Trimmer method and device for circuits
US6703885B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Sep 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/56
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a trimmer method and device, a reference signal of a target circuit is compared with a test signal, and a binary count output is generated according to result of the comparison. Thereafter, according to logic states of bits of the binary count output, electrical conduction through passive components that are coupled to the target circuit and that correspond respectively to the bits of the binary count output are selectively enabled and disabled so as to adjust the reference signal. The above steps are repeated by varying the binary count output until the reference signal approximates the test signal. Thereafter, fuses coupled to the passive components are melted selectively in a single fuse-melting operation so as to maintain the enabled and disabled states of electrical conduction through the passive components in order to set the reference signal to be approximate to the test signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.