17893471. Ring Oscillator Phase-locked Loop with Digital Phase Noise Suppression simplified abstract (Apple Inc.)
Contents
Ring Oscillator Phase-locked Loop with Digital Phase Noise Suppression
Organization Name
Inventor(s)
Ahmed I Hussein of San Jose CA (US)
Mahdi Forghani of Los Angeles CA (US)
David M Signoff of Santa Clara CA (US)
Ring Oscillator Phase-locked Loop with Digital Phase Noise Suppression - A simplified explanation of the abstract
This abstract first appeared for US patent application 17893471 titled 'Ring Oscillator Phase-locked Loop with Digital Phase Noise Suppression
Simplified Explanation
The patent application describes an electronic device with wireless circuitry that includes mixer circuitry receiving an oscillator signal from phase-locked loop circuitry. The phase-locked loop circuitry consists of a digital or analog phase-locked loop with a first frequency divider, a ring oscillator, and an auxiliary phase noise cancellation loop connected to the ring oscillator. The auxiliary phase noise cancellation loop includes a time-to-digital converter, a second frequency divider, an amplifier, and a bandpass filter to reject noise associated with the time-to-digital converter. The first frequency divider has a first division ratio, while the second frequency divider has a second division ratio less than the first to provide faster phase noise correction.
- The electronic device includes wireless circuitry with mixer circuitry and phase-locked loop circuitry.
- The phase-locked loop circuitry can be digital or analog and includes a first frequency divider, a ring oscillator, and an auxiliary phase noise cancellation loop.
- The auxiliary phase noise cancellation loop comprises a time-to-digital converter, a second frequency divider, an amplifier, and a bandpass filter.
- The first frequency divider has a higher division ratio than the second frequency divider to improve phase noise correction speed.
- Potential Applications
- This technology can be applied in wireless communication devices such as smartphones, tablets, and IoT devices. - It can also be used in radar systems, satellite communication systems, and other wireless applications requiring precise frequency control.
- Problems Solved
- Helps in reducing phase noise in wireless communication systems, improving signal quality and reliability. - Provides faster and more efficient phase noise correction, enhancing overall performance of the electronic device.
- Benefits
- Improved signal quality and reliability in wireless communication devices. - Faster and more efficient phase noise correction for better performance. - Enhanced frequency control and stability in various wireless applications.
Original Abstract Submitted
An electronic device may include wireless circuitry having mixer circuitry configured to receive an oscillator signal from phase-locked loop circuitry. The phase-locked loop circuitry may include a digital or analog phase-locked loop having a first frequency divider, a ring oscillator, and an auxiliary phase noise cancellation loop coupled to the ring oscillator. The auxiliary phase noise cancellation loop may include at least a time-to-digital converter, a second frequency divider, an amplifier, and a bandpass filter configured to reject thermal and quantization noise associated with the time-to-digital converter. The first frequency divider may have a first division ratio, whereas the second frequency divider may have a second division ratio that is less than the first division ratio to provide faster phase noise correction.
