Semiconductor integrated circuit and noncontact information medium
US7138699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2003 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Jan 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor integrated circuit includes a supply voltage generator for rectifying a signal received by an antenna coil and generating a supply voltage set at a predetermined voltage by a regulator, and a demodulator. The demodulator includes a demodulation circuit for demodulating an input signal and outputting the demodulated input signal, a resistor whose one end is connected to one end of the antenna coil, a diode whose anode is connected to the other end of the resistor and whose cathode is connected to a node located to the input end of the demodulation circuit, a first capacitance connected between a node at which the resistor and the diode are connected to each other and a grounding conductor, and a second capacitance connected between a node at which the diode and the demodulation circuit are connected to each other and a grounding conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.