Logic circuits using polycrystalline semiconductor thin film transistors
US6954084B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 2003 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Apr 15, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00234
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A large scale integrated (LSI) or a very large scale integrated (VLSI) logic circuit, such as a fully programmable gate array (FPGA), comprises a plurality of polysilicon thin film transistors TFTs. The circuit, which may include a delay circuit, is asynchronous and does not comprise a clock. Thus, operations to be performed by the TFTs need not be performed within a single clock period—rather the operation of each stage of TFTs in the circuit is dependent on receiving a signal either from an input to the circuit or from a preceding stage in the circuit. Problems with variations in the threshold voltage between the TFTs are therefore avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.