Modulation system
US3999149A · kind A · utility
2Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Jun 20, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A modulator for modulating an audio signal in response to a dc signal of adjustable level and concurrently in response to a sub-audio signal, in which the modulating signals do not appear in the output of the modulator nor intermodulate each other, the system including transistor pairs which respond differentially at the bases to the modulating signal and additively to the audio signal in response to application of the audio signal at the emitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.