Transducer apparatus and methods
US10519033B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2018 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Mar 26, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This application relates to transducer apparatus (300, 400), especially for MEMS capacitive transducers. The apparatus has a voltage bias generator (102) for receiving a supply voltage (VDD) and generating a bias voltage (VB) for biasing a capacitive transducer (101). A voltage supply path extends between a supply voltage input terminal (309a) and the voltage bias generator (102). A programmable trim circuit (207), in use, controls the bias voltage generated by the voltage bias generator. A first filter (301) is configured to applying filtering to the voltage supply path. A programming contact pad (308) is configured to form an external contact of the transducer apparatus when packaged and is electrically coupled to the programmable trim circuit via a signal path that does not include the first filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.