Low pass filter and electronic device
US7388439B2 · kind B2 · utility
2Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2004 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Dec 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/181
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The electronic device (100) of the invention comprises a semiconductor device (30) and a low-pass filter (20), which are present in a stacked configuration, and which together include a phase locked loop. The low-pass filter is preferably embodied by vertical trench capacitors, and preferably comprises a drift compensation part. The device (100) can be suitably provided in an open loop architecture. In a preferred embodiment, the low-pass filter comprises a large capacitor (C2) and a small capacitor (C1) connected in parallel, the large capacitor (C2) being connected in series with a resistor (R1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.