Semiconductor device and electronic device having the same
US8095104B2 · kind B2 · utility
13Cited by
14References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2007 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | May 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00084
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor device includes an antenna circuit for receiving a wireless signal, a power supply circuit generating power by the wireless signal received by the antenna circuit, and a clock generation circuit to which power is supplied. The clock generation circuit includes a ring oscillator which self-oscillates and a frequency divider which adjusts frequency of an output signal of the ring oscillator in an appropriate range. A digital circuit portion is driven by a clock having high frequency accuracy, so that a malfunction such as an incorrect operation or no response is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.