Circuit of frequency counter and method thereof
US9229546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2014 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Aug 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit of frequency counter is adapted for an electromagnetic board with an electromagnetic pen. The counter exemplarily includes a source count module, a motion count module, a logic module, a switching gate module, a signal-capturing module, a frequency-counting module and a control module. The source count module counts number of clock pulses of a first clock signal. A receiver mode is switched by the switching gate module when the number reaches a first predetermined value. The motion count module counts number of clock pulses of a second clock signal. A transmitter mode is made by the switching gate module when the number reaches a second predetermined value. When a cumulative number of circular number counted by the frequency-counting module reaches a third predetermined value, the frequency-counting module completes counting a first high-frequency clock signals, and the control module obtains an operating frequency for the electromagnetic pen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.