Constant switch Vgs circuit for minimizing rflatness and improving audio performance
US7782117B2 · kind B2 · utility
8Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2008 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Feb 23, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6877
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A MOSFET switch is disclosed that is driven on by a circuit that provides a constant gate to source voltage, Vgs, that is independent of the input voltage, the power supply and any logic signals. The constant Vgs is derived from a reference voltage and biases the MOSFET switch such that Ron is constant, or Rflatness is minimized. A minimized Rflatness provides a higher fidelity transfer of audio signals compared to prior art switches where Rflatness is greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.