Waveform shaping circuit, signal generation apparatus, and signal reading system
US11349464B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Jul 24, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/003
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A waveform shaping circuit is configured without including a diode that is affected by temperature. The waveform shaping circuit includes: a capacitor with one end into which a differential signal Vd0 is inputted and another end connected to an output; an impedance element that has one end connected to the other end of the capacitor and another end into which a target constant voltage is applied; a switch circuit that is constructed of a series circuit with an impedance element and a switch without including a diode, has one end connected to the output, and has another end into which the target constant voltage is applied; and a switch control circuit that shifts the switch into an on state during a low voltage period in an AC component of the differential signal and shifts the switch to an off state during a high voltage period of the AC component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.