Single stage buffer with filter
US9590571B2 · kind B2 · utility
2Cited by
24References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2013 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/07
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A single-stage buffer apparatus includes a first transistor, a second transistor, and a high pass filter network. The first transistor is configured to receive an input signal from a microphone. The second transistor is configured to operate as a cascode transistor. The high pass filter network is coupled to the first transistor and the second transistor. The second transistor electrically decouples the first transistor from an output of the single-stage buffer apparatus. A gate terminal of the second transistor is driven by the high-pass filter network, and the high-pass filter network is driven by the first transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.