Variable preemphasis/deemphasis network
US4760602A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Oct 21, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable preemphasis/deemphasis network is disclosed which is coupled between audio input and output terminals. The network exhibits a family of transfer function response characteristics which vary between a full deemphasis characteristic H(f) and a full emphasis characteristic 1/H(f) in response to a control signal and exhibits complementary transfer function response characteristics in response to reciprocal valued control signals. The network includes a signal filter which determines the shape of the transfer function response characteristic, and a gain controlled amplifier which determines which one of the family of transfer function response characteristics is exhibited in response to the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.