On-chip RC oscillator, chip, and communication terminal
US12166484B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2023 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Jun 15, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/011
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed are an on-chip RC oscillator, a chip, and a communication terminal. The on-chip RC oscillator comprises a stabilized voltage supply module, an RC core oscillator module, a frequency sampling and conversion module, and a frequency trimming module. By means of the frequency sampling and conversion module, the clock frequency of the oscillator is sampled and detected in real time, and the sampled clock frequency is converted into a voltage signal, and then analog-to-digital conversion is performed to obtain a corresponding digital code, so that when the clock frequency changes, the frequency trimming module circuit converts said digital code into a control signal; a voltage having a suitable temperature coefficient is outputted for the RC core oscillator module; also, a zero temperature coefficient current of a suitable magnitude is outputted for the RC core oscillator module, so as to precisely calibrate the clock frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.