Method and circuit for reading an array of oscillators
US9667897B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2016 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Mar 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A detection device comprises an array of pixels, each pixel including a sensor and generating an oscillating signal (S); and a frequency detection circuit (206, 208, 210) for detecting the frequency of the oscillating output signal of one or more of the pixels, the frequency detection circuit having: a window generation circuit (208) adapted to generate at least one output signal (WIN_SEN) indicating the start and end times of a first time duration (TWINDOW) corresponding to a plurality of periods of the oscillating output signal; and one or more counters (210) adapted to receive at least one reference signal (TCOUNT, TREAD) indicating the start and end times of a reference time duration (TREF), and to quantify a difference between the first time duration and the reference time duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.