Differential amplifier circuit and display drive circuit
US9692374B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 2015 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Jun 17, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45032
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential amplifier circuit and display drive circuit having the same are disclosed herein. In one example, a differential amplifier circuit includes a differential pair transistor configure to receive a differential input signal. A current source is connected in series to the differential pair transistor and an output transistor that drives an output terminal on the basis of the differential input signal. The output transistor is configured to increase a current value of a current source on the basis of a timing at which a voltage level of the output terminal is caused to transition. The output transistor is configured to drive the output terminal only during a period in which the output terminal is caused to transition, and thus a slew rate is improved by increasing a bias current of the differential pair transistor in the period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.