Oscillator circuit and radio receiver
US11463045B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2019 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Aug 20, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1638
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is an oscillator circuit including an LC oscillator circuit, an amplitude detection circuit, and a bias generation circuit, in which the LC oscillator circuit includes an inductor and at least one variable capacitance element, the amplitude detection circuit detects an oscillation amplitude of the LC oscillator circuit and converts the oscillation amplitude into a DC voltage, and the bias generation circuit compares the DC voltage with a voltage for generating a bias signal, the voltage changing on the basis of a temperature fluctuation of the bias generation circuit, calculates a difference between the DC voltage and a voltage after the change, and generates, on the basis of the difference, a bias signal that reduces a fluctuation in the oscillation amplitude, to control the oscillation amplitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.