Waveform shaping circuit, signal generation apparatus, and signal reading system
US11522530B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2021 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Dec 1, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/003
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A waveform shaping circuit includes a capacitor, an impedance element, a switch circuit, and a switch control circuit. Opposite ends of the capacitor are connected to the input and output, respectively. One end of the impedance element supplies a target constant voltage to the output end of the capacitor. The switch circuit has a switch without a diode. When on, the switch applies the target constant voltage to the output. When off, it does not. The switch control circuit switches the switch on during a high voltage period in an AC component of an input pulse signal and switches the switch off during a low voltage period of the AC component. The circuit shapes the input pulse signal into an output pulse signal whose peak-to-peak voltage is equivalent to a peak-to-peak voltage of the AC component and whose voltage during the high voltage period is at the target constant voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.