Current-to-voltage conversion IC and a photoelectric conversion IC
US6114686A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Apr 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3084
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
To realize a current-to-voltage conversion IC and a photoelectric conversion IC in which the available frequency range does not become narrower as the conversion gain is increased, in a current-to-voltage conversion IC that has a differential amplifier to which a negative feedback resistor of variable resistance is connected and a photodiode connected to the input terminal of the differential amplifier so that the output current of the photodiode is converted into a voltage by means of the negative feedback resistor, the differential amplifier is provided with a switch for varying the capacitance of a capacitor used as a phase compensating element so that the resistance of the negative feedback resistor and the capacitance of the differential amplifier are varied in an interlocked manner in accordance with a signal fed from outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.