Driver and output buffer circuit
US8299822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2011 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/017536
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A driver circuit transmits a signal generated by a signal level generation circuit to a circuit to be measured by transmitting the signal to a output buffer circuit via a circuit (prebuffer circuit) that drives the output buffer circuit and causing the output buffer circuit to drive a transmission line. The driver circuit includes the prebuffer circuit and a replica buffer circuit formed by imitating the prebuffer circuit. The prebuffer circuit and the replica buffer circuit are disposed in parallel. The driver circuit temporarily increases input bias current to be supplied to output-stage transistors of the output buffer circuit on the basis of output current of the replica buffer circuit during transition of an input or output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.