Circuit for generating differential reference voltages, circuit for detecting signal peak, and electronic device
US10855264B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2019 |
| Grant date | Dec 1, 2020 |
| Priority date | — |
| Expiry date | Dec 30, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45156
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for generating differential reference voltages, a circuit for detecting a signal peak, and an electronic device. In the circuit for generating reference voltages, a common-mode extraction circuit receives a first differential signal and a second differential signal, extracts a common-mode level from the first differential signal and the second differential signal, and applies the common-mode level to a non-inverting input terminal of a first operational amplifier. The first operational amplifier, a main control switch, a first voltage dividing resistor, a second voltage dividing resistor, and a first direct current power source constitute a feedback loop, to generate differential reference voltages matching with the common-mode level. Adjusting a current provided by the first direct current power source can change the differential reference voltages, obtaining a reference for to-be-detected amplitude of the signals. Signal amplitude is detected with high precision, and detection reliability of a peak detecting circuit is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.