Low pass filter and lock detector circuit
US7876148B2 · kind B2 · utility
3Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2008 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Mar 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S331/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low pass filter includes a driver unit configured to output a voltage proportional to an input pulse width, a charge/discharge unit configured to charge the output voltage of the driver unit, a comparator unit configured to compare an output voltage of the charge/discharge unit with a reference value to output a square wave signal, and a switching unit configured to switch the charge/discharge unit to an operation state, based on a bandwidth expansion signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.