controlled oscillator based on a correlation between the phase error and a waveform of the reference signal.
An electronic apparatus provided with a signal generation device, wherein
- the signal generation device includes:
- a digitally controlled oscillator,
- a first path including a phase-locked loop that detects a phase error between an output of the digitally controlled oscillator and a reference signal, and performs feedback control of the digitally controlled oscillator via a loop filter,
- a second path that controls the digitally controlled oscillator based on the reference signal without passing through the loop filter, and
- a first calibration unit that performs calibration in real time on the digitally controlled oscillator based on a correlation between the phase error and a waveform of the reference signal.
Dependencies are inferred from the claim text.