Low-frequency oscillator monitoring circuit
US12298345B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2023 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Apr 30, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31727
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Low-frequency oscillator (LFO) monitoring circuits and methods. An example of an LFO monitoring circuit includes a resistor having first and second resistor terminals with the first resistor terminal coupled to a ground terminal, first and second transistors coupled between a supply voltage terminal and the second resistor terminal, the first transistor having a first control terminal and the second transistor having a second control terminal, a ramp generator having first and second outputs coupled to the first and second control terminals, respectively, and first and second inputs configured to receive, respectively, first and second signals representative of a frequency of a low-frequency oscillator, the ramp generator being configured to provide, at the first output, a first ramp signal based on the first signal and, at the second output, a second ramp signal based on the second signal, and a comparator having a comparator input coupled to the second resistor terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.