Hysteretic control of audio gain in response to battery conditions
US6388524B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2001 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | May 4, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0088
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An electronic accessory, powered by a battery having a first terminal and a second terminal includes a voltage comparator capable of comparing the battery voltage to at least one reference voltage and that generates a voltage comparator signal having a value that is a function of the battery voltage relative to the reference voltage. A gain control circuit couples an input signal to a first signal path when the voltage comparator signal is above a first value and to a second signal path when the voltage comparator signal is below a second value. The first signal path includes a first component that causes an amplifier to have a first gain. The second signal path includes a second component that causes the amplifier to have a second gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.