Programmable switch, adjustable capacitance and resonant circuit effected by means of such a switch
US6034446A · kind A · utility
5Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/94
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention concerns an integrated circuit comprising a resonant circuit (L,20) for receiving by electromagnetic induction an alternating voltage (V.sub.ac), the resonant circuit comprising at least one capacitance (C1-Ci) switchable by means of a programmed switch (11), the switch comprising a circuit breaker (7), a memory cell (6) and a circuit (31, 32, 33, 42) for controlling the circuit beaker (7), the control circuit being supplied by the alternating voltage (V.sub.ac) and arranged for opening or closing the circuit breaker (7) depending on the programming or the erasing status of the memory cell (6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.