Amplitude modulated transmitter
US3961287A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1975 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Apr 16, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C1/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplitude modulated transmitter is disclosed for use in the frequency range generally below 50 mega-hertz. The transmitter is provided with a series diode modulator which is provided with a corrected modulating signal which biases the diode in proportion to the modulating signal. The modulating signal is derived from comparison in a difference amplifier between the desired audio input signal and a signal derived from the output of the output amplifier by means of a directional coupler. The directional coupler samples the magnitude and phase of the current and voltage at the output and feeds a signal proportional to the inciden as contrasted to any reflected component, of the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.